KR20050081866A - Waste heat recovery system - Google Patents
Waste heat recovery system Download PDFInfo
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- KR20050081866A KR20050081866A KR1020040110905A KR20040110905A KR20050081866A KR 20050081866 A KR20050081866 A KR 20050081866A KR 1020040110905 A KR1020040110905 A KR 1020040110905A KR 20040110905 A KR20040110905 A KR 20040110905A KR 20050081866 A KR20050081866 A KR 20050081866A
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- 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
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
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- 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
- F25B27/00—Machines, plants or systems, using particular sources of energy
- F25B27/02—Machines, plants or systems, using particular sources of energy using waste heat, e.g. from internal-combustion engines
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- 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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
- F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
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- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
본원발명은 제 1 열교환기, 제 2 열교환기, 팽창밸브 및, 압축기를 구비하는 히트펌프와, 수원으로부터 공급되는 물과 사용후 배출되는 폐수를 열교환시키기 위한 폐열회수용 열교환기를 포함하고, 수원에서 공급되는 물이 상기 폐열회수용 열교환기에서 1차 열교환되고, 이후 상기 히트펌프의 제 1 열교환기에서 2차 열교환되어 사용부로 공급되며, 상기 폐수가 상기 폐열회수용 열교환기에서 1차 열교환되고, 이후 상기 히트펌프의 제 2 열교환기에서 2차 열교환되어 배출되는 히트펌프식 폐열회수 시스템을 제공한다.The present invention includes a heat pump having a first heat exchanger, a second heat exchanger, an expansion valve, and a compressor, and a heat exchanger for waste heat recovery for heat-exchanging wastewater discharged from water and used water from a water source. The water to be supplied is first heat exchanged in the waste heat recovery heat exchanger, and then is secondly heat exchanged in the first heat exchanger of the heat pump to be supplied to the use part, and the waste water is first heat exchanged in the waste heat recovery heat exchanger, Thereafter, a heat pump waste heat recovery system discharged by secondary heat exchange in a second heat exchanger of the heat pump is provided.
이러한 본원발명의 히트펌프식 폐열회수 시스템에 의하여 열 효율이 높고 에너지 소비율이 낮은 히트펌프식 폐열회수 시스템을 제공할 수 있게 되어 관련업종의 원가절감을 실현할 수 있게 된다The heat pump type waste heat recovery system of the present invention can provide a heat pump type waste heat recovery system with high heat efficiency and low energy consumption, thereby realizing cost reduction of related industries.
Description
본원발명은 히트펌프식 폐열회수 시스템에 관한 것으로서, 보다 상세하게는 물, 해수, 담수 등과 같은 액체를 폐열을 이용하여 가열 또는 냉각시켜 필요한 온도에서 사용한 후 배출시키는 히트펌프식 폐열회수 시스템에 관한 것이다.The present invention relates to a heat pump type waste heat recovery system, and more particularly, to a heat pump type waste heat recovery system for discharging a liquid such as water, sea water, fresh water, etc. using waste heat and then discharging it at a required temperature. .
종래에 있어서, 히트펌프식 폐열회수 시스템은 도 1에 도시된 바와 같이 응축기(2), 압축기(3), 증발기(4), 교축밸브(5)로 이루어진 히트펌프(1), 액체를 공급하는 공급부(7), 상기 히트펌프(1)에 의해 가열 또는 냉각된 액체가 사용되는, 예를 들어 목욕탕이나 양식용 수조 등과 같은, 사용부(6) 및, 사용부(6)에서 사용된 액체가 배출되는 배출부(8)로 구성되어 있다.Conventionally, the heat pump waste heat recovery system is a heat pump (1) consisting of a condenser (2), a compressor (3), an evaporator (4), a throttling valve (5), as shown in FIG. The supply part 7, the liquid heated or cooled by the heat pump 1, for example, the use part 6, such as a bath or aquaculture tank, and the liquid used in the use part 6 are used. It is comprised by the discharge part 8 discharged.
이와 같은 종래기술에 따른 히트펌프식 폐열회수 시스템이 액체를 가열하기 위해 사용되는 방식은 다음과 같다.The heat pump type waste heat recovery system according to the related art is used to heat a liquid as follows.
먼저, 공급부(7)에서 공급되는 액체가 히트펌프(1)의 응축기(2)를 통과하면서 히트펌프(1)의 열교환 매체로부터 열을 공급받고, 이와 같이 가열된 액체는 사용부(6)로 공급되어 원하는 용도로 사용된다. 사용부(6)에서 사용된 후 배출되는 폐수는 증발기(4)를 거치면서, 마찬가지로, 히트펌프(1)의 열교환 매체로 열을 공급하고, 이후 배출부(8)를 통해 외부로 배출된다.First, the liquid supplied from the supply unit 7 receives heat from the heat exchange medium of the heat pump 1 while passing through the condenser 2 of the heat pump 1, and the heated liquid is supplied to the use unit 6. It is supplied and used for the intended purpose. The wastewater discharged after being used in the use portion 6 passes through the evaporator 4 and likewise supplies heat to the heat exchange medium of the heat pump 1, and is then discharged to the outside through the discharge portion 8.
