CN103398497A - Single-stage compression and single-stage absorption combined heat pump - Google Patents
Single-stage compression and single-stage absorption combined heat pump Download PDFInfo
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- CN103398497A CN103398497A CN2013103064481A CN201310306448A CN103398497A CN 103398497 A CN103398497 A CN 103398497A CN 2013103064481 A CN2013103064481 A CN 2013103064481A CN 201310306448 A CN201310306448 A CN 201310306448A CN 103398497 A CN103398497 A CN 103398497A
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Abstract
A single-stage compression and single-stage absorption combined heat pump comprises a first evaporator, a compressor, a second evaporator, a first throttle valve, an absorber, a solution pump, a solution heat exchanger, a generator, a condenser, and a second throttle valve. The first evaporator, the compressor, the second evaporator and the first throttle valve form a single-stage compression heat pump. The absorber, the solution pump, the solution heat exchanger, the generator, the condenser, the second throttle valve and the second evaporator form a single-stage absorption heat pump. The first evaporator and a waste heat medium pipe are communicated with the outside; the generator and a drive heat medium pipe are communicated with the outside; the absorber and the condenser are communicated with a heated medium pipe and the outside respectively; accordingly, the single-stage compression and single-stage absorption combined heat pump is formed. The second evaporator serves as a condenser for the single-stage compression heat pump and an evaporator for the single-stage absorption heat pump.
Description
Technical field
The invention belongs to low temperature heat/energy-conserving and environment-protective technical field.
Background technology
Absorption heat pump is take heat energy as power, adopt contrary Carnot cycle realize heat by low temperature to the high temperature transmission, be particularly suitable for the occasion of a large amount of used heat.for the absorption heat pump right take lithium bromide water solution as working medium, due to the physical property of working medium to itself, from temperature parameter, it reclaims the heat energy below 0 ℃ on the one hand, on the one hand when heat supply temperature and interval certain, and waste heat supply temperature is when too low, adopt the single-stage absorption heat pump very high to the temperature requirement that drives thermal medium, from concentration parameter, when the heat supply interval higher, when partially narrow, absorber outlet solution concentration may be too high, this is can be the solution crystallization that makes herein, the 2nd, may cause the generator exports solution concentration over 160 ℃, bring very large hidden danger to unit operation, these are all the single-stage absorption heat pump embodies when evaporating temperature is too low limitation after all, if and adopt the two-stage absorption heat pump structure, make on the one hand set structure complicated, increase cost, the two-stage absorption heat pump of another side classics still can not solve under low evaporating temperature, how to complete the heat supply interval higher, partially narrow heating problems.
The operation principle of compression heat pump is take high-grade mechanical or electrical energy as power, relies on pressure that compressor improves cold-producing medium to realize thermodynamic cycle, is at present most widely used general, technology that technology is the most ripe.physical property due to cold-producing medium itself, compression heat pump can reclaim the heat below 0 ℃, but it is generally acknowledged that its heat supply temperature is no more than 65 ℃, more low better in principle, because when heat supply temperature is higher, the pressure ratio of compressor significantly increases on the one hand, Exhaust temperature rise, air-breathing density reduces, operating efficiency descends, under the objective condition that volumetric efficiency exists, when pressure ratio is increased to certain numerical value, the situation that will there will be compressor not stop transport and turn but can't be air-breathing, on the other hand, because (near 130 ℃) under cold-producing medium high temperature can decompose, therefore for safety, heat supply temperature can not be too high.
The combined heat-pump of the advantage gained of two kinds of heat pumps of invention collection, will help to solve above-mentioned two kinds of insoluble problems of heat pump.
