CN102980234B - High-temperature geothermal water series connection heating method - Google Patents
High-temperature geothermal water series connection heating method Download PDFInfo
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- CN102980234B CN102980234B CN201210526981.4A CN201210526981A CN102980234B CN 102980234 B CN102980234 B CN 102980234B CN 201210526981 A CN201210526981 A CN 201210526981A CN 102980234 B CN102980234 B CN 102980234B
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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
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/40—Geothermal heat-pumps
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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Abstract
The invention discloses a high-temperature geothermal water series connection heating system and a heating method thereof. The system comprises a high-temperature geothermal well; and a heat exchange end is provided with an air-conditioner rear end of a heating circulation water pump, and first-level heating equipment, second-level heating equipment and third-level heating equipment which are connected between the high-temperature geothermal well and the air-conditioner rear end. The system is simple in structure and convenient to use; a controller is used to automatically control the starting running of the first-level heating equipment, the second-level heating equipment and the third-level heating equipment, so that the heating energy supply of the air-conditioner rear end can be ensured; and the system supplies heats by means of a heat exchanger and a water source hot pump, so that, even the geothermal heat is unsteady, the heating energy of the heating rear end is still stable, and the heating effect is guaranteed.
Description
Technical field
The present invention relates to water source heat pump air conditioning system field, specifically a kind of high-temperature geothermal water series connection heating method.
Background technology
Along with the development of heating technology, experienced by the development such as fiery direct heating, boiler heating, the heating of earth source heat pump unit, solar heating, there is following deficiency in current heating technology: the first, boiler heating operating cost is higher, and security is not good enough; The second, Heating by Ground Source Heat Pump adopts geothermal source to heat, but when in the insufficient situation of geothermal source heat energy, just can not ensure the heat heated; 3rd, solar heating is subject to light and heat energy restriction, and heating is unstable; 4th, air source heat pump heating is subject to the impact of environment temperature, also extremely unstable.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of high-temperature geothermal water series connection heating method, utilizes geothermal source to heat, and energy-conservation with under prerequisite that is that utilize the energy, ensure that the stable of air conditioning terminal heating heat energy.
Technical scheme of the present invention is:
A kind of high-temperature geothermal water series connection heating method, high-temperature geothermal water series connection heating system is adopted to heat, high-temperature geothermal water series connection heating system includes the air conditioning terminal that high-temperature geothermal well and heat-exchange end are provided with heating water circulating pump, is connected with one-level heating equipment, secondary heating equipment and three grades of heating equipments between high-temperature geothermal well and air conditioning terminal; Described one-level heating equipment includes First Heat Exchanger, high-temperature geothermal well is connected with the thermal source import of First Heat Exchanger, the refrigerant inlet of First Heat Exchanger is connected with air conditioning terminal respectively with refrigerant outlet, and is connected with Open valve between the refrigerant inlet of First Heat Exchanger and air conditioning terminal; Described secondary heating equipment includes the second heat exchanger and the first water resource heat pump, the refrigerant inlet of the second heat exchanger is connected with the refrigeration end of the first water resource heat pump respectively with refrigerant outlet, the end that heats of the first water resource heat pump is connected with air conditioning terminal, and is connected with circulating pump between the refrigeration end of the refrigerant outlet of the second heat exchanger and the first water resource heat pump; Three grades of described heating equipments include second water source heat pump, and the end that heats of second water source heat pump is connected with air conditioning terminal; The thermal source outlet of described First Heat Exchanger is connected with the thermal source import of the second heat exchanger, and the thermal source outlet of the second heat exchanger is connected with the refrigeration end of second water source heat pump, and the refrigeration end of second water source heat pump is connected with high-temperature geothermal well; The thermal source outlet of described First Heat Exchanger and the thermal source outlet place of the second heat exchanger are respectively arranged with the first temperature sensor and the second temperature sensor, and described heating water circulating pump, Open valve, circulating