KR100540279B1 - R502 and r22 substitute mixed refrigerant and refrigeration system using thereof - Google Patents
R502 and r22 substitute mixed refrigerant and refrigeration system using thereof Download PDFInfo
- Publication number
- KR100540279B1 KR100540279B1 KR1020050006144A KR20050006144A KR100540279B1 KR 100540279 B1 KR100540279 B1 KR 100540279B1 KR 1020050006144 A KR1020050006144 A KR 1020050006144A KR 20050006144 A KR20050006144 A KR 20050006144A KR 100540279 B1 KR100540279 B1 KR 100540279B1
- Authority
- KR
- South Korea
- Prior art keywords
- weight
- mixed refrigerant
- refrigerant
- present
- refrigeration
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/02—Materials undergoing a change of physical state when used
- C09K5/04—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/02—Materials undergoing a change of physical state when used
- C09K5/04—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa
- C09K5/041—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/02—Materials undergoing a change of physical state when used
- C09K5/04—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa
- C09K5/041—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems
- C09K5/042—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems comprising compounds containing carbon and hydrogen only
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/02—Materials undergoing a change of physical state when used
- C09K5/04—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa
- C09K5/041—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems
- C09K5/044—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems comprising halogenated compounds
- C09K5/045—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems comprising halogenated compounds containing only fluorine as halogen
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
- F25B9/004—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
- F25B9/006—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant containing more than one component
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2205/00—Aspects relating to compounds used in compression type refrigeration systems
- C09K2205/10—Components
- C09K2205/12—Hydrocarbons
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2205/00—Aspects relating to compounds used in compression type refrigeration systems
- C09K2205/40—Replacement mixtures
- C09K2205/43—Type R22
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2205/00—Aspects relating to compounds used in compression type refrigeration systems
- C09K2205/40—Replacement mixtures
- C09K2205/47—Type R502
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lubricants (AREA)
Abstract
본 발명은 증기 압축식 냉동기 또는 공조기에서 사용되는 R502와 R22를 대체하기 위한 혼합냉매 및 이를 사용한 냉동시스템에 관한 것으로, 더욱 상세하게는 오존층파괴와 지구온난화를 일으키지 않으면서 동시에 기존의 냉동시스템을 대체하지 않고 사용할 수 있도록 하는 프로필렌, 프로판, 1,1-디플루오로에탄, 디메틸에테르 및 이소부탄을 조합하여 구성되는 혼합냉매 및 이를 사용한 냉동시스템에 관한 것이다. 본 발명의 바람직한 실시예에 따른 혼합냉매는 R1270(프로필렌), R290(프로판) 및 R152a(1,1-디플루오로에탄)로 구성된다.The present invention relates to a mixed refrigerant for replacing R502 and R22 used in a vapor compression refrigerator or an air conditioner and a refrigeration system using the same, and more particularly, to replace an existing refrigeration system without causing ozone layer destruction and global warming. It relates to a mixed refrigerant and a refrigeration system using a combination of propylene, propane, 1,1-difluoroethane, dimethyl ether and isobutane that can be used without. The mixed refrigerant according to a preferred embodiment of the present invention is composed of R1270 (propylene), R290 (propane) and R152a (1,1-difluoroethane).
Description
본 발명은 증기 압축식 냉동/공조기에서 냉매(Refrigerant, 이하 R이라 한다)로 사용할 수 있는 물질 즉 '프로필렌과 프로판 그리고 R152a와 디메틸에테르(이하 DME라 한다)와 이소부탄을 조합하여 구성된 혼합냉매 및 이를 사용한 냉동시스템'에 관한 것이며 좀더 구체적으로는 지금까지 저온용 냉동고 및 수송용 냉동기 등에 널리 사용되어 온 R502(이하 혹은 CFC502라 한다)와 가정용 에어컨, 상업용 공조기 등에 널리 사용되어 온 모노클로로플루오로메탄(CHClF2, 이하 R22 혹은 HCFC22라 한다)을 대체할 수 있는 혼합냉매 및 냉동시스템에 관한 것이다.The present invention is a mixed refrigerant composed of a material that can be used as a refrigerant (referred to as R) in a vapor compression refrigeration / air conditioner, namely, 'propylene and propane and a combination of R152a, dimethyl ether (hereinafter referred to as DME) and isobutane; It is related to the refrigeration system using the same, and more specifically, monochlorofluoromethane which has been widely used in R502 (hereinafter referred to as CFC502), which has been widely used in low temperature freezers and transport refrigerators, and home air conditioners and commercial air conditioners. A mixed refrigerant and refrigeration system can be substituted for CHClF 2 (hereinafter referred to as R22 or HCFC22).
CFC502는 48.8중량% 모노클로로플루오로메탄(이하 R22 혹은 HCFC22라 한다)과 51.2중량% 클로로펜타플루오루에탄(이하 R115 혹은 CFC115라 한다)을 혼합한 공비혼합냉매이다.CFC502 is an azeotropic mixed refrigerant comprising 48.8% by weight monochlorofluoromethane (hereinafter referred to as R22 or HCFC22) and 51.2% by weight chloropentafluoroethane (hereinafter referred to as R115 or CFC115).
지금까지는 냉동기, 에어컨, 열펌프 등의 냉매로서 메탄 또는 에탄에서 유도한 염화불화탄소(Chlorofluorocarbon, 이하 CFC라 한다)와 수소화염화불화탄소(Hydrochlorofluorocarbon, 이하 HCFC라 한다)가 주로 사용되어 왔으며 특히 저온용 냉동고, 수송용 냉동기, 슈퍼마켓 냉동기 등에는 비등점이 -45.4℃이고 분자 질량이 111.6kg/kmol인 CFC502가 가장 널리 사용되어 왔고 가정용 에어컨, 상업용 공조기 등에는 비등점이 -40.8℃이고 분자 질량이 86.47kg/kmol인 HCFC22가 가장 널리 사용되어 왔다.Until now, chlorofluorocarbons (hereinafter referred to as CFCs) and hydrochlorofluorocarbons (hereinafter referred to as CFCs) derived from methane or ethane have been mainly used as refrigerants for refrigerators, air conditioners, and heat pumps. CFC502, which has a boiling point of -45.4 ° C and a molecular mass of 111.6kg / kmol, is the most widely used in freezers, transport freezers, supermarket freezers, etc., and has a boiling point of -40.8 ° C and a molecular mass of 86.47kg / for home air conditioners and commercial air conditioners. HCFC22, kmol, has been the most widely used.
