CN210861901U - Variable working condition energy efficiency test system of cold water supply system - Google Patents
Variable working condition energy efficiency test system of cold water supply system Download PDFInfo
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- CN210861901U CN210861901U CN201921855898.5U CN201921855898U CN210861901U CN 210861901 U CN210861901 U CN 210861901U CN 201921855898 U CN201921855898 U CN 201921855898U CN 210861901 U CN210861901 U CN 210861901U
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Abstract
The utility model relates to a variable working condition energy efficiency test system of a cold water supply system, which comprises a cold water supply device and a cooling water supply device; the utility model discloses an increase flowmeter, temperature sensor and plate heat exchanger newly between cold water supply device and cooling water supply device, the cooling water in the cooling water cistern and the cold water of cooling water set carry out the heat transfer through plate heat exchanger, obtain the refrigerating output of cooling water set through the anti-cold volume of measuring plate heat exchanger to the realization carries out the accuracy test to the efficiency of cooling water set. Compared with the prior art, the utility model has the advantages of energy-conservation, construction convenience, measurement accuracy, running cost low.
Description
Technical Field
The utility model belongs to the technical field of the energy, especially, relate to a variable working condition efficiency test system of cold water supply system.
Background
In industrial production and life, cold water for air conditioners and processes is gradually becoming an indispensable energy source. An industrial cold water system is mainly composed of a cold and heat source (a cold water unit), a pipeline, a cooling tower, a water pump and a tail end device. For users, the stability of equipment stable operation and energy supply is very important, but the economical efficiency of the operation of a cold water system is easily ignored.
Along with the progress of science and technology, the energy-saving consciousness of people is gradually improved, the overall energy consumption system of the water cooling system has a mature scheme, more and more water cooling systems are matched with energy efficiency monitoring platforms, and the overall energy efficiency and energy consumption of the refrigerating station house are recorded and analyzed. However, a general energy consumption monitoring system only focuses on overall energy consumption, the energy efficiency test and application of a single device are not complete enough, and meanwhile, sufficient attention is not paid to the variable working condition operation energy efficiency of a cold water system.
The energy efficiency of different loads and working conditions of the water cooling system is greatly different. However, for system users, the design of the cold water system basically does not have the condition of variable working condition energy efficiency test, and design houses and manufacturers can not provide detailed test data. During supply, data such as flow temperature difference of a water supply main pipe are used for testing, external heat load is difficult to adjust and stabilize, the whole system is large, corresponding speed of temperature is low, a test result is often unsatisfactory, and guiding significance in practical application is lacked.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a stable, accurate variable working condition efficiency test system of cold water supply system and application thereof in order to overcome the unsafe defect of cooling water set efficiency test that above-mentioned prior art exists.
The purpose of the utility model can be realized through the following technical scheme:
a variable working condition energy efficiency test system of a cold water supply system comprises a cold water supply device and a cooling water supply device; the cold water supply device comprises a water collector, a variable-frequency cold water pump and a cold water unit which are sequentially connected with a workshop cold water return water pipeline through pipelines, wherein a cold water output end of the cold water unit is connected with a workshop cold water supply pipeline, a first switching valve is arranged on a pipeline between the workshop cold water return water and the variable-frequency cold water pump, and a second switching valve is arranged on a pipeline between a cold water output end of the cold water unit and workshop cold water supply; the cooling water supply device comprises a first cooling tower, a cooling water reservoir connected with the output end of the first cooling tower, the output end of the cooling water reservoir is connected with the cooling water input end of the water chilling unit through a variable frequency cooling pump, and the cooling water output end of the water chilling unit is connected with the first cooling tower;
the device of the utility model also comprises a heat exchanger, the cooling water supply device also comprises a second cooling tower with an output end connected with the cooling water reservoir and a variable frequency cooling pump group with an input end connected with the cooling water reservoir;
the cold water output end of the water chilling unit is connected with the water collector through a circulating pipeline, a third switching valve is arranged on the circulating pipeline, and a fourth switching valve is arranged between the third switching valve and the water collector; a cold water inlet and a cold water outlet of the heat exchanger are connected with a circulating pipeline and are connected with the third switching valve in parallel;
a cooling water inlet of the heat exchanger is connected with a variable-frequency cooling pump set, and cooling water from a cooling water outlet of the heat exchanger returns to a cooling water reservoir;
a first temperature sensor and a second temperature sensor are respectively arranged on a cold water inlet pipeline and a cold water outlet pipeline of the heat exchanger; a flowmeter is arranged on the circulating pipeline; and the water chilling unit is provided with an electric quantity meter.