한편 종래기술에 따른 히트펌프식 폐열회수 시스템이 액체를 냉각하기 위해 사용되는 경우에는, 상기한 방식과 유사하게, 공급부에서 공급되는 액체가 히트펌프의 증발기를 통과하면서 히트펌프의 열교환 매체와 열교환을 하여 냉각되고, 이와 같이 냉각된 액체는 사용부로 공급되어 원하는 용도로 사용된다. 그리고, 사용부에서 사용된 후 배출되는 폐수는 응축기를 거치면서, 마찬가지로, 히트펌프의 열교환 매체와 열교환을 하여 가열되고, 이후 배출부를 통해 외부로 배출된다.On the other hand, when the heat pump type waste heat recovery system according to the prior art is used to cool the liquid, similarly to the above-described method, the liquid supplied from the supply passes through the evaporator of the heat pump to exchange heat with the heat exchange medium of the heat pump. The liquid thus cooled is supplied to the use portion and used for the desired purpose. Then, the wastewater discharged after being used in the use part is heated through heat exchange with the heat exchange medium of the heat pump while passing through the condenser, and is then discharged to the outside through the discharge part.
그러나 이러한 종래의 히트펌프식 폐열회수 시스템에서는 버려지는 폐수가 단지 증발기(또는 응축기)에서만 열교환을 함으로써 폐수가 가지고 있는 열에너지의 적은 부분만을 회수할 뿐이다. 따라서 후술되는 바와 같이 전체 시스템의 열 효율이 낮아 액체를 가열 또는 냉각시키기 위해 소요되는 에너지가 높게 된다는 단점을 가지고 있다. However, in this conventional heat pump type waste heat recovery system, the waste water that is discarded only heats only in the evaporator (or condenser) to recover only a small part of the thermal energy of the waste water. Therefore, as described below, the thermal efficiency of the entire system is low, so that the energy required for heating or cooling the liquid is high.
특히, 해수나 담수를 사용하여 어패류 등을 양식하는 양식산업에 있어서 이러한 문제점은 더욱 두드러지게 된다.In particular, this problem becomes more prominent in the aquaculture industry which uses seawater or freshwater to culture fish and shellfish.
일반적으로 양식에 적합한 온도는, 어종에 따라 다르지만, 15℃ ~ 20℃ 가 대부분이다. 그러나 이에 사용되는 해수나 담수의 온도는 계절에 따라 크게 변화하여 겨울에는 0℃ ~ 4℃로부터 여름에는 26℃ ~ 32℃까지 변화폭이 큰데, 수온이 너무 낮으면 양식개체가 자라지 않고 수온이 너무 높으면 양식개체가 집단으로 폐사하는 등 양식산업에 악영향을 미치고 있다. 이에 따라 양식업체에서는 보일러나 냉각장치를 설치하여 수온을 맞추기도 하지만 설치비용이 비쌀 뿐만 아니라, 상기한 바와 같은 낮은 열효율성으로 인해 온도를 유지하는데 드는 에너지 비용이 막대하여 원가부담이 매우 커지게 된다.In general, the temperature suitable for aquaculture depends on the species, but most are between 15 ° C and 20 ° C. However, the temperature of seawater or freshwater used greatly varies according to the season, and the change ranges from 0 ℃ to 4 ℃ in winter to 26 ℃ to 32 ℃ in summer. If the water temperature is too low, the cultured object does not grow and the water temperature is too high. It is adversely affecting the aquaculture industry, such as the death of aquaculture objects in groups. As a result, aquaculture companies install boilers or cooling devices to adjust the water temperature, but the installation cost is high, and the cost of energy is very high due to the low thermal efficiency as described above. .
본원발명은 상기한 바와 같은 종래기술의 히트펌프식 폐열회수 시스템의 높은 에너지 소비율 및 열 효율을 간단한 구조에 의하여 개선함으로써, 열 효율이 높고 에너지 소비율이 낮은 히트펌프식 폐열회수 시스템을 제공하는 것을 목적으로 하고 있다.The present invention aims to provide a heat pump type waste heat recovery system with high heat efficiency and low energy consumption rate by improving the high energy consumption rate and heat efficiency of the heat pump type waste heat recovery system of the prior art as described above by a simple structure. I am doing it.