그러나 최근에는 CFC와 HCFC에 의한 성층권 내 오존층 파괴가 중요한 지구환경문제로 대두되었고 이로 인해 성층권 오존을 파괴하는 CFC와 HCFC의 생산과 소비는 1987년에 만들어진 몬트리올 의정서에 의해 규제를 받고 있다. CFC502와 HCFC22는 오존파괴지수(Ozone depletion potential, 이하 ODP라 한다)가 각각 0.18과 0.05로 높아서 현재 선진국에서는 몬트리올 의정서에 의거하여 전폐되거나 전폐될 예정이며 따라서 전 세계 대부분의 국가가 오존파괴지수(ODP)가 0.0인 대체냉매를 사용하려 하고 있다.Recently, however, the destruction of the stratospheric ozone layer by CFCs and HCFCs has emerged as an important global environmental problem, and the production and consumption of stratospheric ozone-depleting CFCs and HCFCs is regulated by the Montreal Protocol, created in 1987. The CFC502 and HCFC22 have high Ozone Depletion Potential (ODP) of 0.18 and 0.05, respectively, so that in developed countries, they will be fully or fully pursuant to the Montreal Protocol. You are trying to use an alternative refrigerant with.
또 최근에는 오존층 파괴 문제뿐만 아니라 지구 온난화 문제도 급속도로 부상하기 시작했고 1997년의 교토 의정서는 지구온난화지수(Global warming potential, 이하 GWP라 한다)가 높은 HFC 냉매의 사용을 자제할 것을 강력히 권하고 있다. 이런 추세를 반영하여 유럽과 일본의 냉장고 제조 회사는 거의 대부분의 냉장고에 탄화수소인 이소부탄(이하 R600a라 한다)을 냉매로 쓰고 있으며 가정용 에어컨, 히트 펌프, 저온용 냉동고, 자동차 에어컨 등을 생산하는 업체들도 지구온난화지수(GWP)가 낮은 탄화수소 계열의 냉매를 사용하려 하고 있다.Recently, not only the ozone depletion problem but also the global warming problem has begun to emerge rapidly, and the 1997 Kyoto Protocol strongly recommends refusing to use HFC refrigerants with high global warming potential (GWP). . Reflecting this trend, European and Japanese refrigerator manufacturing companies use isobutane (hereinafter referred to as R600a) as a refrigerant in almost all refrigerators and produce household air conditioners, heat pumps, low temperature freezers and automobile air conditioners. Some are also trying to use hydrocarbon-based refrigerants with a low global warming index (GWP).
[표 1]은 몇몇 냉매의 환경 지수를 보여 준다. Table 1 shows the environmental indices of some refrigerants.
(*) ODP는 CFC11을 1.0으로 정해서 기준으로 삼은 것임.(*) ODP is based on CFC11 as 1.0.
(**) GWP는 100년 기준 이산화탄소를 1.0으로 정해서 기준으로 삼은 것임.(**) GWP is based on a 100-year carbon dioxide standard of 1.0.
[표 1]에서 볼 수 있듯이, 프로필렌, 프로판, 이소부탄, DME, 그리고 HFC152a 등은 오존층파괴지수(ODP)가 0.0이고 지구온난화지수(GWP)도 다른 냉매들에 비해 현저히 낮다. 바로 이런 특성으로 인해 현재 유럽 연합과 일본 그리고 아시아의 대부분 국가들이 ODP가 0.0이고 GWP가 기존의 CFC 냉매나 HFC 냉매보다 낮은 냉매들을 혼합하여 원하는 열역학적 특성을 얻고 또 동시에 효율 향상이나 기름과의 호환성 증대를 이루려 한다. 이런 점에서 프로필렌, 프로판, 이소부탄, DME, 그리고 HFC152a 등은 적격이라 할 수 있다.As shown in Table 1, propylene, propane, isobutane, DME, and HFC152a have an ozone depletion index (ODP) of 0.0 and a global warming index (GWP). This is why most countries in the European Union, Japan and Asia now mix refrigerants with an ODP of 0.0 and lower GWP than conventional CFC or HFC refrigerants to achieve the desired thermodynamic properties while at the same time improving efficiency or increasing oil compatibility. To achieve. In this sense, propylene, propane, isobutane, DME, and HFC152a are eligible.
어떤 물질이 기존 냉매의 대체냉매로 유용하려면 우선 기존 냉매와 유사한 성능계수(Coefficient of performance, 이하 COP라 한다)를 가져야 한다. 여기서 성능계수(COP)란 압축기에 가해진 일과 대비한 총 냉동효과를 의미하는 것으로서 COP가 클수록 냉동/공조기의 에너지 효율이 좋다. 또한 압축기를 크게 개조하지 않고 사용하려면 대체냉매가 기존 냉매와 비슷한 증기압을 가져서 궁극적으로 비슷한 체적용량(Volumetric capacity, 이하 VC라 한다)을 제공해야 한다. 여기서 체적용량(VC)이란 단위 체적 당 냉동 효과를 뜻하는데 이것은 압축기의 크기를 나타내는 인자로서 대개 증기압에 비례하고 단위는 kJ/㎥이다. 대체냉매가 기존 냉매와 비슷한 체적용량을 낸다면 제조업체는 압축기를 바꾸거나 크게 개조하지 않고도 냉동/공조기를 제작할 수 있어 매우 유리하다. 그러나 지금까지의 연구 결과 순수 물질로 기존 냉매를 대체하는 경우 대체냉매의 체적용량이 달라서 필연적으로 압축기를 바꾸거나 크게 개조해야 하며 또 기존 냉매와 비슷한 성능계수를 내기가 어렵다는 것이 밝혀졌다. In order for a material to be useful as an alternative to a conventional refrigerant, it must first have a coefficient of performance (COP) similar to that of a conventional refrigerant. The coefficient of performance (COP) refers to the total refrigeration effect compared to the work applied to the compressor, the larger the COP, the better the energy efficiency of the refrigeration / air conditioner. In addition, in order to use the compressor without major modifications, the alternative refrigerant must have a vapor pressure similar to that of the existing refrigerant and ultimately provide a similar volumetric capacity (VC). Here, the volumetric capacity (VC) refers to the refrigeration effect per unit volume, which is a factor indicating the size of the compressor, which is usually proportional to the vapor pressure and is in kJ / m 3. If the replacement refrigerant has a volume capacity similar to that of the existing refrigerant, it is very advantageous for manufacturers to build refrigeration / air conditioning without changing compressors or making major modifications. However, studies to date have shown that in case of replacing the existing refrigerant with pure material, the volume of the replacement refrigerant is different, so it is inevitable to change or largely modify the compressor, and it is difficult to obtain a similar coefficient of performance as the existing refrigerant.