Summary of the invention
The invention provides the combined heat-pump that a kind of single stage compress single-stage absorbs.
the combined heat-pump that a kind of single stage compress single-stage absorbs, by the first evaporimeter, compressor, the second evaporimeter, the first throttle valve, absorber, solution pump, solution heat exchanger, generator, condenser, the second choke valve forms, the first evaporimeter wherein, compressor, the second evaporimeter and first throttle valve form the single-stage compression heat pump, absorber, solution pump, solution heat exchanger, generator, condenser, the second choke valve and the second evaporimeter form the single-stage absorption heat pump, the first evaporimeter medium pipeline that also has surplus heat is communicated with outside, generator drives in addition the thermal medium pipeline and is communicated with outside, absorber and condenser also have respectively the heated medium pipeline to be communicated with outside, form the combined heat-pump that a kind of single stage compress single-stage absorbs.
The second evaporimeter is the condenser of single-stage compression heat pump and the evaporimeter of single-stage absorption heat pump.
Description of drawings
Accompanying drawing is depicted as the combined heat-pump that a kind of single stage compress single-stage provided by the invention absorbs.
In figure, the 1-the first evaporimeter, 2-compressor, the 3-the second evaporimeter, 4-first throttle valve, 5-absorber, 6-solution pump, 7-solution heat exchanger, 8-generator, 9-condenser, the 10-the second choke valve.
The specific embodiment
The combined heat-pump that a kind of single stage compress single-stage provided by the invention absorbs is achieved in that
on structure, by the first evaporimeter 1, compressor 2, the second evaporimeter 3, first throttle valve 4, absorber 5, solution pump 6, solution heat exchanger 7, generator 8, condenser 9, the second choke valve 10 forms, the first evaporimeter 1 wherein, compressor 2, the second evaporimeter 3 and first throttle valve 4 form the single-stage compression heat pump, absorber 5, solution pump 6, solution heat exchanger 7, generator 8, condenser 9, the second choke valve 10 and the second evaporimeter 3 form the single-stage absorption heat pump, the first evaporimeter 1 medium pipeline that also has surplus heat is communicated with outside, generator 8 drives in addition the thermal medium pipeline and is communicated with outside, absorber 5 and condenser 9 also have respectively the heated medium pipeline to be communicated with outside, form the combined heat-pump that a kind of single stage compress single-stage absorbs.
on technique, the waste heat MEDIA FLOW becomes refrigerant vapour and to compressor 2, provides through the refrigerant liquid that the first evaporimeter 1 heating enters wherein, the high temperature that obtains after compressed machine 2 compressions, the refrigerant vapour of high pressure enters the second evaporimeter 3, the refrigerant medium that condensation and heating are flowed through in it in the second evaporimeter 3 becomes refrigerant vapour to provide to absorber 5, the refrigerant liquid that condensation obtains enters the first evaporimeter 1 after 4 throttlings of first throttle valve, from generator 8, the concentrated solution that enters absorber 5 through solution heat exchanger 7 absorbs refrigerant vapour and heat release in heated medium, the weak solution of absorber 5 outlets is through solution pump 6, solution heat exchanger 7 enters generator 8, driving heat medium flow discharges and to condenser 9, provides refrigerant vapour through the solution that generator 8 heating enter in it, the refrigerant vapour heat release that enters condenser 9 obtains cryogen liquid after heated medium, enter the second evaporimeter 3 after the second choke valve 10 throttlings.The second evaporimeter 3 is the condenser of single-stage compression heat pump and the evaporimeter of single-stage absorption heat pump.
The effect that the technology of the present invention can realize---The combined heat-pump that a kind of single stage compress single-stage proposed by the invention absorbs has following effect and advantage:
1. can utilize the low temperature heat energy lower than 0 ℃ to be used for heating, can produce the cold below 0 ℃ when this is cycled to used in refrigeration;
2. can utilize the heating of the waste heat media implementation of low temperature to the partially narrow heat supply of temperature drift, scope interval;
3. at waste heat supply temperature with drive under the certain condition of hot temperature, the pressure ratio of compressor can decrease;
4. combined heat-pump is simple in structure, and the operation of two heat pumps influences each other and be separate, and is easy to operate, and easily, feasibility is high in maintenance.
