CN101852521B - Load adjusting method - Google Patents
Load adjusting method Download PDFInfo
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- CN101852521B CN101852521B CN2010101964843A CN201010196484A CN101852521B CN 101852521 B CN101852521 B CN 101852521B CN 2010101964843 A CN2010101964843 A CN 2010101964843A CN 201010196484 A CN201010196484 A CN 201010196484A CN 101852521 B CN101852521 B CN 101852521B
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- Prior art keywords
- cryogen
- lithium bromide
- load
- bromide absorption
- temperature
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- Expired - Fee Related
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/62—Absorption based systems
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- Sorption Type Refrigeration Machines (AREA)
Abstract
The invention relates to the technical field of the lithium bromide absorption-type machine unit control. A load adjusting method relates to a single/double effect lithium bromide absorption-type refrigerating machine; and the machine unit is added with a refrigerant adjusting system which adjusts the overflow quantity of the refrigerant from an evaporator to an absorber, thus adjusting the load of the machine unit. The method has simple structure, is additionally provided with a bypass pipeline and an overflow valve in the traditional machine unit, controls in real time by a control loop, conducts the adjustment of the overflow quantity of the refrigerant according to the size of the load, adjusts the load by adjusting the overflow quantity of the refrigerant, and does not adjust the input heat by a control valve, therefore, when being loaded partially, the machine unit not only can stably run to guarantee the refrigerating requirements of a user, but also can consume the waste heat generated by a technique completely by the machine unit, and has no influence on the operation of the technique of the user. Simultaneously, the control loop formed by liquid level detection and the controller protects a refrigerant pump and prevents the cavitation erosion phenomenon occurred on the refrigerant pump and has wide application scope.
Description
Technical field
The invention belongs to lithium bromide absorption-type machine unit control technology field, relate to the load adjusting method of list/double-effect lithium bromide absorption chiller.
Background technology
Single-effect lithium bromide absorption refrigerating machine group in the past is as shown in Figure 1, is widely used in used heat (being lower than 100 ℃ water at low temperature, the low-pressure steam that is lower than 0.2MPa.G, low-temperature flue gas) and reclaims the refrigeration aspect.Its operation principle is: by the cryogenic coolant water-cooled after the throttlings of reducing pressure from condenser 3 but, water as refrigerant flashes to refrigerant vapour after absorbing the cold water heat to cold water, gets in the absorber 2 to be absorbed by concentrated solution, becomes weak solution in evaporimeter 1.Weak solution in the absorber 2 is sent to heat exchanger 5, the temperature rising of heat regenerator 6 (warm water type, flue gas type do not have heat regenerator) back by solution pump 9, gets into regenerator 4 at last, and weak solution is condensed into concentrated solution by extraneous low-pressure steam/warm water heating in regenerator 4.Concentrated solution gets into absorber 2 after heat exchanger 5 temperature reduce, drip to drench on cooling water pipe, absorbs the refrigerant vapour of flash-pot 1, becomes weak solution.On the other hand, in regenerator 4, the water vapour that behind extraneous low-pressure steam/warm water/flue gas heating lithium-bromide solution, produces; Get into condenser 3 and be cooled, become cryogenic coolant water, get into evaporimeter 1 through the decompression throttling; Drip and drench on cold water pipe, cooling gets into the cold water of evaporimeter.Carry out repeatedly with cocycle, reach the purpose of producing low-temperature cold water.Load Regulation with cocycle is to realize through the heat that adjusting control valve 7 is regulated input.
But two kinds of phenomenons of general existence in practical application; The one, user's supply steam pressure is very low; Below the steam pressure 0.05MPa.G, the 2nd, the user does not allow to regulate the variation of load through regulating the input heat, because the thermal source of input is technology used heat mostly; If regulate the variation that input can cause user's technology, the user need all consume the used heat that technology produces through lithium-bromide absorption-type refrigerating machine.In the face of these two kinds of phenomenons, unit just can't satisfy user's control requirement when operation at part load.Adjusting problem when therefore, how to solve sub-load becomes the difficult problem that such used heat utilizes unit.
Summary of the invention
The objective of the invention is to overcome above-mentioned not enough problem; A kind of load adjusting method is provided; Do not regulate the input heat, make the unit can steady running when sub-load, guarantee user's refrigeration demand through control valve; Can the used heat that technology produces all be consumed through this unit again, do not influence user's technology operation.
The present invention is achieved in that a kind of load adjusting method, relates to list/double-effect lithium bromide absorption chiller, on unit, adds the cryogen regulating system, and the cryogen regulating system is regulated the cryogen spillway discharge from the evaporimeter to the absorber, thereby regulates unit load.