이를 해결할 수 있는 방법 중 하나가 혼합냉매를 이용하는 것이다. 혼합냉매의 특성은 조성을 잘 배합해서 성능계수를 기존 냉매와 비슷하게 하고 동시에 기존 냉매와 비슷한 체적용량(VC)을 내게 하며 이로써 압축기를 크게 개조할 필요가 없게 만들 수 있다는 것이다. 이런 특성 때문에 지난 몇 년간 CFC502나 HCFC22의 대체물로 여러 혼합냉매가 제안된바 있으나 그것들 중 몇몇은 몬트리올 의정서에서 사용을 금하는 HCFC를 구성 성분으로 가지고 있어 장기적인 관점에서 볼 때 적합한 대체물이라 할 수 없다. One way to solve this is to use a mixed refrigerant. The characteristics of mixed refrigerants are that they can be formulated so that their coefficients of performance are similar to those of conventional refrigerants, while at the same time providing a volumetric capacity (VC) similar to conventional refrigerants, thereby eliminating the need for major modifications to the compressor. Due to these characteristics, several mixed refrigerants have been proposed as substitutes for CFC502 and HCFC22 in the past few years, but some of them have HCFCs which are prohibited from use in the Montreal Protocol, and thus are not suitable alternatives in the long term.
미국의 듀퐁 사는 오존층 붕괴를 일으키지 않는 R404A라는 3원 혼합냉매(44중량% R125 / 52중량% R143a / 4중량% R134a)를 개발했으나 이 냉매는 R502보다 에너지 효율이 낮으므로 지구 온난화의 간접 효과를 가속화시킬 우려가 있고 또 교토 의정서에서 사용을 제한하는 HFC만으로 구성되어 있어 장기적 관점에서 적합한 대체물이라 할 수 없다. 또 미국의 듀퐁 사 등이 개발한 R407C라는 3원 혼합냉매(23중량% R32 / 25중량% R125 / 52중량% R134a)는 냉동 용량이 기존의 HCFC22와 비슷하지만 에너지 효율이 낮고 온도 구배가 7℃정도가 되어 시스템에 누출이 있을 경우 조성 분리 현상이 생기는 단점을 갖고 있다. 한편 얼라이드시그날 사 등에서는 R410A라는 2원 혼합냉매(50중량% R32 / 50중량% R125)를 개발하여 판매하고 있으나 이 냉매는 증기압이 기존의 HCFC22보다 60% 정도 높아서 필수적으로 압축기를 개조해야 하고 시스템의 압력이 높으므로 응축기에 쓰이는 재질의 강도를 높여야 한다.Dupont of the United States has developed a three-way mixed refrigerant, R404A (44% by weight R125 / 52% by weight R143a / 4% by weight, R134a) that does not cause ozone decay, but this refrigerant is less energy efficient than R502, thus inducing the indirect effects of global warming. It is a suitable alternative in the long term because it consists only of HFCs that may be accelerated and limit the use in the Kyoto Protocol. In addition, the three-way mixed refrigerant R407C (23 wt% R32 / 25 wt% R125 / 52 wt% R134a), developed by DuPont, USA, has a freezing capacity similar to that of the conventional HCFC22, but its energy efficiency is low and the temperature gradient is 7 ° C. If the system is leaking to a degree, there is a disadvantage in that the composition is separated. Meanwhile, Allied Signal Co., Ltd. has developed and sold a binary mixture refrigerant (50% by weight R32 / 50% by weight R125) called R410A. However, this refrigerant has a vapor pressure of about 60% higher than the conventional HCFC22. Because of the high pressure, the strength of the material used in the condenser must be increased.
본 발명은 상기한 종래기술의 문제점을 해결하기 위해 안출된 것으로, 본 발명의 목적은 오존층파괴와 지구온난화를 일으키지 않는 물질인 프로필렌과 프로판 그리고 R152a와 디메틸에테르(이하 DME라 한다)와 이소부탄을 적절한 조성비율로 조합하여 사용함으로써 기존 냉동시스템을 교체하거나 크게 개조하지 않고 기존 냉동시스템에 직접 적용할 수 있도록 하는 혼합냉매 및 이를 사용한 냉동시스템을 제공하는 것이다.The present invention has been made to solve the above problems of the prior art, the object of the present invention is propylene and propane, R152a and dimethyl ether (hereinafter referred to as DME) and isobutane which are substances that do not cause ozone layer destruction and global warming It is to provide a mixed refrigerant and a refrigeration system using the same that can be applied directly to the existing refrigeration system without replacing or remodeling the existing refrigeration system by using the combination in an appropriate composition ratio.
상기한 본 발명의 목적은 냉동/공조기용 혼합냉매에 있어서 R1270(프로필렌) 1 내지 98중량%, R290(프로판) 1 내지 98중량%, R152a(1,1-디플루오로에탄) 1 내지 50중량%로 구성된 혼합냉매에 의해 달성될 수 있다.The object of the present invention described above is 1 to 98% by weight of R1270 (propylene), 1 to 98% by weight of R290 (propane), and 1 to 50% by weight of R152a (1,1-difluoroethane) in a refrigeration / air conditioner mixed refrigerant. It can be achieved by a mixed refrigerant composed of%.
상기 목적을 달성하기 위해, 냉동/공조기용 혼합냉매에 있어서 R1270(프로필렌) 1 내지 25 중량%, R290(프로판) 60 내지 90 중량%, R152a(1,1-디플루오로에탄) 1 내지 15 중량%로 구성되는 것이 바람직하다.In order to achieve the above object, 1 to 25% by weight of R1270 (propylene), 60 to 90% by weight of R290 (propane), 1 to 15% by weight of R152a (1,1-difluoroethane) in a mixed refrigerant for refrigeration / air conditioner It is preferably composed of%.
상기 목적을 달성하기 위해, 냉동/공조기용 혼합냉매에 있어서 R1270(프로필렌) 20 내지 50 중량%, R290(프로판) 30 내지 50 중량%, R152a(1,1-디플루오로에탄) 1 내지 40 중량%로 구성되는 것이 바람직하다.In order to achieve the above object, 20 to 50% by weight of R1270 (propylene), 30 to 50% by weight of R290 (propane), 1 to 40% by weight of R152a (1,1-difluoroethane) in a mixed refrigerant for refrigeration / air conditioner It is preferably composed of%.
상기 목적을 달성하기 위해, 냉동/공조기용 혼합냉매에 있어서 R1270(프로필렌) 60 내지 90 중량%, R152a(1,1-디플루오로에탄) 10 내지 40중량%로 구성되는 것이 바람직하다.In order to achieve the above object, it is preferable that the mixed refrigerant for refrigeration / air conditioner is composed of 60 to 90 wt% of R1270 (propylene) and 10 to 40 wt% of R152a (1,1-difluoroethane).
상기 목적을 달성하기 위해, 냉동/공조기용 혼합냉매에 있어서 R1270(프로필렌) 50 내지 90 중량%, R152a(1,1-디플루오로에탄) 10 내지 50중량%로 구성되는 것이 바람직하다.In order to achieve the above object, it is preferable that 50 to 90% by weight of R1270 (propylene) and 10 to 50% by weight of R152a (1,1-difluoroethane) in the refrigeration / air conditioner mixed refrigerant.