상기한 바와 같은 본원발명의 목적은, 제 1 열교환기, 제 2 열교환기, 팽창밸브 및, 압축기를 구비하는 히트펌프와, 수원으로부터 공급되는 물과 사용후 배출되는 폐수를 열교환시키기 위한 폐열회수용 열교환기를 포함하고, 수원에서 공급되는 물이 상기 폐열회수용 열교환기에서 1차 열교환되고, 이후 상기 히트펌프의 제 1 열교환기에서 2차 열교환되어 사용부로 공급되며, 상기 폐수가 상기 폐열회수용 열교환기에서 1차 열교환되고, 이후 상기 히트펌프의 제 2 열교환기에서 2차 열교환되어 배출되는 히트펌프식 폐열회수 시스템에 의하여 달성된다.An object of the present invention as described above is a waste heat recovery for heat exchange between a heat pump having a first heat exchanger, a second heat exchanger, an expansion valve, and a compressor, and water supplied from a water source and waste water discharged after use. And a heat exchanger, wherein water supplied from a water source is firstly heat exchanged in the waste heat recovery heat exchanger, and then is secondly heat exchanged in the first heat exchanger of the heat pump to be supplied to the use part, and the waste water is exchanged for the waste heat recovery heat exchanger. It is achieved by a heat pump waste heat recovery system which is first heat exchanged in the air, and then discharged by secondary heat exchange in the second heat exchanger of the heat pump.
이하에서는, 도면을 참조하여 본원발명을 보다 상세히 설명한다.Hereinafter, with reference to the drawings will be described the present invention in more detail.
도 2에는 본원발명에 따른 공급액체 가열용 히트펌프식 폐열회수 시스템이 도시되어 있다.2 is a heat pump waste heat recovery system for supplying a heating liquid according to the present invention.
공급부(7)에서 공급되는 공급액체는 폐열회수용 열교환기(10)를 통과하면서 사용부(8)에서 배출되는 폐수와 열교환하여 1차 가열되고, 이후 응축기(2), 압축기(3), 증발기(4), 및 교축밸브(5)로 이루어진 히트펌프(1)의 응축기(2)를 통과하면서 열교환 매체와 열교환하여 2차 가열된다. 이와 같이 가열된 공급액체는 공급용 관로를 통해 사용부(6)로 공급된다.The feed liquid supplied from the supply unit 7 is first heated by heat exchange with wastewater discharged from the use unit 8 while passing through the heat exchanger 10 for waste heat recovery, and then condenser 2, compressor 3, and evaporator. (4) and the second heat is exchanged with the heat exchange medium while passing through the condenser (2) of the heat pump (1) consisting of the throttle valve (5). The heated supply liquid is supplied to the use part 6 through a supply pipe.
한편, 사용부(6)에서 배출되는 폐수는 폐열회수용 열교환기(10)를 통과하면서 공급부(7)에서 공급되는 공급액체와 열교환하여 1차 냉각되고, 이후, 히트펌프(1)의 증발기(4)를 통과하면서 열교환 매체와 열교환하여 2차 냉각되어 배출부(8)를 통해 외부로 배출된다.Meanwhile, the wastewater discharged from the use portion 6 is first cooled by heat exchange with the supply liquid supplied from the supply portion 7 while passing through the heat exchanger 10 for waste heat recovery, and then the evaporator of the heat pump 1 While passing through 4) it is heat-exchanged with the heat exchange medium to be secondarily cooled and discharged to the outside through the discharge section 8.
즉, 본원발명에 따른 히트펌프식 폐열회수 시스템에서는 공급액체와 폐수가 각각 응축기와 증발기를 통과하기에 앞서 폐열회수용 열교환기에서 1차적으로 열교환을 하게 함으로써 폐수가 가지고 있는 열에너지를 최대한 이용할 수 있게 한다.In other words, in the heat pump type waste heat recovery system according to the present invention, before the supply liquid and the waste water pass through the condenser and the evaporator, the heat exchange is performed in the waste heat recovery heat exchanger to make the most of the heat energy of the waste water. do.
이와 같은 본원발명의 높은 열효율은, 다음과 같이 종래의 폐열회수 시스템(도 1)과 본원발명에 따른 폐열회수 시스템(도 2)의 에너지 소비율을 비교해 봄으로써 더욱 명확해지게 된다.Such high thermal efficiency of the present invention will become clearer by comparing the energy consumption rates of the conventional waste heat recovery system (FIG. 1) and the waste heat recovery system (FIG. 2) according to the present invention as follows.
<조건><Condition>
공급액체 : 냉수Supply liquid: cold water
공급 및 배출 수량 : 10000kg/h Supply and discharge quantity: 10000kg / h
공급수의 초기온도 : 10℃Initial temperature of feed water: 10 ℃
사용온도 : 20℃Operating Temperature: 20 ℃
사용부의 배출온도 : 20℃Discharge temperature of used part: 20 ℃
히트펌프의 성능계수(cop) : 5Heat Coefficient of Performance (cop): 5
폐열회수용 열교환기를 통과한 공급수의 온도 : 18℃Temperature of feed water passed through waste heat recovery heat exchanger: 18 ℃
폐열회수용 열교환기를 통과한 폐수의 온도 : 12℃Temperature of waste water passing through waste heat recovery heat exchanger: 12 ℃
상기와 같은 조건하에서 종래기술에 따른 폐열회수 시스템의 에너지 소비율을 계산해보면, When calculating the energy consumption rate of the waste heat recovery system according to the prior art under the above conditions,
E = Q/cop = cmΔT/cop E = Q / cop = cmΔT / cop
= (1 kcal/kg℃)(10000kg/h)(20℃ -10℃)/5 = 20,000(kcal/h) = (1 kcal / kg ° C) (10000 kg / h) (20 ° C -10 ° C) / 5 = 20,000 (kcal / h)
즉, 시간당 20,000kcal의 에너지를 필요로 하게 된다.That is, it requires 20,000 kcal of energy per hour.