Said cryogen regulating system comprises cryogen case, liquid level detection device, overflow valve, controller and connecting line and distribution; Draw a bypass line at evaporimeter cryogen shower, overflow valve is installed on the bypass line, the bypass line outlet is communicated with absorber; Install on the evaporimeter and connection cryogen case; On the cryogen case liquid level detection device is set, the liquid level detection device signal connects controller, and controller signals connects overflow valve and controls overflow valve in real time according to detection signal.
Said cooling water inlet and outlet are equipped with temperature-detecting device, and the temperature-detecting device signal connects controller.
Said liquid level detection device adopts level electrode, ball float etc.; Temperature-detecting device adopts temperature sensor.
Said controller receives cooling water inlet and outlet temperature signal, and evaporimeter fluid level condition detection signal; By signal processing module input central control module, central control module according to temperature and design temperature relatively and calculate the aperture of overflow valve carries out overflow valve and controls, if the evaporimeter liquid level is low, cryogenic fluid pump stops; Otherwise normal operation.
Said list/double-effect lithium bromide absorption chiller comprises steam type single-effect lithium bromide absorption refrigerating machine or warm water type single-effect lithium bromide absorption refrigerating machine or flue gas type list/double-effect lithium bromide absorption type cold warm water machine.
The present invention is simple in structure, in conventional rack, adds bypass line and overflow valve, controls in real time through control loop; Carry out cryogen discharge amount according to payload and regulate, regulate load, do not regulate the input heat through control valve through the spillway discharge of regulating cryogen; Make the unit can steady running when sub-load; Guarantee user's refrigeration demand, can the used heat that technology produces all be consumed through this unit again, do not influence user's technology operation.The control loop protection cryogenic fluid pump that forms through Level Detection and controller simultaneously prevents cryogenic fluid pump generation cavitation, applied range.
Description of drawings
Fig. 1 is traditional single-effect lithium bromide absorption refrigerating machine schematic flow sheet;
Fig. 2 is the schematic flow sheet of single-effect lithium bromide absorption refrigerating machine of the present invention;
Fig. 3 is a controller control flow chart of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is elaborated.
Single-effect lithium bromide absorption refrigerating machine as shown in Figure 2 relates to evaporimeter 1, absorber 2, cryogenic fluid pump 8 etc., on unit, adds the cryogen regulating system; The cryogen regulating system is regulated from evaporimeter 1 to absorber 2 cryogen spillway discharge; Thereby adjusting unit load, cryogen regulating system comprise cryogen case 11, liquid level detection device 12, overflow valve 13, controller 14 and connecting line and distribution, draw a bypass line 10 at evaporimeter 1 cryogen shower; Overflow valve 13 is installed on the bypass line 10; The bypass line port is communicated with absorber 2, installs on the evaporimeter and connection cryogen case 11, and liquid level detection device 12---level electrode is set on the cryogen case; The level electrode signal connects controller 14; Controller 14 signals connect overflow valve 13 and control overflow valve 13 in real time according to detection signal, and do not need the control valve 7 (Fig. 1) of thermal source input place to control, and monitor the water as refrigerant level condition in the evaporimeter 1 constantly through level electrode; And carry out running protection through 14 pairs of cryogenic fluid pumps of controller 8, prevent that it from the cavitation erosion problem taking place.
When unit is worked; As shown in Figure 3, cooling water inlet and outlet temperature are detected by temperature sensor in real time, and temperature detection signal is imported the processes temperature signal module of controller 14; The evaporimeter fluid level condition is detected by level electrode in real time; And liquid level signal imported the liquid level signal processing module of controller, the central control module of controller 14 receives signal, and the aperture that cooling water inlet and outlet temperature and design load compare the calculating overflow valve (is exported real time temperature and is higher than setting value; Then drive big overflow valve; Otherwise opposite), promptly to regulate the cryogen amount that cryogen sprays evaporimeter 1 heat exchanger tube and regulate load, a small amount of refrigerant vapour of generation gets into absorber 2 and is absorbed by concentrated solution and become consistency solution; And be mixed into weak solution with water as refrigerant that part overflows to absorber 2; Weak solution is sent to heat exchanger 5, the temperature rising of heat regenerator 6 (warm water type/flue gas type does not have) back by solution pump 9, gets into regenerator 4 at last, and weak solution is condensed into concentrated solution by extraneous low-pressure steam/warm water heating in regenerator 4.Concentrated solution gets into absorber 2 after heat exchanger 5 temperature reduce, drip to drench on cooling water pipe, absorbs the part refrigerant vapour of flash-pot 1, becomes consistency solution.On the other hand, in regenerator 4, the water vapour that behind extraneous low-pressure steam/warm water heating lithium-bromide solution, produces; Getting into condenser 3 is cooled; Become cryogenic coolant water through the decompression throttling, get into evaporimeter 1, a part is dripped and is drenched on cold water pipe; Cooling gets into the cold water of evaporimeter, and a part directly is bypassed to absorber.The evaporimeter liquid level is low in addition, and cryogenic fluid pump is forced out of service, prevents cavitation erosion, forces to stop normal operation otherwise remove.