또한 상기한 본 발명의 목적은 냉동/공조기용 혼합냉매에 있어서 R1270(프로필렌) 1 내지 98중량%, R290(프로판) 1 내지 98중량%, RE170(디메틸에테르) 1 내지 50중량%로 구성된 혼합냉매에 의해서도 달성될 수 있다.In addition, the object of the present invention described above is a mixed refrigerant consisting of 1 to 98% by weight of R1270 (propylene), 1 to 98% by weight of R290 (propane), and 1 to 50% by weight of RE170 (dimethyl ether) in a refrigeration / air conditioner mixed refrigerant. It can also be achieved by
상기 목적을 달성하기 위해, 냉동/공조기용 혼합냉매에 있어서 R1270(프로필렌) 1 내지 20중량%, R290(프로판) 70 내지 80 중량%, RE170(디메틸에테르) 1 내지 20중량%로 구성되는 것이 바람직하다.In order to achieve the above object, it is preferred that 1 to 20% by weight of R1270 (propylene), 70 to 80% by weight of R290 (propane), and 1 to 20% by weight of RE170 (dimethyl ether) in a mixed refrigerant for refrigeration / air conditioner. Do.
상기 목적을 달성하기 위해, 냉동/공조기용 혼합냉매에 있어서 R1270(프로필렌) 1 내지 70중량%, R290(프로판) 10 내지 70 중량%, RE170(디메틸에테르) 10 내지 20중량%로 구성되는 것이 바람직하다.In order to achieve the above object, it is preferable that the mixed refrigerant for refrigeration / air conditioner is composed of 1 to 70% by weight of R1270 (propylene), 10 to 70% by weight of R290 (propane), and 10 to 20% by weight of RE170 (dimethyl ether). Do.
상기 목적을 달성하기 위해, 냉동/공조기용 혼합냉매에 있어서 R1270(프로필렌) 50 내지 90중량%, RE170(디메틸에테르) 10 내지 50중량%로 구성되는 것이 바람직하다.In order to achieve the above object, it is preferable that 50 to 90% by weight of R1270 (propylene) and 10 to 50% by weight of RE170 (dimethyl ether) in a mixed refrigerant for a freezer / air conditioner.
또한 상기한 본 발명의 목적은 냉동/공조기용 혼합냉매에 있어서 R1270(프로필렌) 1 내지 98중량%, R290(프로판) 1 내지 98중량%, R600a(이소부탄) 1 내지 20중량%로 구성된 혼합냉매에 의해서도 달성될 수 있다.In addition, the object of the present invention described above is a mixed refrigerant consisting of 1 to 98% by weight of R1270 (propylene), 1 to 98% by weight of R290 (propane), and 1 to 20% by weight of R600a (isobutane) in a refrigeration / air conditioner mixed refrigerant. It can also be achieved by
상기 목적을 달성하기 위해, 냉동/공조기용 혼합냉매에 있어서 R1270(프로필렌) 20 내지 70중량%, R290(프로판) 1 내지 70중량%, R600a(이소부탄) 1 내지 20중량%로 구성되는 것이 바람직하다.In order to achieve the above object, it is preferable that the mixed refrigerant for refrigeration / air conditioner is composed of 20 to 70% by weight of R1270 (propylene), 1 to 70% by weight of R290 (propane), and 1 to 20% by weight of R600a (isobutane). Do.
상기 목적을 달성하기 위해, 냉동/공조기용 혼합냉매에 있어서 R1270(프로필렌) 50 내지 80중량%, R290(프로판) 10 내지 40중량%, R600a(이소부탄) 1 내지 10중량%로 구성되는 것이 바람직하다.In order to achieve the above object, it is preferred that 50 to 80% by weight of R1270 (propylene), 10 to 40% by weight of R290 (propane), and 1 to 10% by weight of R600a (isobutane) in a mixed refrigerant for a refrigerator / air conditioner. Do.
또한 상기한 본 발명의 목적은 상기 혼합냉매를 사용하는 냉동/공조기에 의해서도 달성될 수 있다.In addition, the above object of the present invention can be achieved by a refrigeration / air conditioner using the mixed refrigerant.
본 발명의 그밖의 목적, 특정한 장점 및 신규한 특징들은 첨부된 도면들과 연관되어지는 이하의 상세한 설명과 바람직한 실시예들로부터 더욱 분명해질 것이다.Other objects, specific advantages and novel features of the invention will become more apparent from the following detailed description and the preferred embodiments associated with the accompanying drawings.
이하에서는 첨부한 도면을 참조하여 본 발명의 바람직한 실시예에 따른 R502와 R22 대체용 혼합냉매 및 이를 사용한 냉동시스템의 구성에 대하여 상세히 설명하기로 한다.Hereinafter, with reference to the accompanying drawings it will be described in detail with respect to the configuration of the mixed refrigerant for R502 and R22 and the refrigeration system using the same according to an embodiment of the present invention.
본 발명은 증기 압축식 냉동/공조기에서 냉매(Refrigerant, 이하 R이라 한다)로 사용할 수 있는 물질 즉 '프로필렌과 프로판 그리고 R152a와 디메틸에테르(이하 DME라 한다)와 이소부탄을 선택적으로 조합하여 구성되는 혼합냉매 및 이를 사용한 냉동시스템'에 관한 것이며 좀더 구체적으로는 지금까지 저온용 냉동고 및 수송용 냉동기 등에 널리 사용되어 온 R502(이하 혹은 CFC502라 한다)와 가정용 에어컨, 상업용 공조기 등에 널리 사용되어 온 모노클로로플루오로메탄(CHClF2, 이하 R22 혹은 HCFC22라 한다)을 대체할 수 있는 혼합냉매 및 이를 시용한 냉동시스템에 관한 것이다.The present invention is composed of a material which can be used as a refrigerant (referred to as R) in a vapor compression refrigeration / air conditioner, namely, 'propylene, propane, R152a, dimethyl ether (hereinafter referred to as DME), and isobutane. Mixed refrigerant and a refrigeration system using the same. More specifically, R502 (hereinafter referred to as CFC502), which has been widely used in low temperature freezers and transport freezers, and monochloro chloride, which has been widely used in domestic air conditioners and commercial air conditioners, The present invention relates to a mixed refrigerant capable of replacing fluoromethane (CHClF 2 , hereinafter R22 or HCFC22) and a refrigeration system using the same.