pump, the first temperature sensor, the second temperature sensor are all electrically connected with controller; Be connected with GEOTHERMAL WATER lift pump between described high-temperature geothermal well and the thermal source import of First Heat Exchanger, described GEOTHERMAL WATER lift pump is electrically connected with controller; Be connected with back-water valve (BWV) between the refrigeration end of described second water source heat pump and high-temperature geothermal well, and back-water valve (BWV) is electrically connected with controller; The refrigeration end place of described second water source heat pump is provided with draining valve and three-temperature sensor, and described draining valve, three-temperature sensor are all electrically connected with controller; The first described water resource heat pump is circulated by the first compressor, the first condenser, first throttle valve and the first evaporimeter to be formed by connecting, and the refrigeration end of the first described water resource heat pump is the first evaporator end, and the end that heats of the first water resource heat pump is the first condenser end; Described second water source heat pump is circulated by the second compressor, the second condenser, second throttle and the second evaporimeter to be formed by connecting, and the refrigeration end of described second water source heat pump is the second evaporator end, and the end that heats of second water source heat pump is the second condenser end;
Concrete control mode is as follows:
(1), one-level heating system:
When the first temperature sensor detects water temperature higher than certain setting value T1max, one-level heating equipment opened by controller, be about to heating water circulating pump, GEOTHERMAL WATER lift pump, Open valve and First Heat Exchanger are opened, after GEOTHERMAL WATER in high-temperature geothermal well is delivered to First Heat Exchanger by GEOTHERMAL WATER lift pump, the cold-producing medium transmitted with air conditioning terminal in First Heat Exchanger carries out heat exchange cold-producing medium, cold-producing medium after heating is delivered to air conditioning terminal from the refrigerant outlet output of First Heat Exchanger and is heated, promote room temperature, the GEOTHERMAL WATER of simultaneously lowering the temperature after heat exchange in First Heat Exchanger is more successively through the second heat exchanger, second evaporimeter, high-temperature geothermal well got back to by back-water valve (BWV),
(2), secondary heating system:
When the first temperature sensor detects water temperature lower than T1max but higher than certain setting value T1min, secondary heating equipment opened by controller, namely heating water circulating pump is opened, GEOTHERMAL WATER lift pump, circulating pump, second heat exchanger and the first water resource heat pump, GEOTHERMAL WATER in high-temperature geothermal well is delivered to the second heat exchanger through First Heat Exchanger by GEOTHERMAL WATER lift pump, simultaneously the cold-producing medium that transmits of air conditioning terminal is after the first water source heat pump heating circulation, refrigerating medium after its first evaporator end heat exchange enters the second heat exchanger, the refrigerating medium of low temperature and GEOTHERMAL WATER carry out heat exchange at the second heat exchanger, the refrigerating medium of low temperature is reentered the first water resource heat pump by heating and obtains the cold-producing medium after heating through heating circulation, cold-producing medium finally after heating enters air conditioning terminal and heats, promote room temperature, and through heat exchange cooling GEOTHERMAL WATER more successively through the second evaporimeter, high-temperature geothermal well got back to by back-water valve (BWV),
(3), three grades of heating systems:
When the second temperature sensor to detect in water temperature lower than certain setting value T2max but higher than certain setting value T2min, three grades of heating equipments opened by controller, namely heating water circulating pump is opened, GEOTHERMAL WATER lift pump and second water source heat pump, GEOTHERMAL WATER lift pump by the GEOTHERMAL WATER in high-temperature geothermal well through First Heat Exchanger, second heat exchanger is transferred to the second evaporimeter, second water source heat pump utilizes GEOTHERMAL WATER heat energy to heat the cold-producing medium that air conditioning terminal is delivered to second water source heat pump, cold-producing medium after heating is delivered to the cold-producing medium heat energy of air conditioning terminal more again, high-temperature geothermal well is got back to through back-water valve (BWV) again by the GEOTHERMAL WATER of lowering the temperature,
(4), GEOTHERMAL WATER drainage pattern:
When three-temperature sensor to detect in water temperature lower than certain setting value T3, close the second valve, controller opening water discharge system, namely the GEOTHERMAL WATER in high-temperature geothermal well emits by opening water discharge valve after First Heat Exchanger, the second heat exchanger, the second evaporimeter and draining valve;
(5), one-level heating, secondary are for the warm three grades modes of opening that heat simultaneously:
Step (1), (2) and (3) three kinds of modes are combined.