And a cooling water outlet of the heat exchanger is connected with the second cooling tower.
The heat exchanger is a plate heat exchanger.
The first switching valve, the second switching valve and the fourth switching valve are electrically operated valves; the third switching valve is a manual valve.
The cold water supply device is provided with a plurality of sets which are connected in parallel; each set of cold water supply device is respectively matched with a set of first cooling tower and a set of variable-frequency cooling pump.
The sets of cold water supply devices share a water collector.
The cold water supply device is provided with two sets.
And the cooling water outlet pipeline and the cooling water inlet pipeline of the heat exchanger are both connected with a cooling water conveying pipeline for conveying cooling water to external water-using equipment.
The flowmeter is an electromagnetic flowmeter.
And the fan motor of the cooling tower is a variable frequency motor.
And electric quantity meters are respectively distributed on the electric equipment in the variable working condition energy efficiency test system.
The utility model discloses a variable operating mode efficiency test system of cold water supply system's application process in test cooling water set efficiency includes following step:
(a) closing the first switching valve, the second switching valve and the third switching valve, and closing the fourth switching valve;
(b) starting a water chilling unit and a variable-frequency cold water pump of a cold water supply device to be tested, a first cooling tower, a variable-frequency cooling pump, a second cooling tower and a variable-frequency cooling pump set which are matched with the cold water supply device to be tested, so that cooling water output by the variable-frequency cooling pump set and cold water output by the water chilling unit exchange heat in a heat exchanger;
(c) measuring the temperatures of a cold water inlet and a cold water outlet of the heat exchanger through a first temperature sensor and a second temperature sensor, measuring the flow of cold water in the water chilling unit through a flowmeter, and calculating to obtain the cooling capacity Q at the heat exchanger, wherein the cooling capacity Q is the refrigerating capacity of the water chilling unit; calculating according to the power consumption W of the water chilling unit and the cold discharge quantity Q to obtain the energy efficiency of the water chilling unit;
(d) energy efficiency test under different working conditions
Adjusting the heat load of a cold water supply device by adjusting the frequency of the variable-frequency cooling pump set, repeating the step (c), and testing the energy efficiency of the cold water unit under different heat loads;
adjusting the temperature of the cooling water reservoir by adjusting the motor frequency of the first variable-frequency cooling tower and the second variable-frequency cooling tower and opening and closing the motor, repeating the step (c), and measuring the energy efficiency of the water chilling unit under the condition of different cooling water temperatures;
adjusting the cooling water flow of the water chilling unit by adjusting the frequency of the variable-frequency cooling pump, repeating the step (c), and measuring the energy efficiency of the water chilling unit under different cooling water flow conditions;
adjusting the cold water flow of the water chilling unit by adjusting the frequency of the variable-frequency cold water pump, repeating the step (c), and measuring the energy efficiency of the water chilling unit under different cold water flow conditions;
and (4) repeating the step (c) by adjusting the set temperature change of the cold water outlet of the water chilling unit, and measuring the energy efficiency of the water chilling unit at the set temperature of the evaporator outlet of different water chilling units.
The utility model discloses a theory of operation does:
when the system normally operates, the first switching valve and the second switching valve are opened, the fourth switching valve is closed, the variable-frequency cold water pump, the water chilling unit, the first cooling tower and the second cooling tower are opened, and the cold water supply device and the cooling water supply device start to operate at the moment to provide cold water for a workshop and supply water for other cooling water equipment.
When the energy efficiency of the water chilling unit needs to be tested, the cold water supply device is disconnected with a workshop system, the first switching valve, the second switching valve and the third switching valve are closed, and the fourth switching valve is opened; the method comprises the following steps of starting a water chilling unit and a variable-frequency cold water pump of a cold water supply device to be tested, and carrying out heat exchange on cooling water output by a variable-frequency cooling pump set and cold water output by the water chilling unit in a heat exchanger by a first cooling tower, a variable-frequency cooling pump, a second cooling tower and a variable-frequency cooling pump set matched with the cold water supply device to be tested, wherein the flow of the cold water comprises the variable-frequency cold water pump, the water chilling unit, a plate type heat exchanger and a water collector, and the cold water returns to the variable-frequency. The plate heat exchanger is internally provided with cooling water supplied by the variable-frequency cooling pump set, cold water and the cooling water are subjected to heat transfer in the plate heat exchanger, the running load of the unit is maintained, the load capacity can be adjusted at any time, and then the energy efficiency of the water chilling unit under different conditions is tested according to the application method.