본 발명의 목적은 오존파괴지수(ODP)가 0.0이므로 성층권 내 오존층에 전혀 영향을 미치지 않으며 지구온난화지수 또한 기존의 다른 대체냉매보다 낮고 동시에 기존의 압축기를 크게 개조하지 않고도 CFC502와 HCFC22의 대체냉매로 사용할 수 있는 혼합냉매를 제공하는 것이다.The object of the present invention is that since the ODP is 0.0, it does not affect the ozone layer in the stratosphere at all, and the global warming index is also lower than that of other conventional refrigerants, and at the same time, it is an alternative refrigerant of CFC502 and HCFC22 without greatly modifying the existing compressor. It is to provide a mixed refrigerant that can be used.
좀더 구체적으로 본 발명은 R1270(프로필렌, Propylene)과 R290(프로판, Propane) 그리고 R152a(1,1-디플루오로에탄)와 RE170(디메틸에테르, DME)과 R600a(이소부탄, Iso-butane)을 선택적으로 조합하여 구성된 혼합냉매 및 이를 사용한 냉동시스템에 관한 것이다. 본 발명에서 제안하는 대체 혼합냉매는 오존파괴지수(ODP)가 0.0이고 기존의 다른 대체냉매에 비해 지구온난화지수(GWP)가 낮으며 또 CFC502나 HCFC22의 성능계수(COP)와 체적용량(VC)에 근접한 값을 낸다.More specifically, the present invention relates to R1270 (propylene, propylene) and R290 (propane, propane) and R152a (1,1-difluoroethane) and RE170 (dimethyl ether, DME) and R600a (isobutane, Iso-butane). The present invention relates to a mixed refrigerant selectively configured in combination and a refrigeration system using the same. The alternative mixed refrigerant proposed in the present invention has an ozone depletion index (ODP) of 0.0 and a lower global warming index (GWP) than other alternative refrigerants, and the coefficient of performance (COP) and volume capacity (VC) of CFC502 or HCFC22. Yields a value close to
도 1은 본 발명에서 사용한 일반적인 냉동/공조기의 구성도이다. 도 1에 도시된 바와 같이, 냉동/공조기는 일반적으로 증발기, 응축기, 압축기, 팽창 밸브 등을 포함하여 구성된다. 1 is a block diagram of a general refrigeration / air conditioner used in the present invention. As shown in FIG. 1, the refrigeration / air conditioner generally comprises an evaporator, a condenser, a compressor, an expansion valve, and the like.
대체 혼합냉매를 개발하기 위하여 본 발명자는 냉동/공조기의 성능을 모사하는 미국 표준 연구소(National Institute of Standards and Technology)에서 개발한 CYCLE-D 프로그램을 사용하였다. 프로그램을 통해 냉동/공조기를 구성하는 요소들 예를 들어 열교환기 및 압축기 등에 대한 열역학 및 열전달 해석을 수행하였고 최종적으로 이 모든 것을 조합하여 사용했다. 프로그램의 정확도를 결정하는 중요 인자 중 하나는 냉매의 물성치이다. 본 프로그램에서는 미국, 일본 등에서 기준으로 삼고 있는 Carnahan-Starling-De Santis(CSD) 상태 방정식을 사용하여 모든 냉매의 물성치를 계산했다. REFPROP으로 알려진 CSD 상태 방정식은 미국 표준 연구소(National Institute of Standards and Technology)에서 개발한 것으로 정확성 및 적용성이 이미 입증되어 전 세계 냉동/공조 관련 유수 기업, 연구소, 대학에서 가장 널리 사용되는 프로그램이다. 이번에 만든 혼합냉매 및 냉동/공조기의 개발 및 실행을 위한 입력 데이터로는 가능한 한 실제 데이터를 사용했다.To develop an alternative mixed refrigerant, the inventors used the CYCLE-D program developed by the National Institute of Standards and Technology, which simulates the performance of a refrigeration / air conditioner. The program conducted thermodynamic and heat transfer analyzes of the components that make up the refrigeration / air conditioner, such as heat exchangers and compressors, and finally used them all in combination. One of the important factors that determine the accuracy of the program is the properties of the refrigerant. In this program, the properties of all refrigerants were calculated using the Carnahan-Starling-De Santis (CSD) state equation, which is the standard in the United States and Japan. The CSD state equation, known as REFPROP, was developed by the National Institute of Standards and Technology and is the most widely used program in leading refrigeration and air conditioning companies, laboratories, and universities worldwide for its proven accuracy and applicability. The actual data was used as input data for the development and execution of the mixed refrigerant and refrigeration / air conditioner.
본 발명자는 냉동/공조기용 대체냉매의 오존파괴지수(ODP)가 반드시 0.0이어야 하며 가능한 한 지구온난화지수(GWP)가 낮아야 한다는 판단 하에 자연냉매인 R1270(프로필렌)과 R290(프로판, Propane) 그리고 R152a(1,1-디플루오로에탄)와 RE170(디메틸에테르, DME)과 R600a(이소부탄, Iso-butane) 중 하나를 혼합하여 기존 냉매를 대체할 수 있게 하였다.The inventors have determined that the ozone depletion index (ODP) of alternative refrigerants for refrigeration / air conditioners should be 0.0 and the global warming potential (GWP) should be as low as possible. Therefore, natural refrigerants R1270 (propylene) and R290 (propane, propane) and R152a (1,1-difluoroethane), RE170 (dimethyl ether, DME) and one of R600a (isobutane, Iso-butane) were mixed to replace the existing refrigerant.
[표 2]는 기존의 CFC502를 사용하는 냉동/공조기의 사용 조건을 적용하여 전산해석 프로그램을 통해 계산한 본 발명에 따른 혼합냉매의 성능지수들을 기존 냉매의 성능지수들과 비교한 결과들을 나타낸 것이고, [표 3]은 기존의 HCFC22를 사용하는 냉동/공조기의 사용 조건을 적용하여 전산해석 프로그램을 통해 계산한 본 발명에 따른 혼합냉매의 성능지수들을 기존 냉매의 성능지수들과 비교한 결과들을 나타낸 것이다. [Table 2] shows the results of comparing the performance index of the mixed refrigerant according to the present invention with the performance index of the existing refrigerant calculated by the computerized analysis program by applying the conditions of the refrigeration / air conditioner using the existing CFC502 , [Table 3] shows the results of comparing the performance index of the mixed refrigerant according to the present invention with the performance index of the conventional refrigerant calculated by the computerized analysis program applying the conditions of use of the refrigeration / air conditioner using the existing HCFC22 will be.