The first described evaporimeter and the second evaporimeter inner refrigerant and refrigerating medium carry out heat exchange operation.
Beneficial effect of the present invention:
(1), structure of the present invention is simple, easy to use, adopts controller automatically to control the startup optimization of one-level heating equipment, secondary heating equipment and three grades of heating equipments, ensure that the heat energy supply of the heating of air conditioning terminal;
(2), high-temperature geothermal water of the present invention separates Multi-class propagation, fully uses up GEOTHERMAL WATER heat, at utmost using amount of hot water frugally;
(3), the present invention is provided with one-level heating equipment, secondary heating equipment and three grades of heating equipments, utilize heat exchanger and water resource heat pump two kinds of modes in conjunction with heating, even if ensure that when underground heat heat energy is indefinite, the heating energy of heating end is still stablized, thus ensure that the effect of heating.
Accompanying drawing explanation
Fig. 1 is pipeline connecting figure of the present invention.
Fig. 2 is circuit connection diagram of the present invention.
Detailed description of the invention
See Fig. 1, a kind of high-temperature geothermal water series connection heating system, include high-temperature geothermal well 9, the air conditioning terminal 2 that heat-exchange end is provided with heating water circulating pump 1 and the one-level heating equipment, secondary heating equipment and the three grades of heating equipments that are connected between high-temperature geothermal well 9 and air conditioning terminal 2;
One-level heating equipment includes First Heat Exchanger 7, high-temperature geothermal well 7 is connected with the thermal source import 7a of First Heat Exchanger by GEOTHERMAL WATER lift pump 8, the refrigerant inlet 7c of First Heat Exchanger is connected with air conditioning terminal 2 respectively with refrigerant outlet 7d, and is connected with Open valve 23 between the refrigerant inlet 7c of First Heat Exchanger and air conditioning terminal 2;
Secondary heating equipment includes the second heat exchanger 12 and the first water resource heat pump 3, first water resource heat pump 3 is circulated by the first compressor 4, first condenser 10, first throttle valve 11 and the first evaporimeter 5 to be formed by connecting, the refrigerant inlet 12c of the second heat exchanger is connected with the first evaporimeter 5 respectively with refrigerant outlet 12d, first condenser 10 is connected with air conditioning terminal 2, and is connected with circulating pump 6 between the refrigerant outlet 12d of the second heat exchanger and the first evaporimeter 5;
Three grades of heating equipments include second water source heat pump 13, and second water source heat pump 13 is circulated by the second compressor 16, second condenser 14, second throttle 15 and the second evaporimeter 17 to be formed by connecting, and the second condenser 14 is connected with air conditioning terminal 2;
The thermal source outlet 7b of First Heat Exchanger is connected with the thermal source import 12a of the second heat exchanger, the thermal source outlet 12b of the second heat exchanger is connected with the second evaporimeter 17, and the second evaporimeter 17 is connected with high-temperature geothermal well 9 by back-water valve (BWV) 19, the second evaporimeter 17 is provided with draining valve 18; The thermal source outlet 7b of First Heat Exchanger, the thermal source outlet 12b of the second heat exchanger and the second evaporimeter 17 place are respectively arranged with the first temperature sensor 22, second temperature sensor 21 and three-temperature sensor 20;
See Fig. 2, GEOTHERMAL WATER lift pump 8, heating water circulating pump 1, Open valve 23, circulating pump 6, back-water valve (BWV) 19, draining valve 18, first temperature sensor 22, second temperature sensor 21, three-temperature sensor 20 are all electrically connected with controller 24.