Compared with the prior art, the utility model has the advantages of it is following:
(1) the utility model can test the running efficiency of the water chilling unit under the variable working condition, and provides data for the performance evaluation of the water chilling unit and the water chilling system; the method can provide a basis for the optimization and adjustment of actual operation, accumulate operation energy efficiency data, and supply cold water in a workshop according to the optimal energy efficiency of the unit according to different loads; the power consumption of the system is reduced, and the operation cost is reduced;
(2) during testing, the refrigerating capacity of the water chilling unit is transmitted to cooling water, but the refrigerating capacity is not wasted, all the cooling water is in the same water pool, the refrigerating capacity of the water chilling unit is used for adjusting the temperature of the cooling water, other cooling water using systems are synchronously supplied, and energy waste caused by a heat source testing method by using external energy sources is avoided.
(3) The utility model discloses it is less to the device repacking that has now, the better most pipeline that has utilized former system, construction convenience, it is convenient to reform transform current cold water supply system, is accepted by the user easily, has great economic benefits.
Drawings
Fig. 1 is a schematic structural view of the present invention in embodiment 1;
fig. 2 is a schematic structural view of the present invention in embodiment 2;
in the figure, 1 is a water chilling unit, and 2 is a variable frequency cold water pump; 3 is a variable frequency cooling pump; 4 is a first cooling tower; 5 is a plate heat exchanger; 6 is a variable frequency cooling pump group; 7 is a second cooling tower; 8 is a flowmeter; 9 is a first temperature sensor; 10 is a second temperature sensor; 11 is a third switching valve; 12 is a second switching valve; 13 is a first switching valve; 14 is a fourth switching valve; 15, cold water return in a workshop; 16, supplying cold water for a workshop; 17 is cooling water for sending other equipment; 18 is a water collector, 19 is a water chilling unit a, and 20 is a variable frequency cold water pump a; 21 is a variable frequency cooling water pump a; 22 is a first cooling tower a, 23 is a water chilling unit b, and 24 is a variable-frequency cold water pump b; 25 is a variable frequency cooling water pump b; a first cooling tower b is shown at 26, and a cooling water reservoir is shown at 27.
Detailed Description
The present invention will be described in detail with reference to the following embodiments. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that various changes and modifications can be made by one skilled in the art without departing from the spirit of the invention. These all belong to the protection scope of the present invention.
Example 1
A variable working condition energy efficiency testing system of a cold water supply system is shown in figure 1 and comprises a cold water supply device, a cooling water supply device and a plate heat exchanger 5, wherein the cold water supply device supplies cold water for a workshop, and the cooling water supply device supplies water for other cooling water equipment.
The cold water supply device comprises a water collector 18, a water chilling unit 1, a variable-frequency cold water pump 2 and a variable-frequency cooling pump 3 which are sequentially connected, wherein the water collector 18 is connected with a workshop cold water return water 15 pipeline, a first switching valve 13 is arranged on a pipeline between the water collector 18 and the workshop cold water return water 15 pipeline, a cold water output end of the water chilling unit 1 is connected with a workshop cold water supply water 16 pipeline, and a second switching valve 12 is arranged on a pipeline between the water chilling unit 1 and the workshop cold water supply water 16.
The cooling water supply device comprises a first cooling tower 4, a second cooling tower 7, a cooling water reservoir 27, a variable-frequency cooling pump set 6 and a variable-frequency cooling pump 3, wherein the output end of the first cooling tower 4 is connected with the cooling water reservoir 27, the output end of the cooling water reservoir 27 is connected with the cooling water input end of the water chilling unit 1 through the variable-frequency cooling pump 3, and the cooling water output end of the water chilling unit 1 is connected with the first cooling tower 4; the output end of the second cooling tower 7 is connected with a cooling water reservoir 27, and the input end of the variable frequency cooling pump unit 6 is connected with the cooling water reservoir 27.