Claims (4)
1. load adjusting method; Relate to list/double-effect lithium bromide absorption chiller, it is characterized in that: on unit, add the cryogen regulating system, the cryogen regulating system comprises cryogen case, liquid level detection device, overflow valve, controller and connecting line and distribution; Draw a bypass line at evaporimeter cryogen shower; Overflow valve is installed on the bypass line, and the bypass line outlet is communicated with absorber, installs on the evaporimeter and connection cryogen case; On the cryogen case liquid level detection device is set, the liquid level detection device signal connects controller; Cooling water inlet and outlet are equipped with temperature-detecting device, and the temperature-detecting device signal connects controller; Controller receives cooling water inlet and outlet temperature signal, and evaporimeter fluid level condition detection signal; By signal processing module input central control module; Central control module according to temperature and design temperature relatively and calculate the aperture of overflow valve; Controller signals connects overflow valve and controls overflow valve in real time according to detection signal; The cryogen spillway discharge of adjusting from the evaporimeter to the absorber, thus unit load regulated.
2. a kind of load adjusting method according to claim 1 is characterized in that: if the evaporimeter liquid level is low, cryogenic fluid pump stops; Otherwise normal operation.
3. a kind of load adjusting method according to claim 1 is characterized in that: liquid level detection device adopts level electrode or ball float; Temperature-detecting device adopts temperature sensor.
4. according to the arbitrary described a kind of load adjusting method of claim 1-3, it is characterized in that: single-effect lithium bromide absorption refrigerating machine comprises steam type single-effect lithium bromide absorption refrigerating machine, warm water type single-effect lithium bromide absorption refrigerating machine, flue gas type mono-potency lithium bromide absorption cooling and warming water machine or flue gas type double-effect lithium bromide absorption type cold warm water machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101964843A CN101852521B (en) | 2010-06-10 | 2010-06-10 | Load adjusting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101964843A CN101852521B (en) | 2010-06-10 | 2010-06-10 | Load adjusting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101852521A CN101852521A (en) | 2010-10-06 |
| CN101852521B true CN101852521B (en) | 2012-09-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101964843A Expired - Fee Related CN101852521B (en) | 2010-06-10 | 2010-06-10 | Load adjusting method |
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| Country | Link |
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| CN (1) | CN101852521B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107178928B (en) * | 2017-06-23 | 2022-12-13 | 松下制冷（大连）有限公司 | Slag flushing water waste heat extraction type lithium bromide absorption cold and hot water unit |
| CN107942771B (en) * | 2017-10-24 | 2020-11-06 | 新奥泛能网络科技股份有限公司 | Data center energy supply control system and method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55105157A (en) * | 1979-02-05 | 1980-08-12 | Ebara Mfg | Absorption refrigerating machine |
| JPS602858A (en) * | 1983-06-20 | 1985-01-09 | 株式会社荏原製作所 | Absorption refrigerator |
| JPH0754216B2 (en) * | 1987-04-16 | 1995-06-07 | 三洋電機株式会社 | Absorption refrigerator |
| JPS6454180A (en) * | 1987-08-26 | 1989-03-01 | Sanyo Electric Co | Absorption water chiller and heater |
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2010
- 2010-06-10 CN CN2010101964843A patent/CN101852521B/en not_active Expired - Fee Related
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| CN101852521A (en) | 2010-10-06 |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: PANASONIC REFRIGERATION (DALIAN) CO., LTD. Free format text: FORMER NAME: DALIAN SANYANG REFRIGERATING CO., LTD. |
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| CP03 | Change of name, title or address |
Address after: 116000 Dalian economic and Technological Development Zone, Huaihe West Road, No. 117, No. 118 (Pine Street, No. 10) (No.) Patentee after: PANASONIC REFRIGERATION (DALIAN) CO.,LTD. Address before: 116600 No. 118 West Huaihe Road, Dalian economic and Technological Development Zone, Liaoning Patentee before: Dalian Sanyo Refrigeration Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120912 |