A kind of high-temperature geothermal water series connection heating method, comprises following control mode:
(1), one-level heating system:
When the first temperature sensor 22 detects that water temperature generally sets 45 DEG C higher than certain setting value T1max() time, one-level heating equipment opened by controller 24, be about to heating water circulating pump 1, GEOTHERMAL WATER lift pump 8, Open valve 23 and First Heat Exchanger 7 are opened, after GEOTHERMAL WATER in high-temperature geothermal well 9 is delivered to First Heat Exchanger 7 by GEOTHERMAL WATER lift pump 8, the cold-producing medium transmitted with air conditioning terminal in First Heat Exchanger 7 carries out heat exchange cold-producing medium, cold-producing medium after heating is delivered to air conditioning terminal from the refrigerant outlet 7d output of First Heat Exchanger and is heated, promote room temperature, the GEOTHERMAL WATER of simultaneously lowering the temperature after heat exchange in First Heat Exchanger 7 is more successively through the second heat exchanger 12, second evaporimeter 17, high-temperature geothermal well 9 got back to by back-water valve (BWV) 19.Wherein, the heating circulation of high-temperature geothermal well 9 is: 9 → 8 → 7 → 12 → 17 → 19 → 9, and the heating circulation of heating end 2 is: 2 → 1 → 23 → 7 → 2.
(2), secondary heating system:
When the first temperature sensor 22 detect water temperature lower than T1max but generally set 25 DEG C higher than certain setting value T1min() time, secondary heating equipment opened by controller 24, namely heating water circulating pump 1 is opened, GEOTHERMAL WATER lift pump 8, circulating pump 6, second heat exchanger 12 and the first water resource heat pump 3, GEOTHERMAL WATER in high-temperature geothermal well 9 is delivered to the second heat exchanger 12 through First Heat Exchanger 7 by GEOTHERMAL WATER lift pump 8, simultaneously the cold-producing medium that transmits of air conditioning terminal 2 is after the first water resource heat pump 3 heats circulation, refrigerating medium after its first evaporator end heat exchange enters the second heat exchanger 12, the refrigerating medium of low temperature and GEOTHERMAL WATER carry out heat exchange at the second heat exchanger 12, the refrigerating medium of low temperature is reentered the first water resource heat pump 3 by heating and obtains the cold-producing medium after heating through heating circulation, cold-producing medium finally after heating enters air conditioning terminal 2 and heats, promote room temperature, and through heat exchange cooling GEOTHERMAL WATER more successively through the second evaporimeter 17, high-temperature geothermal well 9 got back to by back-water valve (BWV) 19.The heating circulation of high-temperature geothermal well 9 is: 9 → 8 → 7 → 12 → 17 → 19 → 9, the heating circulation of heating end 2 is: 2 → 1 → 10 → 2, the circulation that heats of the first water resource heat pump 3 cold-producing medium is: the refrigerating medium circulation of the 10 → 11 → 5 → 4 → 10 → 2, second heat exchanger: 5 → 12 → 6 → 5.
Wherein, the first evaporimeter 5 inner refrigerant and refrigerating medium carry out heat exchange operation.
(3), three grades of heating systems:
25 DEG C are generally set lower than certain setting value T2max(when the second temperature sensor 21 detects in water temperature) but be generally set as 8 DEG C higher than certain setting value T2min() time, three grades of heating equipments opened by controller 24, namely heating water circulating pump 1 is opened, GEOTHERMAL WATER lift pump 8 and second water source heat pump 13, GEOTHERMAL WATER lift pump 8 by the GEOTHERMAL WATER in high-temperature geothermal well 9 through First Heat Exchanger 7, second heat exchanger 12 is transferred to the second evaporimeter 17, second water source heat pump 13 utilizes GEOTHERMAL WATER heat energy to heat the cold-producing medium that air conditioning terminal 2 is delivered to second water source heat pump 13, cold-producing medium after heating is delivered to the cold-producing medium heat energy of air conditioning terminal 2 more again, high-temperature geothermal well 9 is got back to through back-water valve (BWV) 19 again by the GEOTHERMAL WATER of lowering the temperature.The heating circulation of high-temperature geothermal well 9 is: 9 → 8 → 7 → 12 → 17 → 19 → 9, and the heating circulation of heating end 2 is: 2 → 1 → 14 → 2, and the circulation that heats of second water source heat pump 13 cold-producing medium is: 14 → 15 → 17 → 16 → 14.
Second evaporimeter inner refrigerant and refrigerating medium carry out heat exchange operation.