그러나, 본원발명에 따른 폐열회수 시스템에서는,However, in the waste heat recovery system according to the present invention,
E = Q/cop = cmΔT/cop E = Q / cop = cmΔT / cop
= (1 kcal/kg℃)(10000kg/h)(20℃ -18℃)/5 = 4,000(kcal/h) = (1 kcal / kg ° C) (10000 kg / h) (20 ° C -18 ° C) / 5 = 4,000 (kcal / h)
즉, 시간당 4,000kcal의 에너지를 필요로 하게 되어, 종래방식에 비해 소비되는 에너지가 1/5로 줄게 된다. In other words, it requires an energy of 4,000 kcal per hour, reducing the energy consumed by 1/5 compared with the conventional method.
비록, 공급액체가 가열되는 경우에 대해서만 설명하였지만, 냉각되는 경우에도 이와 유사한 결과가 도출될 수 있음은 명백하다.Although only the case where the feed liquid is heated is described, it is obvious that similar results can be obtained even when the feed liquid is cooled.
이와 같이 본원발명에 따른 폐열회수 시스템은 열효율이 종래기술에 비해 월등하여 에너지 소비를 절감할 수 있어서 급탕소요가 많은 목욕탕, 숙박업소, 수영장 등에 사용될 수 있으며, 또한 수온조절이 필요한 수산 양식업, 염색업등에 적용될 수 있다.As such, the waste heat recovery system according to the present invention can be used in bathrooms, lodgings, swimming pools, etc., where hot water is required, as the thermal efficiency is superior to that of the prior art, thereby reducing energy consumption. And the like.
도 3에는 본원발명에 따른 히트펌프식 폐열회수 시스템을 목욕탕에 구현한 실시예가 도시되어 있다.Figure 3 shows an embodiment of implementing a heat pump waste heat recovery system according to the present invention in the bath.
목욕탕(130)에 소요되는 물을 공급하기 위하여 10℃정도의 냉수가 저장된 급수조(100)와, 상기 급수조(100)에 저장된 냉수를 공급받아 상기 목욕탕(103)으로부터 폐수 여과기(140)를 거쳐 배출되는 35℃정도의 폐수와 열교환시켜 상기 냉수를 30℃정도로 가열시키는 폐열회수용 열교환기(150)와, 냉수밸브(105)를 개방하여 상기 폐열회수용 열교환기(150)를 통과한 30℃정도의 물을 상기 목욕탕(103)으로 공급하는 냉수관로(102)와, 상기 폐열회수용 열교환기를 통과한 30℃정도의 물을 70℃정도의 온수로 가열시키는 히트펌프(110)와, 상기 히트펌프(110)에서 가열된 온수를 저장하는 온수 저장조(120)와, 온수밸브(106)를 개방하여 상기 온수저장조(120)에 저장된 70℃정도의 온수를 상기 목욕탕(130)으로 공급하는 온수관로(104)로 구성된다.In order to supply the water required for the bathroom 130, the water supply tank 100 stored with cold water at about 10 ° C. and the cold water stored in the water supply tank 100 are supplied to the wastewater filter 140 from the bathroom 103. Waste heat recovery heat exchanger 150 for heat-exchanging the waste water discharged through 35 ° C. to heat the cold water to 30 ° C., and 30 having passed through the waste heat recovery heat exchanger 150 by opening the cold water valve 105. A cold water pipe (102) for supplying water at about ℃ to the bath (103), a heat pump (110) for heating water at about 30 degrees Celsius passing through the waste heat recovery heat exchanger with water at about 70 degrees Celsius, and Hot water storage tank 120 for storing the hot water heated by the heat pump 110, and hot water valve 106 to open the hot water of about 70 ℃ stored in the hot water storage tank 120 to supply the bath 130 It consists of a conduit 104.