Give an example to illustrate the actual effect that the present invention brings:
There is the low temperature exhaust heat of a large amount of 30 ℃ in somewhere, and this place has technique certain material need to be increased to 75 ℃ from 65 ℃, and technique originally is to adopt 0.2Mpa, the low-pressure steam of 120 ℃ directly to heat.
If 1. adopt the compression type heat pump technique, surpassed the heat supply upper limit of compression heat pump due to heat supply temperature, therefore compression heat pump can't be completed this task, namely fractional energy savings is 0;
If 2. adopt the single-stage absorption heat pump, getting evaporating temperature is 25 ℃, and the driving vapor (steam) temperature that needs is 155 ℃, and the low-pressure steam that this place provides does not obviously reach requirement, and fractional energy savings is also 0;
If 3. adopt the two-stage absorption heat pump, getting evaporating temperature is 25 ℃, can complete heating tasks, and the COP of two-stage absorption heat pump is 1.35, and fractional energy savings is 25.9%;
If 4. adopt technical scheme provided by the present invention, can utilize compression heat pump to reclaim the heat of low temperature exhaust heat, it is increased to 55 ℃, the refrigerant vapour temperature of such the second evaporator outlet can reach 50 ℃, through to the calculating of absorption heat pump as can be known technical scheme provided by the invention can complete this task.On technical indicator, absorption heat pump COP is about 1.8, adopt the cold-producing medium of R134a as compression heat pump, the compressor pressure ratio is 2.5, the COP that heats is about 6, the synthesis energy saving rate of scheme provided by the invention in this case is about 46.3%, is about 1.8 times of two-stage absorption heat pump, and structure of the present invention is more simple, reliable.
Claims (2)
1. the combined heat-pump that absorbs of a single stage compress single-stage, by the first evaporimeter, compressor, the second evaporimeter, the first throttle valve, absorber, solution pump, solution heat exchanger, generator, condenser, the second choke valve forms, the first evaporimeter wherein, compressor, the second evaporimeter and first throttle valve form the single-stage compression heat pump, absorber, solution pump, solution heat exchanger, generator, condenser, the second choke valve and the second evaporimeter form the single-stage absorption heat pump, the first evaporimeter medium pipeline that also has surplus heat is communicated with outside, generator drives in addition the thermal medium pipeline and is communicated with outside, absorber and condenser also have respectively the heated medium pipeline to be communicated with outside, form the combined heat-pump that a kind of single stage compress single-stage absorbs.
2. the combined heat-pump of a kind of single stage compress single-stage absorption of the present invention, is characterized in that the second evaporimeter is the condenser of single-stage compression heat pump and the evaporimeter of single-stage absorption heat pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2013103064481A CN103398497A (en) | 2013-07-22 | 2013-07-22 | Single-stage compression and single-stage absorption combined heat pump |
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| CN2013103064481A CN103398497A (en) | 2013-07-22 | 2013-07-22 | Single-stage compression and single-stage absorption combined heat pump |
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| CN103398497A true CN103398497A (en) | 2013-11-20 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103868272A (en) * | 2014-04-09 | 2014-06-18 | 浙江海洋学院 | Waste-heat-absorbing refrigeration system of tuna clipper |
| CN103884130A (en) * | 2014-04-09 | 2014-06-25 | 浙江海洋学院 | Ship refrigerator system capable of absorbing waste heat to assist in refrigeration |
-
2013
- 2013-07-22 CN CN2013103064481A patent/CN103398497A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103868272A (en) * | 2014-04-09 | 2014-06-18 | 浙江海洋学院 | Waste-heat-absorbing refrigeration system of tuna clipper |
| CN103884130A (en) * | 2014-04-09 | 2014-06-25 | 浙江海洋学院 | Ship refrigerator system capable of absorbing waste heat to assist in refrigeration |
| CN103884130B (en) * | 2014-04-09 | 2017-02-15 | 浙江海洋学院 | Ship refrigerator system capable of absorbing waste heat to assist in refrigeration |
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Application publication date: 20131120 |