(4), GEOTHERMAL WATER drainage pattern:
When the 3rd go out temperature sensor 20 detect in water temperature generally set 5 DEG C lower than certain setting value T3() time, close the second valve 19, controller 24 opening water discharge system, namely the GEOTHERMAL WATER in high-temperature geothermal well 9 emits by opening water discharge valve 18 after First Heat Exchanger 7, second heat exchanger 12, second evaporimeter 17 and draining valve 18.
(5), one-level heating, secondary are for the warm three grades modes of opening that heat simultaneously:
Step (1), (2) and (3) three kinds of modes are combined.
Claims (1)
1. a high-temperature geothermal water series connection heating method, it is characterized in that: adopt high-temperature geothermal water series connection heating system to heat, high-temperature geothermal water series connection heating system includes the air conditioning terminal that high-temperature geothermal well and heat-exchange end are provided with heating water circulating pump, is connected with one-level heating equipment, secondary heating equipment and three grades of heating equipments between high-temperature geothermal well and air conditioning terminal; Described one-level heating equipment includes First Heat Exchanger, high-temperature geothermal well is connected with the thermal source import of First Heat Exchanger, the refrigerant inlet of First Heat Exchanger is connected with air conditioning terminal respectively with refrigerant outlet, and is connected with Open valve between the refrigerant inlet of First Heat Exchanger and air conditioning terminal; Described secondary heating equipment includes the second heat exchanger and the first water resource heat pump, the refrigerant inlet of the second heat exchanger is connected with the refrigeration end of the first water resource heat pump respectively with refrigerant outlet, the end that heats of the first water resource heat pump is connected with air conditioning terminal, and is connected with circulating pump between the refrigeration end of the refrigerant outlet of the second heat exchanger and the first water resource heat pump; Three grades of described heating equipments include second water source heat pump, and the end that heats of second water source heat pump is connected with air conditioning terminal; The thermal source outlet of described First Heat Exchanger is connected with the thermal source import of the second heat exchanger, and the thermal source outlet of the second heat exchanger is connected with the refrigeration end of second water source heat pump, and the refrigeration end of second water source heat pump is connected with high-temperature geothermal well; The thermal source outlet of described First Heat Exchanger and the thermal source outlet place of the second heat exchanger are respectively arranged with the first temperature sensor and the second temperature sensor, and described heating water circulating pump, Open valve, circulating pump, the first temperature sensor, the second temperature sensor are all electrically connected with controller; Be connected with GEOTHERMAL WATER lift pump between described high-temperature geothermal well and the thermal source import of First Heat Exchanger, described GEOTHERMAL WATER lift pump is electrically connected with controller; Be connected with back-water valve (BWV) between the refrigeration end of described second water source heat pump and high-temperature geothermal well, and back-water valve (BWV) is electrically connected with controller; The refrigeration end place of described second water source heat pump is provided with draining valve and three-temperature sensor, and described draining valve, three-temperature sensor are all electrically connected with controller; The first described water resource heat pump is circulated by the first compressor, the first condenser, first throttle valve and the first evaporimeter to be formed by connecting, and the refrigeration end of the first described water resource heat pump is the first evaporator end, and the end that heats of the first water resource heat pump is the first condenser end; Described second water source heat pump is circulated by the second compressor, the second condenser, second throttle and the second evaporimeter to be formed by connecting, and the refrigeration end of described second water source heat pump is the second evaporator end, and the end that heats of second water source heat pump is the second condenser end;
Concrete control mode is as follows:
(1), one-level heating system:
When the first temperature sensor detects water temperature higher than certain setting value T1max, one-level heating equipment opened by controller, be about to heating water circulating pump, GEOTHERMAL WATER lift pump, Open valve and First Heat Exchanger are opened, after GEOTHERMAL WATER in high-temperature geothermal well is delivered to First Heat Exchanger by GEOTHERMAL WATER lift pump, the cold-producing medium transmitted with air conditioning terminal in First Heat Exchanger carries out heat exchange cold-producing medium, cold-producing medium after heating is delivered to air conditioning terminal from the refrigerant outlet output of First Heat Exchanger and is heated, promote room temperature, the GEOTHERMAL WATER of simultaneously lowering the temperature after heat exchange in First Heat Exchanger is more successively through the second heat exchanger, second evaporimeter, high-temperature geothermal well got back to by back-water valve (BWV),
(2), secondary heating system:
When the first temperature sensor detects water temperature lower than T1max but higher than certain setting value T1min, secondary heating equipment opened by controller, namely heating water circulating pump is opened, GEOTHERMAL WATER lift pump, circulating pump, second heat exchanger and the first water resource heat pump, GEOTHERMAL WATER in high-temperature geothermal well is delivered to the second heat exchanger through First Heat Exchanger by GEOTHERMAL WATER lift pump, simultaneously the cold-producing medium that transmits of air conditioning terminal is after the first water source heat pump heating circulation, refrigerating medium after its first evaporator end heat exchange enters the second heat exchanger, the refrigerating medium of low temperature and GEOTHERMAL WATER carry out heat exchange at the second heat exchanger, the refrigerating medium of low temperature is reentered the first water resource heat pump by heating and obtains the cold-producing medium after heating through heating circulation, cold-producing medium finally after heating enters air conditioning terminal and heats, promote room temperature, and through heat exchange cooling GEOTHERMAL WATER more successively through the second evaporimeter, high-temperature geothermal well got back to by back-water valve (BWV),
(3), three grades of heating systems:
When the second temperature sensor to detect in water temperature lower than certain setting value T2max but higher than certain setting value T2min, three grades of heating equipments opened by controller, namely heating water circulating pump is opened, GEOTHERMAL WATER lift pump and second water source heat pump, GEOTHERMAL WATER lift pump by the GEOTHERMAL WATER in high-temperature geothermal well through First Heat Exchanger, second heat exchanger is transferred to the second evaporimeter, second water source heat pump utilizes GEOTHERMAL WATER heat energy to heat the cold-producing medium that air conditioning terminal is delivered to second water source heat pump, cold-producing medium after heating is delivered to the cold-producing medium heat energy of air conditioning terminal more again, high-temperature geothermal well is got back to through back-water valve (BWV) again by the GEOTHERMAL WATER of lowering the temperature,
(4), GEOTHERMAL WATER drainage pattern:
When three-temperature sensor to detect in water temperature lower than certain setting value T3, close the second valve, controller opening water discharge system, namely the GEOTHERMAL WATER in high-temperature geothermal well emits by opening water discharge valve after First Heat Exchanger, the second heat exchanger, the second evaporimeter and draining valve;
(5), one-level heating, secondary are for the warm three grades modes of opening that heat simultaneously:
Step (1), (2) and (3) three kinds of modes are combined.
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| DE102013214891A1 (en) * | 2013-07-30 | 2015-02-05 | Siemens Aktiengesellschaft | Thermal engineering interconnection of a geothermal energy source with a district heating network |
| CN105737232A (en) * | 2016-04-19 | 2016-07-06 | 济南国海能源科技有限公司 | High-efficiency clean energy source heat supplying system using heat energy of hot dry rocks |
| EP3267118A1 (en) * | 2016-07-07 | 2018-01-10 | E.ON Sverige AB | Heating system |
| CN109539357A (en) * | 2018-11-21 | 2019-03-29 | 南京林业大学 | Step heats multi-energy complementation type water and recycles ground heating system host |
| CN113720029B (en) * | 2021-07-30 | 2023-10-03 | 西安新港分布式能源有限公司 | Geothermal energy ladder utilization system |
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| CN102425883A (en) * | 2011-11-10 | 2012-04-25 | 安徽日源环保能源科技有限公司 | Energy-saving system using heat recovery type water source heat pump unit and control method for energy-saving system |
| CN102809187A (en) * | 2012-08-14 | 2012-12-05 | 天津热建机电工程有限公司 | Geothermal energy-driving heat recovery system |
| CN202973314U (en) * | 2012-12-10 | 2013-06-05 | 安徽日源环保能源科技有限公司 | High-temperature geothermal water series connection heating system |
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