한편, 상기 히트펌프(110)는 응축기(111), 증발기(112), 압축기(113) 및, 팽창밸브(114)로 구성되어, 상기의 폐열회수용 열교환기(150)를 통과한 15℃정도의 폐수는 증발기(112)를 통과하면서 열교환 매체와 열교환을 일으켜 3℃ ~ 10℃로 냉각된 다음 배출되고, 증발기(212)를 통과한 열교환 매체는 압축기(113)에 의하여 압축된 후, 상기 응축기(111)를 통과하면서 상기 폐열회수용 열교환기(150)로부터 공급되는 30℃정도의 물을 70℃정도의 온수가 되도록 가열한 다음, 팽창밸브(114)를 거쳐 증발기(112)로 순환된다.On the other hand, the heat pump 110 is composed of a condenser 111, an evaporator 112, a compressor 113, and an expansion valve 114, about 15 ℃ passed through the waste heat recovery heat exchanger (150). The wastewater of the heat exchanger passes through the evaporator 112, generates heat exchange with the heat exchange medium, is cooled to 3 ° C. to 10 ° C., and then discharged, and the heat exchange medium passed through the evaporator 212 is compressed by the compressor 113, and then While passing through the 111, the water of about 30 ° C supplied from the waste heat recovery heat exchanger 150 is heated to be about 70 ° C of hot water, and then circulated to the evaporator 112 through the expansion valve 114.
본 발명의 제 2 실시예가 도 4에 도시되어 있다.A second embodiment of the invention is shown in FIG.
본 발명의 제 2 실시예에 따른 히트펌프식 폐열회수 시스템은 도 3에 도시된 바와 같이, 목욕탕(260)에서 소요되는 물을 공급하는 급수조(211) 및 급수펌프(212)로 이루어진 급수부(210)와, 목욕탕(260)으로부터 배출되는 폐수의 열을 회수하는 제 1, 2 폐열회수용 열교환기(221,222) 와, 증기발생부(230)와, 상기 증기발생부(230)에서 발생된 증기를 공급받아 물을 가열하는 열교환기(240)와 ,상기 열교환기(240)에서 가열된 온수를 저장하여 목욕탕(260)으로 공급하는 온수저장조(250)와, 냉수가 저장된 냉수저장조(280)와, 압축기(291), 응축기(292), 팽창밸브(293) 및, 증발기(294)로 이루어져 열교환 매체가 순환되는 히트펌프(290)로 구성된다.Heat pump type waste heat recovery system according to a second embodiment of the present invention, as shown in Figure 3, the water supply consisting of a water supply tank 211 and a water supply pump 212 for supplying the water required in the bathroom 260 And the first and second waste heat recovery heat exchangers 221 and 222 for recovering heat of the wastewater discharged from the bath 260, the steam generator 230, and the steam generator 230. A heat exchanger 240 for receiving water and supplying steam, and a hot water storage tank 250 for storing hot water heated by the heat exchanger 240 and supplying it to the bathroom 260, and a cold water storage tank 280 for storing cold water. And a heat pump 290 consisting of a compressor 291, a condenser 292, an expansion valve 293, and an evaporator 294, through which a heat exchange medium is circulated.
한편, 상기 급수부(210)로부터 공급된 5℃정도의 냉수는 관로(L1), 밸브(V1), 밸브(V2)를 통과하여 제 1 폐열회수용 열교환기(221)로 유입되고, 목욕탕(260)으로부터 배출되는 34℃정도의 폐수는 펌프(P2)의 작동으로 제 1, 2 여과기(271,272)를 통과한 다음 제 1 폐열회수용 열교환기(221)로 유입되어 상호 열교환을 일으킨다. 이와 같은 열교환과정을 통해 상기 급수부(210)로부터 공급된 냉수는 30℃정도로 가열된 후 밸브(V3)를 통과하고, 폐수는 제 2 폐열회수용 열교환기(222)로 유입된다.On the other hand, the cold water of about 5 ℃ supplied from the water supply unit 210 passes through the pipe line (L1), valve (V1), valve (V2) flows into the first waste heat recovery heat exchanger (221), the bath ( Waste water at about 34 ° C. discharged from 260 passes through the first and second filters 271 and 272 by the operation of the pump P2 and then flows into the first waste heat recovery heat exchanger 221 to cause mutual heat exchange. Through such a heat exchange process, the cold water supplied from the water supply unit 210 is heated to about 30 ° C., passes through the valve V3, and the waste water is introduced into the second waste heat recovery heat exchanger 222.
또한, 제 2 폐열회수용 열교환기(222)로 유입된 폐수는, 펌프(P3)의 작동으로 냉수조(280)로부터 밸브(V14)를 거쳐 공급된 냉수와 열교환을 일으킨 다음 정화조(283)로 배출되고, 제 2 폐열회수용 열교환기(222)에서 데워진 냉수는 밸브(V15)를 거쳐 증발기(294)로 유입되어 열교환 매체와 열교환된 다음 냉각되어 냉수조(280)로 귀환된다.In addition, the wastewater introduced into the second waste heat recovery heat exchanger 222 generates heat exchange with the cold water supplied from the cold water tank 280 through the valve V14 by the operation of the pump P3 and then to the septic tank 283. The cold water discharged and heated in the second waste heat recovery heat exchanger 222 flows into the evaporator 294 through the valve V15, exchanges heat with the heat exchange medium, and then cools and returns to the cold water tank 280.