The cold water output end of the water chilling unit 1 is connected with the water collector 18 through a circulating pipeline, a third switching valve 11 is arranged on the circulating pipeline, and a fourth switching valve 14 is arranged between the third switching valve 11 and the water collector 18; a cold water inlet and a cold water outlet of the plate heat exchanger 5 are connected with the circulating pipeline and are connected with the third switching valve 11 in parallel; and a cooling water inlet of the plate heat exchanger 5 is connected with a variable-frequency cooling pump set 6, a cooling water outlet is connected with a second cooling tower 7, and a flow meter is arranged on a cooling water inlet pipeline of the plate heat exchanger 5. A first temperature sensor 9 and a second temperature sensor 10 are respectively arranged on a cold water inlet pipeline and a cold water outlet pipeline of the plate heat exchanger 5; a flowmeter 8 is arranged on the circulating pipeline, and the flowmeter 8 is arranged between the third switching valve 11 and the fourth switching valve 14; all the electric equipment in the water chilling unit 1 and the system device are respectively provided with an electric quantity meter, namely a multifunctional electric meter.
In this embodiment, the first switching valve 13, the second switching valve 12, and the fourth switching valve 14 are electrically operated valves; the third switching valve 11 is a manual valve; the flowmeter 8 is an electromagnetic flowmeter, and a fan motor of the cooling tower is a variable frequency motor.
The functions of each device in the system of the embodiment are as follows:
a water chilling unit 1: cold water for air conditioner is prepared.
Frequency conversion cold water pump 2: and conveying cold water prepared by the cold water unit.
Frequency conversion cooling pump 3: and cooling water of the water chilling unit is provided.
First cooling tower 4: the heat brought out by the cooling water from the condenser of the water chilling unit is dissipated, and the temperature of the cooling water is adjusted.
Plate heat exchanger 5: the cooling water exchanges heat with cold water and is combined with a variable-frequency cooling water pump set to provide stable heat load for a cold water system.
Frequency conversion cooling pump package 6: the cooling water is provided for other cooling water using equipment, and primary side water supply is also replaced for the plate after transformation, so that a heat source is provided.
Temperature sensors (first temperature sensor 9 and second temperature sensor 10): and (4) measuring the temperature of a cold water inlet and a cold water outlet of the plate heat exchanger.
A flow meter: the cold water and cooling water flow rates were measured.
A valve: the system is switched.
The working principle of the embodiment is as follows:
when the system normally operates, the first switching valve 13 and the second switching valve 12 are opened, the fourth switching valve is closed 14, the variable-frequency cold water pump 2, the water chilling unit 1, the first cooling tower 4 and the second cooling tower 7 are opened, and at the moment, the cold water supply device and the cooling water supply device start to operate to provide cold water for a workshop and supply water for other cooling water equipment.
When the energy efficiency of the water chilling unit needs to be tested, the cold water supply device is disconnected with a workshop system, the first switching valve 13, the second switching valve 12 and the third switching valve 11 are closed, and the fourth switching valve 14 is opened; the method comprises the steps that a water chilling unit 1 and a variable-frequency cold water pump 2 of a cold water supply device to be tested are started, a first cooling tower 4, a variable-frequency cooling pump 3, a second cooling tower 7 and a variable-frequency cooling pump unit 6 which are matched with the cold water supply device to be tested are started, cooling water output by the variable-frequency cooling pump unit 6 and cooling water output by the water chilling unit 1 exchange heat in a plate type heat exchanger 5, and the flow of the cooling water at the moment is that the variable-frequency cold water pump 2, the water chilling unit 1, the plate type heat exchanger 5 and a water collector 18 return to the variable-frequency cold water. The plate heat exchanger 5 is internally provided with cooling water supplied by a variable-frequency cooling pump set, cold water and the cooling water are subjected to heat transfer in the plate heat exchanger, the running load of the unit is maintained, the load capacity can be adjusted at any time, and then the energy efficiency of the water chilling unit under different conditions is tested according to the application method. The temperature of a cold water inlet and a cold water outlet of the heat exchanger is measured through a first temperature sensor 9 and a second temperature sensor 10, the flow rate of cold water in the water chilling unit 1 is measured through a flowmeter 8, and the cooling capacity Q at the heat exchanger is obtained through calculation, wherein the cooling capacity Q is the refrigerating capacity of the water chilling unit 1; and calculating the energy efficiency 9(COP) of the water chilling unit 1 according to the power consumption W of the water chilling unit 1 and the refrigeration capacity Q.
