CN212964049U - Thermal efficiency testing device for cavitation heat energy heat exchanger - Google Patents
Thermal efficiency testing device for cavitation heat energy heat exchanger Download PDFInfo
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- CN212964049U CN212964049U CN202021194396.5U CN202021194396U CN212964049U CN 212964049 U CN212964049 U CN 212964049U CN 202021194396 U CN202021194396 U CN 202021194396U CN 212964049 U CN212964049 U CN 212964049U
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Abstract
The utility model discloses a thermal efficiency testing device of a cavitation heat energy exchanger, which comprises a cavitation heat energy exchanger, a hot water storage tank, an electric water pump and a power measuring instrument, wherein a first flow control valve and a first electromagnetic flow meter are sequentially arranged on a pipeline between a hot water outlet of the cavitation heat energy exchanger and a water inlet of the hot water storage tank, the device comprises a pressure transmitter for first pressure measurement and a platinum resistance electrode temperature sensor for first temperature measurement, wherein a second flow control valve, a second electromagnetic flow meter, a pressure transmitter for second pressure measurement and a platinum resistance electrode temperature sensor for second temperature measurement are sequentially arranged on a pipeline between a cold water inlet of a cavitation heat energy heat exchanger and an output port of an electric water pump, and a measuring end of a power measuring instrument is respectively connected with power supply input ends of the cavitation heat energy heat exchanger and the electric water pump through a first measuring circuit and a second measuring circuit. The thermal efficiency of the cavitation heat energy exchanger can be conveniently and rapidly calculated by substituting the test parameters into a formula.
Description
Technical Field
The utility model relates to a cavitation heat energy heat exchanger thermal efficiency testing arrangement belongs to cavitation heat energy heat exchanger thermal efficiency test technical field.
Background
The cavitation heat energy heat exchanger has the characteristics of high safety, compact equipment structure, direct installation and use outdoors, lower operating cost than the common coal-fired, fuel oil, fuel gas and electric boiler, no external circulating equipment, combination of heat production and heat medium conveying, system simplification, energy consumption reduction, high heat efficiency, high liquid temperature, no attenuation of heat efficiency after long-term operation, and the like, and is widely applied to the heat exchange fields of heating, liquid heating, homogenization and the like in different places. The product belongs to a liquid power heater, and the thermal efficiency of the product needs to be tested before the product is manufactured and leaves a factory and in the using process.
The heating principle of the cavitation heat energy exchanger is that the water is enabled to generate flow rate change under the normal pressure state through a water pump to release heat energy, no heating device is needed, and the cavitation heat energy exchanger is based on a liquid power heater. Compared with the common heater driven by coal-fired, oil-fired, gas-fired and electric boilers, the cavitation heat energy heat exchanger cannot directly and accurately test the heat efficiency by calculating the energy consumption. At present, only for the aspect of economic operation of an electric heating boiler system, a calculation method is provided for the thermal efficiency in China, but the working mechanism of the cavitation heat exchanger is obviously different from that of the cavitation heat exchanger, and the cavitation heat exchanger cannot be directly used for testing and evaluating the thermal efficiency of the cavitation heat exchanger.
SUMMERY OF THE UTILITY MODEL
To the not enough of current efficiency testing arrangement and test method in the test of cavitation heat energy heat exchanger thermal efficiency, the utility model aims to provide a cavitation heat energy heat exchanger thermal efficiency testing arrangement solves the problem that adopts traditional heating device thermal efficiency testing arrangement and method can't the accurate measurement cavitation heat energy heat exchanger thermal efficiency.