한편, 냉수조(280)에 저장된 냉수는 펌프(P4) 및 펌프(P5)를 작동시켜 냉탕(281)으로 공급되거나 냉방설비(282)로 공급될 수 있다.Meanwhile, the cold water stored in the cold water tank 280 may be supplied to the cold bath 281 or the cooling facility 282 by operating the pump P4 and the pump P5.
상기 제 1 폐열회수용 열교환기(221)를 통과한 30℃정도의 물의 일부는 밸브(V3) 및 제 1 냉수관로(L21)를 통하여 목욕탕(260)으로 공급되고, 일부는 밸브(V6), 관로(L22), 밸브(V8), 펌프(P1) 및 밸브(V11)를 통과하여 열교환기(240)에서 50℃정도로 가열된 후 밸브(V12), 관로(L4)를 통과하여 온수저장조(250)에 저장된다. 온수저장조(250)에 저장된 50℃정도의 온수는 온수관로(L5)를 통하여 목욕탕(260)으로 공급된다.A part of the water having a temperature of about 30 ° C. passing through the first waste heat recovery heat exchanger 221 is supplied to the bathroom 260 through the valve V3 and the first cold water pipe L21, and a part of the valve V6, After passing through the pipe line (L22), valve (V8), pump (P1) and valve (V11) is heated to about 50 ℃ in the heat exchanger (240) and passes through the valve (V12), pipe line (L4) hot water storage tank 250 ) The hot water of about 50 ° C. stored in the hot water storage tank 250 is supplied to the bath 260 through the hot water pipe L5.
한편, 상기 급수부(210)로부터 공급된 5℃정도의 냉수는 필요에 따라 상기 제 1 폐열회수용 열교환기(221)를 통과하지 않고 밸브(V1) 및 제 2 냉수관로(L6)를 통하여 목욕탕(60)으로 직접 공급되게 할 수 있다.On the other hand, the cold water of about 5 ° C supplied from the water supply unit 210 as necessary, without passing through the first waste heat recovery heat exchanger 221 through the valve (V1) and the second cold water pipe (L6) Can be fed directly to (60).
또한, 제 1 폐열회수용 열교환기(221)를 통과한 물은 응축기(292)를 통과하지 않고 밸브(V7)를 통하여 직접 열교환기(240)로 공급될 수 있으며, 펌프(P1)를 통과한 물은 열교환기(240)를 통과하지 않고 밸브(V1)를 거쳐 온수저장조(250)로 직접 유입될 수도 있다.In addition, the water passing through the first waste heat recovery heat exchanger 221 may be directly supplied to the heat exchanger 240 through the valve V7 without passing through the condenser 292, and may pass through the pump P1. The water may flow directly into the hot water storage tank 250 through the valve V1 without passing through the heat exchanger 240.
또한, 온수저장조(250)에 저장된 온수는 밸브(V10)를 통하여 열교환기(240)로 공급되어 재가열될 수도 있다.In addition, the hot water stored in the hot water storage tank 250 may be supplied to the heat exchanger 240 through the valve (V10) to be reheated.
또한, 냉수조(280)에 저장된 냉수는 밸브(V16)를 통하여 증발기(294)로 직접 공급될 수 있다.In addition, the cold water stored in the cold water tank 280 may be directly supplied to the evaporator 294 through the valve (V16).
한편, 상기 밸브(V4), 밸브(V7), 밸브(V10), 밸브(V13), 밸브(V16)는 특별히 개방할 필요가 없는 경우에는 통상적으로 폐쇄되어 있다.On the other hand, the valve V4, the valve V7, the valve V10, the valve V13, and the valve V16 are normally closed when there is no need to open the valve.
또한, 본원발명에 따른 히트펌프식 폐열회수 시스템은 육상에 양식용 수조를 설치하고, 해수 또는 담수를 유입시켜 어패류를 양식하는 양식업에서도 사용가능하다.In addition, the heat-pumped waste heat recovery system according to the present invention can be used in aquaculture industry in which aquaculture tanks are installed on land, and seawater or freshwater is introduced to culture fish and shellfish.
도 5에는 본원발명에 따른 히트펌프식 폐열회수 시스템을 어패류 등의 양식장에 구현한 실시예가 도시되어 있다.Figure 5 shows an embodiment of the heat pump type waste heat recovery system according to the present invention implemented in aquaculture farms, such as shellfish.