* COP : 성능계수(Coefficient of performance, 총 냉동효과/압축기에 가해진일)* COP: coefficient of performance (Coefficient of performance, total refrigeration effect / day applied to the compressor)
* VC : 체적용량(Volumetric capacity)* VC: Volumetric capacity
* GTD : 온도구배(Gliding temperature difference)* GTD: Grading temperature difference
* Tdis : 압축기 토출온도(Compressor discharge temperature)* T dis : Compressor discharge temperature
* COPdiff : CFC502 대비(표 2), HCFC22 대비(표 3) 성능계수 차이* COP diff : Performance coefficient difference between CFC502 (Table 2) and HCFC22 (Table 3)
* VCdiff : CFC502 대비(표 2), HCFC22 대비(표 3) 체적용량 차이* VC diff : Volume difference between CFC502 (Table 2) and HCFC22 (Table 3)
[표 2] 및 [표 3]을 통해 본 발명예 1 내지 26의 냉매들이 기존의 CFC502나 R404A 혹은 HCFC22나 R407C에 비해 성능계수가 높거나 조금 낮으며 체적용량이 비슷함을 알 수 있다. 현재 상용화되고 있는 여러 혼합냉매의 온도구배가 보통 7℃미만인 점을 감안할 때 이 혼합냉매들의 온도구배는 그보다 작으므로 사용하는 데 문제가 없다. 또한 본 발명예 1 내지 26 냉매들의 압축기 토출 온도 역시 CFC502나 HCFC22와 비슷하거나 조금 높으므로 사용하는 데 문제가 없다.Tables 2 and 3 show that the refrigerants of Examples 1 to 26 of the present invention have higher or slightly lower performance coefficients and similar volume capacities than conventional CFC502 or R404A or HCFC22 or R407C. Given that the temperature gradients of various mixed refrigerants currently commercialized are usually less than 7 ° C., the temperature gradients of these mixed refrigerants are smaller than that, so there is no problem in using them. In addition, the compressor discharge temperature of the refrigerant examples 1 to 26 of the present invention is also similar to or slightly higher than CFC502 or HCFC22, so there is no problem in using it.
본 발명예 1 내지 26의 모든 냉매는 오존파괴지수(ODP)가 0.0으로서 전혀 오존층을 파괴시키지 않으므로 환경 보존 측면에서도 CFC502나 HCFC22보다 훨씬 우수하다. 또 CFC502와 HCFC22의 대체냉매인 R404A나 R407C의 경우 지구 온난화 지수가 높아서 교토 의정서에 의거하여 규제를 받으므로 프로필렌과 프로판, R152a, DME, 이소부탄을 중심으로 혼합냉매를 만들면 HFC 사용량이 줄어들어 지구 온난화도 경감시킬 수 있다.Since all the refrigerants of Examples 1 to 26 of the present invention have an ozone depletion index (ODP) of 0.0 and do not destroy the ozone layer at all, they are much superior to CFC502 and HCFC22 in terms of environmental conservation. In the case of R404A or R407C, which are alternative refrigerants for CFC502 and HCFC22, they are regulated under the Kyoto Protocol due to their high global warming index. You can also reduce.
참고로 상기 기술한 본 발명예들의 조성을 벗어나는 다른 조성에서는 온도 구배가 너무 크든지, 용량과 효율이 너무 낮든지, 압축기 토출 온도가 너무 높아서 실제로 냉동/공조기에 적용하는 데 문제가 있으며, 이하에서는 이를 구체적으로 살펴본다.For reference, other compositions that deviate from the compositions of the present inventions described above, whether the temperature gradient is too large, the capacity and the efficiency are too low, or the compressor discharge temperature is too high, there is a problem in the actual application to the refrigeration / air conditioner, Look specifically.
[ 본 발명예 1, 2 ][Inventive Examples 1 and 2]
본 발명예 1, 2에서 보여지듯이, R152a가 40중량%를 넘어서면 온도구배가 과도하게 커진다. 또한 R1270이 90중량%를 넘어서면 체적용량이 과도하게 커져서 바람직하지 않다.As shown in Examples 1 and 2 of the present invention, when R152a exceeds 40% by weight, the temperature gradient becomes excessively large. In addition, when R1270 exceeds 90% by weight, the volume capacity becomes excessively large, which is not preferable.
[ 본 발명예 3, 4, 5 ][Inventive Example 3, 4, 5]
본 발명예 3, 4, 5에서 보여지듯이, CFC502를 대체하는 혼합냉매에서 R1270이 25중량%를 넘게되면 R1270은 증기압이 높은 물질이므로 혼합냉매의 체적용량이 기존 냉매보다 과도하게 커지므로 기존 냉매에 적합하게 설계된 압축기를 교체해야 한다. R152a가 15중량%를 넘어서면 온도구배가 커지고 압축기 토출온도가 증가하므로 압축기에 부담을 주는 등 바람직하지 않다. As shown in Examples 3, 4 and 5 of the present invention, when R1270 exceeds 25% by weight in a mixed refrigerant replacing CFC502, since R1270 is a substance having a high vapor pressure, the volumetric capacity of the mixed refrigerant is excessively larger than that of the conventional refrigerant. Properly designed compressors must be replaced. If R152a exceeds 15% by weight, the temperature gradient is increased and the compressor discharge temperature is increased.
[ 본 발명예 6, 7, 8, 20, 21 ][Inventive Example 6, 7, 8, 20, 21]
본 발명예 6, 7, 8, 20, 21에서 보여지듯이, RE170이 50중량%를 넘어서면 혼합냉매의 온도구배가 너무 커지고 동시에 체적용량이 너무 작아진다. 따라서 RE170은 50중량%를 넘어서지 않고 동시에 R1270은 적절한 체적용량을 갖기 위해 50중량%이상으로 포함되는 것이 바람직하다.As shown in Examples 6, 7, 8, 20 and 21 of the present invention, when RE170 exceeds 50% by weight, the temperature gradient of the mixed refrigerant becomes too large and at the same time the volume capacity becomes too small. Therefore, RE170 is not more than 50% by weight and at the same time R1270 is preferably included in more than 50% by weight in order to have a suitable volume capacity.
[ 본 발명예 9, 10, 11][Inventive Examples 9, 10, 11]
본 발명예 9, 10, 11에서 보여지듯이, RE170이 10 내지 20중량%의 범위에 있을 경우 온도구배가 1미만이지만, 본 발명예 6,7,8에 의하면 RE170이 증가하는 경우 온도구배가 과도하게 커지므로 R1270과 R290의 포함하는 혼합냉매에서 RE170은 20중량%를 넘어서지 않는 것이 바람직하다. 또한 R1270이 증가할수록 체적용량이 증가하므로 R1270은 20중량%를 넘어서지 않아야 기존 냉매와 유사한 체적용량을 가질 수 있다.As shown in Examples 9, 10 and 11 of the present invention, the temperature gradient is less than 1 when the RE170 is in the range of 10 to 20% by weight, but according to the Examples 6,7 and 8 of the present invention, the temperature gradient is excessive when the RE170 is increased. Since it becomes large, RE170 in the mixed refrigerant containing R1270 and R290 is preferably not more than 20% by weight. In addition, as R1270 increases, the volume capacity increases, so that R1270 must have a volume capacity similar to that of a conventional refrigerant when it does not exceed 20% by weight.