In order to realize the purpose of the invention, the technical proposal adopted by the utility model is as follows: the utility model provides a cavitation heat energy heat exchanger thermal efficiency testing arrangement, includes cavitation heat energy heat exchanger, hot water storage box, electric water pump and power measurement appearance, cavitation heat energy heat exchanger's hot water delivery port with install first flow control valve, first electromagnetic flowmeter, pressure transmitter for first pressure measurement and platinum resistance electrode temperature sensor for first temperature measurement on the pipeline between the water inlet of hot water storage box in proper order, cavitation heat energy heat exchanger's cold water inlet with install second flow control valve, second electromagnetic flowmeter, pressure transmitter for second pressure measurement and platinum resistance electrode temperature sensor for second temperature measurement on the pipeline between electric water pump's the delivery outlet in proper order, power measurement appearance's measuring end with cavitation heat energy heat exchanger's power input end is through first measuring circuit connection, power measurement appearance's measuring end with electric water pump's power input end is through second measuring circuit connection .
In the scheme, the input port of the electric water pump is connected with the cold water storage tank through a pipeline, and a first switch valve is installed on the pipeline between the electric water pump and the cold water storage tank.
In the above scheme, the hot water storage tank is connected with the cold water storage tank through a pipeline, and a second switch valve is arranged on the pipeline between the hot water storage tank and the cold water storage tank.
The invention has the beneficial effects that: (1) the device can quickly measure the flow parameters and temperature values of cold water flowing into the cavitation heat energy exchanger, the flow parameters and temperature values of hot water flowing out of the cavitation heat energy exchanger and the electric energy consumption of the whole device, and the thermal efficiency of the cavitation heat energy exchanger can be calculated by substituting the numerical values into a calculation formula. (2) Through install first ooff valve on the pipeline between electric water pump and cold water storage tank, when testing arrangement water circulating system trouble or maintenance, isolate system's part through first ooff valve. (3) Through installing the second ooff valve on the pipeline between hot water storage box and cold water storage box, after the water in the hot water storage box is in continuous heat dissipation cooling, flow into the cold water storage box through the pipeline and save and cool down, the water through the cooling in the cold water storage box is passed through electric pump and is continued to squeeze into cavitation heat energy heat exchanger cold water inlet, constitutes whole testing arrangement's water circulation system.
Drawings
Fig. 1 is the overall structure schematic diagram of the thermal efficiency testing device of the cavitation heat energy exchanger of the utility model.
In the figure: 1. a cavitation heat energy heat exchanger; 2. a hot water reservoir; 3. a cold water storage tank; 4. a power meter; 5. an electric water pump; 6. a first on-off valve; 7. a second flow control valve; 8. a second electromagnetic flow meter; 9. a second pressure-measuring pressure transmitter; 10. a second platinum resistance electrode temperature sensor for temperature measurement; 11. a first flow control valve; 12. a first electromagnetic flow meter; 13. a first pressure-measuring pressure transmitter; 14. a first platinum resistance electrode temperature sensor for temperature measurement; 15. a second on-off valve; 16. a second measurement circuit; 17. a first measurement circuit.
Detailed Description
In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention will be further described with reference to the following embodiments.
As shown in fig. 1, the utility model provides a cavitation heat energy heat exchanger thermal efficiency testing arrangement, its structure includes: the device comprises a cavitation heat energy heat exchanger 1, a hot water storage tank 2, an electric water pump 5 and a power measuring instrument 4, wherein a first flow control valve 11, a first electromagnetic flow meter 12, a first pressure transmitter 13 for pressure measurement and a first platinum resistance electrode temperature sensor 14 for temperature measurement are sequentially arranged on a pipeline between a hot water outlet of the cavitation heat energy heat exchanger 1 and a water inlet of the hot water storage tank 2, a second flow control valve 7, a second electromagnetic flow meter 8, a second pressure transmitter 9 for pressure measurement and a platinum resistance electrode temperature sensor 10 for second temperature measurement are sequentially arranged on a pipeline between a cold water inlet of the cavitation heat energy heat exchanger 1 and an output port of the electric water pump 5, an input port of the electric water pump 5 is connected with the cold water storage tank 3 through a pipeline, and a first switch valve 6 is arranged on a pipeline between the electric water pump 5 and the cold water storage tank 3, the hot water storage tank 2 is connected with the cold water storage tank 3 through a pipeline, and a second switch valve 15 is installed on the pipeline between the hot water storage tank 2 and the cold water storage tank 3. The measuring end of the power measuring instrument 4 is connected with the power supply input end of the cavitation heat energy heat exchanger 1 through a first measuring circuit 17, and the measuring end of the power measuring instrument 4 is connected with the power supply input end of the electric water pump 5 through a second measuring circuit 16.