이러한 양식장용 폐열회수 시스템은 양식에 사용되는 해수 또는 담수를 공급하기 위한 펌프(P30), 양식용 수조(320)로부터 폐수를 배출시키기 위한 펌프(P31), 양식용 수조(320)로부터 배출되는 폐수의 열을 회수하거나 상기 폐수로 열을 방출시키기 위한 폐열회수용 열교환기(310), 4방향 전환밸브(340), 그리고 응축기(302), 증발기(304), 압축기(303), 및 팽창밸브(305)로 이루어져 열교환 매체가 순환되는 히트펌프(301)로 구성된다.Such a farm waste heat recovery system is a pump (P30) for supplying seawater or fresh water used for aquaculture, a pump (P31) for discharging wastewater from the aquaculture tank 320, wastewater discharged from the aquaculture tank 320 Waste heat recovery heat exchanger 310, a four-way switch valve 340, and a condenser 302, an evaporator 304, a compressor 303, and an expansion valve for recovering heat or releasing heat into the wastewater. 305 is composed of a heat pump 301 through which the heat exchange medium is circulated.
먼저, 겨울철의 경우 약 3℃ 정도의 해수가 펌프(P30)에 의해 관로(L31)를 통해 폐열회수용 열교환기(310)로 공급되어 15℃로 가열된 후, 관로(L32) 및 관로(L43)을 거쳐 응축기(302)로 공급된다. 응축기(302)로 공급된 해수는 히트펌프(301)의 열교환 매체와 열교환을 일으켜 양식에 적합한 온도인 18℃로 가열된 후, 관로(L44), 관로(L80), 및 관로(L35)를 거쳐 양식용 수조(320)로 공급된다.First, in winter, about 3 ° C. of seawater is supplied to a waste heat recovery heat exchanger 310 through a pipe L31 by a pump P30 and heated to 15 ° C., followed by a pipe L32 and a pipe L43. And is supplied to the condenser 302. The seawater supplied to the condenser 302 generates heat exchange with the heat exchange medium of the heat pump 301 and is heated to 18 ° C., which is suitable for aquaculture, and then passes through a conduit L44, a conduit L80, and a conduit L35. It is supplied to the aquaculture tank 320.
한편, 양식용 수조(320)에서 펌프(P31)를 통해 배출되는 18℃의 폐수는 관로(L41)을 통해 폐열회수용 열교환기(310)로 공급되어 6℃로 냉각된 후, 관로(L42) 및 관로(L33)를 통해 히트펌프(301)의 증발기(304)로 공급된다. 증발기(304)로 공급된 폐수는 히트펌프(301)의 열교환 매체와 열교환을 일으켜 3℃로 냉각된 후, 관로(L70) 및 관로(L45)를 통해 배출된다.Meanwhile, 18 ° C. wastewater discharged from the aquaculture tank 320 through the pump P31 is supplied to a waste heat recovery heat exchanger 310 through a conduit L41, cooled to 6 ° C., and then a conduit L42. And it is supplied to the evaporator 304 of the heat pump 301 through a pipe (L33). The wastewater supplied to the evaporator 304 generates heat exchange with the heat exchange medium of the heat pump 301 and is cooled to 3 ° C., and then discharged through the conduit L70 and the conduit L45.
이와 같은 해수 및 폐수의 유동을 위해 밸브(V37) 및 밸브(V41)는 폐쇄되고, 밸브(V38), 밸브(V39), 밸브(V40), 및 밸브(V42)는 개방되게 된다.The valve V37 and the valve V41 are closed for the flow of the seawater and the wastewater, and the valve V38, the valve V39, the valve V40, and the valve V42 are opened.
여름철에 있어서는 해수의 온도는 평균 28℃ 정도로서, 양식장에 해수를 공급해 주기 위해서는 냉각이 필요하다. 해수가 냉각되어 양식장에 공급되는 과정을 살펴보면, 먼저 28℃ 정도의 해수가 펌프(P30)에 의해 관로(L31)를 통해 폐열회수용 열교환기(310)로 공급되어 20℃로 냉각된 후, 관로(L32)를 통과하고, 4방향 전환밸브의 전환에 의해, 관로(L33)를 거쳐 증발기(304)로 공급된다. 증발기(304)로 공급된 해수는 히트펌프(301)의 열교환 매체와 열교환을 일으켜 양식에 적합한 온도인 18℃로 냉각된 후, 관로(L35)를 거쳐 양식용 수조(320)로 공급된다.In summer, the average temperature of seawater is about 28 ° C, and cooling is necessary to supply seawater to the farms. Looking at the process of cooling the sea water is supplied to the aquaculture farm, first, the seawater of about 28 ℃ is supplied to the waste heat recovery heat exchanger 310 through the pipeline (L31) by the pump (P30) and cooled to 20 ℃, the pipeline It passes through L32 and is supplied to the evaporator 304 via the pipe line L33 by switching of a 4-way selector valve. The seawater supplied to the evaporator 304 generates heat exchange with the heat exchange medium of the heat pump 301 to be cooled to 18 ° C., which is a temperature suitable for aquaculture, and is then supplied to the aquaculture tank 320 through a pipe line L35.