[ 본 발명예 12][Inventive Example 12]
본 발명예 12에서 보여지듯이, R600a, R1270 및 R290으로 이루어진 혼합냉매에서 R600a의 조성비율이 증가하면 온도구배가 크게 증가한다. 따라서 CFC502를 대체하는 혼합냉매는 본 발명예 12에서도 보여지듯이 R600a가 20중량%를 넘어서면 온도구배가 6.7℃보다 더 커지므로 적절치 않다. 또한 R600a를 제외한 나머지 R1270과 R290의 비율이 변화해도 혼합냉매의 체적용량은 적정값을 갖게 된다.As shown in Example 12, when the composition ratio of R600a in the mixed refrigerant consisting of R600a, R1270 and R290 increases, the temperature gradient increases significantly. Therefore, the mixed refrigerant replacing CFC502 is not suitable because the temperature gradient becomes larger than 6.7 ° C when R600a exceeds 20% by weight, as shown in Example 12 of the present invention. In addition, even if the ratio of the remaining R1270 and R290 except for R600a changes, the volumetric capacity of the mixed refrigerant has an appropriate value.
[ 본 발명예 13, 14, 15 ][Inventive Example 13, 14, 15]
본 발명예 13, 14, 15에서 보여지듯이, R152a가 50중량%를 넘어서면 온도구배가 과도하게 커진다. 또한 R1270이 90중량%를 넘어서면 체적용량이 과도하게 커지고 성능계수는 감소하므로 적절치 않다. As shown in Examples 13, 14 and 15 of the present invention, when R152a exceeds 50% by weight, the temperature gradient becomes excessively large. In addition, if the R1270 exceeds 90% by weight, the volume capacity becomes excessively large and the coefficient of performance decreases, which is not appropriate.
[ 본 발명예 16, 17, 18, 19][Inventive Examples 16, 17, 18, 19]
본 발명예 16, 17, 18, 19에서 보여지듯이 R152a가 40중량%를 넘어서면 온도구배가 커진다. R1270이 증가할 수록 성능계수가 감소하므로 R1270은 50중량%를 넘지 않아야 성능계수의 과도한 저하를 방지할 수 있다. 그러나 R1270은 체적용량이 너무 작아지지 않도록 20중량% 이상인 것이 바람직하다.As shown in Examples 16, 17, 18 and 19 of the present invention, when R152a exceeds 40% by weight, the temperature gradient becomes large. As R1270 increases, the coefficient of performance decreases, so that R1270 should not exceed 50% by weight to prevent excessive degradation of the coefficient of performance. However, R1270 is preferably 20% by weight or more so that the volume capacity does not become too small.
[ 본 발명예 22, 23, 24][Inventive Examples 22, 23, 24]
본 발명예 22,23,24에서 보여지듯이, RE170이 15 내지 20중량%의 범위에 있을 경우 온도구배가 1미만이지만, 본 발명예 20,21에 의하면 RE170이 증가하는 경우 온도구배가 과도하게 커지므로 R1270과 R290의 포함하는 혼합냉매에서 RE170은 20중량%를 넘어서지 않는 것이 바람직하다. 또한 본 발명예 22,23,24에서 보여지듯이, R1270이 증가할수록 체적용량이 증가하는데 R1270이 70중량%에서 체적용량은 3596으로 적절한 값을 보이므로 R290과 RE170을 적정량 포함하기 위해서는 R1270은 70중량%를 넘어서지 않는 것이 바람직하다.As shown in Examples 22, 23 and 24 of the present invention, the temperature gradient is less than 1 when RE170 is in the range of 15 to 20% by weight, but according to the Examples 20 and 21 of the present invention, the temperature gradient becomes excessively large when RE170 is increased. Therefore, in the mixed refrigerant containing R1270 and R290, RE170 is preferably not more than 20% by weight. In addition, as shown in Examples 22, 23, and 24 of the present invention, as R1270 increases, the volume capacity increases. R1270 shows an appropriate value of 7096% by volume and a volume capacity of 3596. It is desirable not to exceed%.
[ 본 발명예 25, 26][Inventive Examples 25 and 26]
본 발명예 25,26에서 보여지듯이, R600a, R1270 및 R290으로 이루어진 혼합냉매에서 R600a의 조성비율이 증가하면 온도구배가 크게 증가한다. 따라서 HCFC22를 대체하는 혼합냉매는 본 발명예 25에서도 보여지듯이 R600a가 10중량%를 넘어서지 않는 것이 바람직하다. 또한 R600a를 제외한 나머지 R1270과 R290의 비율이 변화해도 혼합냉매의 체적용량은 적정값을 갖게 된다.As shown in Examples 25 and 26 of the present invention, when the composition ratio of R600a is increased in the mixed refrigerant consisting of R600a, R1270 and R290, the temperature gradient is greatly increased. Therefore, in the mixed refrigerant replacing HCFC22, as shown in Example 25 of the present invention, it is preferable that the R600a does not exceed 10% by weight. In addition, even if the ratio of the remaining R1270 and R290 except for R600a changes, the volumetric capacity of the mixed refrigerant has an appropriate value.
상기한 구성을 갖는 본 발명의 바람직한 실시예에 따른 R502와 R22 대체용 혼합냉매 및 이를 사용한 냉동시스템에 의하면 혼합냉매를 구성하는 물질로서 오존층파괴지수가 0.0이고 지구온난화지수가 매우 작은 프로필렌, 프로판, 1,1-디플루오로에탄, 디메틸에테르 및 이소부탄을 사용하므로 냉매의 유출이 있거나 냉매를 폐기하는 경우에도 지구의 오존층파괴와 지구온난화를 방지할 수 있는 현저한 효과가 있다.According to the mixed refrigerant for R502 and R22 and the refrigeration system using the same according to a preferred embodiment of the present invention having the above-described configuration as a material constituting the mixed refrigerant, ozone layer destruction index of 0.0 and very low global warming index of propylene, propane, Since 1,1-difluoroethane, dimethyl ether and isobutane are used, there is a remarkable effect of preventing the global ozone layer destruction and global warming even when the refrigerant is leaked or discarded.
또한 본 발명에 따른 혼합냉매는 프로필렌, 프로판, 1,1-디플루오로에탄, 디메틸에테르 및 이소부탄을 적절한 조성으로 혼합하여 혼합냉매의 증기압이나 체적용량이 기존 사용되던 냉매인 R502 또는 R22 냉매와 유사하도록 하였기 때문에 압축기를 교체하거나 기존 냉동시스템을 개조하지 않고 직접 적용할 수 있으므로 시간적 경제적 비용이 감소되는 효과가 있다.In addition, the mixed refrigerant according to the present invention is mixed with propylene, propane, 1,1-difluoroethane, dimethyl ether and isobutane in an appropriate composition to the refrigerant R502 or R22, which is a refrigerant in which the vapor pressure or volumetric capacity of the mixed refrigerant is conventionally used. Since it is similar, it can be applied directly without replacing the compressor or modifying the existing refrigeration system, thereby reducing the time and economic cost.