The specific test items and test methods are as follows:
a, regulating the heat load of a cold water supply device by regulating the frequency of a variable-frequency cooling pump set, repeating the step c, and testing the energy efficiency of the cold water unit 1 under different heat loads;
b, regulating the temperature of the cooling water reservoir 27 by regulating the motor frequency of the first variable-frequency cooling tower and the second variable-frequency cooling tower and opening and closing the motors, repeating the step c, and measuring the energy efficiency of the water chilling unit 1 under the condition of different cooling water temperatures;
c, adjusting the cooling water flow of the water chilling unit 1 by adjusting the frequency of the variable-frequency cooling pump, repeating the step c, and measuring the energy efficiency of the water chilling unit 1 under different cooling water flow conditions;
g, adjusting the cold water flow of the water chilling unit 1 by adjusting the frequency of the variable-frequency cold water pump 2, repeating the step c, and measuring the energy efficiency of the water chilling unit 1 under different cold water flow conditions;
and d, repeating the step c by adjusting the set temperature change of the cold water outlet of the water chilling unit 1, and measuring the energy efficiency of the water chilling unit 1 at the set temperature of the evaporator outlet of different water chilling units 1.
The system of the embodiment is not limited to testing the energy efficiency of the water chilling unit, all the matched equipment has electric quantity metering, the energy consumption of the water chilling unit under different working conditions can be tested, and empirical data are accumulated for subsequent operation.
The device of the embodiment can test the running efficiency of the water chilling unit under the variable working condition, provides data for performance evaluation of the water chilling unit and the water chilling system, provides a basis for optimization and adjustment of actual running, accumulates running energy efficiency data, and can supply according to the optimal energy efficiency of the unit according to different loads when supplying cold water in a workshop, so that the power consumption of the system is reduced, and the running cost is reduced. The system is little in change, a platen heat exchanger, valves and a flowmeter are additionally arranged for providing stable heat load for a cold water system to carry out energy efficiency test, the newly-added part is shown in a dotted line frame in figure 1, most pipelines of the original system are used, and the construction is convenient. During the test, the refrigerating output of the water chilling unit is transmitted to the cooling water, but the refrigerating output is not wasted, because the cooling water coming out of the plate heat exchanger returns to the cooling water reservoir through the second cooling tower, all the cooling water is in the same water pool, the refrigerating output of the water chilling unit is used for adjusting the temperature of the cooling water, and other cooling water systems are synchronously supplied. The waste of the test method of using an external energy source to provide a heat source is avoided.
Example 2
The main structure of embodiment 2 is the same as that of the embodiment, except that the apparatus of the embodiment includes two sets of cold water supply devices, and the two sets of cold water supply devices share one water collector 18, as shown in fig. 2.
The two sets of cold water supply devices are respectively a first cold water supply device and a second cold water supply device which are connected in parallel, wherein the first cold water supply device comprises a variable-frequency cold water pump a 20, a cold water unit a 19 and a variable-frequency cooling water pump a21 which are sequentially connected, the variable-frequency cold water pump a 20 is connected with the water collector 18, the variable-frequency cooling water pump a21 is connected with the cooling water reservoir 27, and a first cooling tower a 22 matched with the cold water unit a 19 is arranged in the cooling water supply device.
The second cold water supply device comprises a variable-frequency cold water pump b 24, a cold water unit b 23 and a variable-frequency cooling water pump b 25 which are sequentially connected, the variable-frequency cold water pump b 24 is connected with the water collector 18, the variable-frequency cooling water pump b 25 is connected with a cooling water reservoir 27, and a first cooling tower b 26 matched with the cold water unit b 23 is arranged in the cooling water supply device.
During testing, the first cold water supply device and the second cold water supply device are respectively tested by opening the corresponding first cooling tower, the variable-frequency cooling pump, the water chilling unit and the variable-frequency cold water pump.
The foregoing description of the specific embodiments of the invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by those skilled in the art within the scope of the appended claims without departing from the spirit of the invention.