한편, 양식용 수조(320)에서 펌프(P31)를 통해 배출되는 18℃의 폐수는 관로(L41)을 통해 폐열회수용 열교환기(310)로 공급되어 26℃로 가열된 후, 관로(L42) 및 관로(L43)를 통해 히트펌프(301)의 응축기(302)로 공급된다. 응축기(302)로 공급된 폐수는 히트펌프(301)의 열교환 매체와 열교환을 일으켜 28℃로 가열된 후, 관로(L44) 및 관로(L45)를 통해 배출된다.Meanwhile, 18 ° C. wastewater discharged from the aquaculture tank 320 through the pump P31 is supplied to the waste heat recovery heat exchanger 310 through a conduit L41 and heated to 26 ° C., followed by a conduit L42. And it is supplied to the condenser 302 of the heat pump 301 through the pipeline (L43). The wastewater supplied to the condenser 302 heats up with the heat exchange medium of the heat pump 301 to be heated to 28 ° C., and then is discharged through the conduit L44 and the conduit L45.
이와 같은 해수 및 폐수의 유동을 위해서는 밸브(V37) 및 밸브(V41)가 개방되고, 밸브(V38), 밸브(V39), 밸브(V40), 및 밸브(V42)가 폐쇄되게 된다.The valve V37 and the valve V41 are opened and the valve V38, the valve V39, the valve V40, and the valve V42 are closed for the flow of the seawater and the wastewater.
본 실시예에서는 4방향 전환밸브를 이용하여 여름철과 겨울철에 공급되는 해수의 냉각과 가열이 이루어지도록 구성하고 있으나, 히트펌프(301)의 순환 사이클을 여름철과 겨울철에 있어 전환시킴으로써 응축기(302) 및 증발기(304)가 각각이 응축기 및 증발기로서 작동하도록 구성할 수도 있다. 이러한 구성을 통해 여름철과 겨울철에 관로를 변경함이 없이 해수의 냉각과 가열이 이루어질 수 있게 된다.In this embodiment, the four-way switching valve is configured to cool and heat the seawater supplied to the summer and winter seasons, but by switching the circulation cycle of the heat pump 301 in the summer and winter seasons, the condenser 302 and Evaporator 304 may be configured such that each acts as a condenser and an evaporator. This configuration enables cooling and heating of seawater without changing the pipeline in summer and winter.
상기한 바와 같은 본원발명의 구성에 의해, 열효율이 높고 에너지 소비율이 낮은 히트펌프식 폐열회수 시스템을 제공할 수 있게 되어 관련업종의 원가절감을 실현할 수 있게 된다. 특히, 양식업 등과 같이 공급되는 액체의 냉각과 가열이 모두 필요한 경우에도, 단일한 구성을 유지하면서도 에너지 소비율을 낮춰 원가절감을 실현할 수 있다는 장점을 가지게 된다.According to the configuration of the present invention as described above, it is possible to provide a heat pump type waste heat recovery system with high thermal efficiency and low energy consumption rate, thereby realizing cost reduction of related industries. In particular, even if both the cooling and heating of the liquid supplied such as aquaculture, etc. is required, the cost savings can be realized by lowering the energy consumption rate while maintaining a single configuration.
본원발명은 특정한 실시예에 관하여 도시하고 설명하였지만, 이하의 청구범위에 의해 마련되는 본원발명의 기술 사상이나 분야를 벗어나지 않는 한도 내에서 본 발명이 다양하게 개조 및 변화될 수 있다는 것을 당업계에서 통상의 지식을 가진 자는 용이하게 알 수 있음을 밝혀두고자 한다.While the invention has been shown and described with respect to specific embodiments thereof, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit or scope of the invention as set forth in the claims below. I would like to know that those who have knowledge of Easily know.
도 1은 종래기술에 따른 히트펌프식 폐열회수 시스템을 개략적으로 도시하고 있다.Figure 1 schematically shows a heat pump waste heat recovery system according to the prior art.
도 2는 본원발명에 따른 히트펌프식 폐열회수 시스템을 개략적으로 도시하고 있다.Figure 2 schematically shows a heat pump waste heat recovery system according to the present invention.
도 3은 목욕탕에 구현된, 본원발명에 따른 히트펌프식 폐열회수 시스템의 제 1 실시예를 개략적으로 도시하고 있다.Figure 3 schematically shows a first embodiment of a heat pump type waste heat recovery system according to the present invention, implemented in a bath.
도 4는 목욕탕에 구현된, 본원발명에 따른 히트펌프식 폐열회수 시스템의 제 2 실시예를 개략적으로 도시하고 있다.Figure 4 schematically shows a second embodiment of a heat pump waste heat recovery system according to the present invention, implemented in a bath.
도 5는 양식장에 구현된, 본원발명에 따른 히트펌프식 폐열회수 시스템의 제 3 실시예를 개략적으로 도시하고 있다.Figure 5 schematically shows a third embodiment of a heat pump waste heat recovery system according to the present invention, implemented in aquaculture farms.
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