본 발명의 혼합냉매는 적절한 조성의 혼합에 의해 온도구배가 매우 작게되므로 냉매의 상변화에 따른 냉매압력의 변동이 거의 없어서 냉동시스템을 안정적으로 사용할 수 있고, 냉매 유출시의 조성 분리 현상이 방지되는 효과가 있다.In the mixed refrigerant of the present invention, since the temperature gradient is very small by mixing the proper composition, there is almost no change in the refrigerant pressure due to the phase change of the refrigerant, so that the refrigeration system can be used stably, and the separation of the composition during the outflow of the refrigerant is prevented. It works.
비록 본 발명이 상기 언급된 바람직한 실시예와 관련하여 설명되어졌지만, 발명의 요지와 범위로부터 벗어남이 없이 다양한 수정이나 변형을 하는 것이 가능하다. 따라서 첨부된 특허청구의 범위는 본 발명의 요지에서 속하는 이러한 수정이나 변형을 포함할 것이다.Although the present invention has been described in connection with the above-mentioned preferred embodiments, it is possible to make various modifications or variations without departing from the spirit and scope of the invention. Accordingly, the appended claims will cover such modifications and variations as fall within the spirit of the invention.
도 1은 본 발명에서 사용한 일반적인 냉동/공조기의 구성도이다.1 is a block diagram of a general refrigeration / air conditioner used in the present invention.
* 도면의 주요부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings
Qc: 응축기에서의 열 흐름 방향(냉매→공기)Qc: direction of heat flow in the condenser (from refrigerant to air)
Qe: 증발기에서 열 흐름 방향(공기→냉매)Qe: Heat flow direction from the evaporator (air to refrigerant)
TS1: 증발기 공기 입구온도, TS7: 증발기 공기 출구온도TS1: evaporator air inlet temperature, TS7: evaporator air outlet temperature
TS3: 응축기 공기 출구온도, TS6: 응축기 공기 입구온도TS3: condenser air outlet temperature, TS6: condenser air inlet temperature
Evaporator: 증발기, Compressor: 압축기Evaporator: Compressor: Compressor
Condenser: 응축기, Expansion Valve: 팽창밸브Condenser: Condenser, Expansion Valve: Expansion Valve
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020050006144A KR100540279B1 (en) | 2005-01-24 | 2005-01-24 | R502 and r22 substitute mixed refrigerant and refrigeration system using thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020050006144A KR100540279B1 (en) | 2005-01-24 | 2005-01-24 | R502 and r22 substitute mixed refrigerant and refrigeration system using thereof |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020040066984A Division KR100492171B1 (en) | 2004-08-25 | 2004-08-25 | R502 and r22 substitute mixed refrigerant and refrigeration system using thereof |
Publications (1)
Publication Number | Publication Date |
---|---|
KR100540279B1 true KR100540279B1 (en) | 2005-12-29 |
Family
ID=37307035
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020050006144A KR100540279B1 (en) | 2005-01-24 | 2005-01-24 | R502 and r22 substitute mixed refrigerant and refrigeration system using thereof |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR100540279B1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN116162443A (en) * | 2023-02-08 | 2023-05-26 | 珠海格力电器股份有限公司 | Mixed environment-friendly refrigeration working medium, refrigeration device and application |
-
2005
- 2005-01-24 KR KR1020050006144A patent/KR100540279B1/en not_active IP Right Cessation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN116162443A (en) * | 2023-02-08 | 2023-05-26 | 珠海格力电器股份有限公司 | Mixed environment-friendly refrigeration working medium, refrigeration device and application |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR100976448B1 (en) | Near azeotropic refrigerant mixtures | |
US7459101B2 (en) | Environmentally friendly alternative refrigerant for HCFC-22 | |
KR100492169B1 (en) | R502 and r22 substitute mixed refrigerant and refrigeration system using thereof | |
KR101139377B1 (en) | Near azeotropic refrigerant mixtures | |
KR100969257B1 (en) | Near azeotropic refrigerant mixtures | |
KR100261459B1 (en) | Composition of refrigerant mixtures for refrigerator/ air conditioner | |
KR100492171B1 (en) | R502 and r22 substitute mixed refrigerant and refrigeration system using thereof | |
KR100540279B1 (en) | R502 and r22 substitute mixed refrigerant and refrigeration system using thereof | |
KR100540285B1 (en) | R12 and r22 substitute mixed refrigerant and refrigeration system using thereof | |
KR100540281B1 (en) | R502 and r22 substitute mixed refrigerant and refrigeration system using thereof | |
KR100540282B1 (en) | R502 and r22 substitute mixed refrigerant and refrigeration system using thereof | |
KR100499259B1 (en) | R12 substitute mixed refrigerant and refrigeration system using thereof | |
KR100492174B1 (en) | R12 or r22 substitute mixed refrigerant and refrigeration system using thereof | |
KR100540280B1 (en) | R502 and r22 substitute mixed refrigerant and refrigeration system using thereof | |
KR100492173B1 (en) | R502 and r22 substitute mixed refrigerant and refrigeration system using thereof | |
KR100540278B1 (en) | R502 substitute mixed refrigerant and refrigeration system using thereof | |
KR100540283B1 (en) | R12 or r22 substitute mixed refrigerant and refrigeration system using thereof | |
KR100492172B1 (en) | R502 and r22 substitute mixed refrigerant and refrigeration system using thereof | |
KR100540284B1 (en) | R12 or r22 substitute mixed refrigerant and refrigeration system using thereof | |
KR100492170B1 (en) | R502 substitute mixed refrigerant and refrigeration system using thereof | |
KR100492175B1 (en) | R12 and r22 substitute mixed refrigerant and refrigeration system using thereof | |
KR100633732B1 (en) | R22 substitute mixed refrigerant | |
KR100540286B1 (en) | R12 substitute mixed refrigerant and refrigeration system using thereof | |
KR100969256B1 (en) | Near azeotropic refrigerant mixtures | |
KR100969258B1 (en) | Near azeotropic refrigerant mixtures |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A107 | Divisional application of patent | ||
A201 | Request for examination | ||
A302 | Request for accelerated examination | ||
E902 | Notification of reason for refusal | ||
E902 | Notification of reason for refusal | ||
E701 | Decision to grant or registration of patent right | ||
GRNT | Written decision to grant | ||
FPAY | Annual fee payment |
Payment date: 20100115 Year of fee payment: 5 |
|
LAPS | Lapse due to unpaid annual fee |