Claims (9)
1. A variable working condition energy efficiency test system of a cold water supply system comprises a cold water supply device and a cooling water supply device; the cold water supply device comprises a water collector (18), a variable-frequency cold water pump (2) and a cold water unit (1), wherein the water collector is sequentially connected with a workshop cold water return water (15) through a pipeline, the cold water output end of the cold water unit (1) is connected with a workshop cold water supply (16) through a pipeline, a first switching valve (13) is arranged in the pipeline between the workshop cold water return water (15) and the variable-frequency cold water pump (2), and a second switching valve (12) is arranged in the pipeline between the cold water output end of the cold water unit (1) and the workshop cold water supply (16); the cooling water supply device comprises a first cooling tower (4), a cooling water reservoir (27) connected with the output end of the first cooling tower (4), wherein the output end of the cooling water reservoir (27) is connected with the cooling water input end of the water chilling unit (1) through a variable frequency cooling pump (3), and the cooling water output end of the water chilling unit (1) is connected with the first cooling tower (4);
it is characterized in that the preparation method is characterized in that,
the cooling water supply device also comprises a heat exchanger, a second cooling tower (7) with an output end connected with a cooling water reservoir (27), and a variable-frequency cooling pump set (6) with an input end connected with the cooling water reservoir (27);
the cold water output end of the cold water unit (1) is connected with the water collector (18) through a circulating pipeline, a third switching valve (11) is arranged on the circulating pipeline, and a fourth switching valve (14) is arranged between the third switching valve (11) and the water collector (18); the cold water inlet and the cold water outlet of the heat exchanger are connected with a circulating pipeline and are connected with the third switching valve (11) in parallel;
a cooling water inlet of the heat exchanger is connected with a variable-frequency cooling pump set (6), and cooling water from a cooling water outlet of the heat exchanger returns to a cooling water reservoir (27);
a first temperature sensor (9) and a second temperature sensor (10) are respectively arranged on a cold water inlet pipeline and a cold water outlet pipeline of the heat exchanger; a flowmeter (8) is arranged on the circulating pipeline; the water chilling unit (1) is provided with an electric quantity meter.
2. The variable-operating-condition energy efficiency testing system of the cold water supply system is characterized in that a cooling water outlet of the heat exchanger is connected with a second cooling tower (7).
3. A variable-regime energy efficiency test system for a cold water supply system according to claim 1, wherein the heat exchanger is a plate heat exchanger (5).
4. The variable working condition energy efficiency testing system of the cold water supply system according to claim 1, characterized in that the first switching valve (13), the second switching valve (12) and the fourth switching valve (14) are electrically operated valves; the third switching valve (11) is a manual valve.
5. The variable working condition energy efficiency testing system of the cold water supply system according to claim 4, characterized in that the cold water supply device is provided with a plurality of sets which are connected in parallel; each set of cold water supply device is respectively matched with a set of first cooling tower (4) and a set of variable-frequency cooling pump (3); the sets of cold water supply devices share a water collector (18).
6. The system for testing the variable working condition energy efficiency of the cold water supply system according to claim 5, wherein two sets of cold water supply devices are provided.
7. The system for testing the variable working condition energy efficiency of the cold water supply system according to claim 1, wherein a cooling water conveying pipeline for conveying cooling water to external water using equipment is connected to the cooling water outlet pipeline and the cooling water inlet pipeline of the heat exchanger.
8. The variable working condition energy efficiency testing system of the cold water supply system according to claim 1, characterized in that the flow meter (8) is an electromagnetic flow meter, and the fan motor of the cooling tower is a variable frequency motor.
9. The variable working condition energy efficiency testing system of the cold water supply system according to claim 1, wherein electric devices in the variable working condition energy efficiency testing system are respectively provided with electric quantity meters.
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| CN201921855898.5U CN210861901U (en) | 2019-10-31 | 2019-10-31 | Variable working condition energy efficiency test system of cold water supply system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110671869A (en) * | 2019-10-31 | 2020-01-10 | 长沙经济技术开发区祥原动力供应有限公司 | Variable working condition energy efficiency testing system of cold water supply system and application thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110671869A (en) * | 2019-10-31 | 2020-01-10 | 长沙经济技术开发区祥原动力供应有限公司 | Variable working condition energy efficiency testing system of cold water supply system and application thereof |
| CN110671869B (en) * | 2019-10-31 | 2023-11-07 | 长沙经济技术开发区祥原动力供应有限公司 | Variable working condition energy efficiency test system of cold water supply system and application thereof |
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