The working principle of the testing device is as follows: water in the cold water storage tank 3 is pumped into a cold water inlet of the cavitation heat energy exchanger 1 through the electric water pump 5, and flow parameters and temperature values of the cold water flowing into the cavitation heat energy exchanger are measured through a second flow control valve 7, a second electromagnetic flow meter 8, a second pressure measuring pressure transmitter 9 and a second temperature measuring platinum resistance electrode temperature sensor 10; measuring the flow parameter and temperature value of the hot water flowing out of the cavitation heat energy exchanger through a first flow control valve 11, a first electromagnetic flow meter 12, a first pressure measuring pressure transmitter 13 and a first temperature measuring platinum resistance electrode temperature sensor 14; the power detector 4 connected with the power supply line of the electric water pump 5 and the cavitation heat energy heat exchanger 1 can measure the electric energy consumption of the whole device, when the water in the hot water storage tank 2 is continuously cooled, the water flows into the cold water storage tank 3 to be stored and cooled by opening the second switch valve 15, and the cooled water in the cold water storage tank 3 is continuously pumped into the cold water inlet of the cavitation heat energy heat exchanger 1 through the electric water pump 5 to form a water circulation system of the whole testing device. When the water circulation system of the test device is failed or overhauled, the system components are isolated by the first switch valve 6.
During testing, the whole testing device starts to normally operate, the deviation between the inlet water temperature and the outlet water temperature of the cavitation heat energy exchanger and a design value (rated value) is observed, and the temperature difference between the two positions and the design temperature value are not more than +/-5 ℃ (when the deviation between the average value of the actual outlet water temperature and the design value is more than minus 5 ℃, the measured boiler thermal efficiency is converted according to the GB/T10180 and 2017 industrial boiler thermal performance test procedure); the test working condition time of the cavitation heat exchanger is more than or equal to 1h, the values of the inlet temperature, the outlet temperature, the pressure and the flow rate of the cavitation heat exchanger are read and recorded once every 5min after the rated working condition is achieved in the process, and the power consumption of the cavitation heat exchanger from the beginning to the end of the test is recorded; and according to the obtained test data, calculating the thermal efficiency according to a positive balance measuring method and a thermal efficiency calculation formula of the electric heating boiler. According to the obtained test data, the thermal efficiency calculation is carried out according to a positive balance measuring method and a thermal efficiency calculation formula of the electric heating boiler, and the derived thermal efficiency calculation formula (thermal efficiency = output power/input rate) of the cavitation heat exchanger is as follows:
η =（Pout/Pe）·100%
ηc=（Pout/Ps）·100%
Pin = N/T
Pe=Pin·0.9
Pcav= Pin-Pcir
Ps = Pcav·0.9
Pout = V·ρ·Cp·Δt
△p = p1-p2
△t = t1-t2
tm =（t1+t2）/2
wherein:
eta-the electrothermal conversion efficiency of the cavitation heat energy exchanger percent.
ηc-cavitation thermal efficiency of the cavitation heat energy exchanger,%.
Pe -total effective power, kW.
Ps -cavitation pump shaft power, kW.
PcavThe cavitation pump inputs electric power, kW.
PoutThe total output thermal power of the cavitation heat energy heat exchanger is kW.
PinThe input thermal power of the cavitation heat energy heat exchanger is kW.
PcirThe thermal power of a circulating pump of the cavitation heat energy exchanger is kW.
NCavitationThe power consumption of the heat energy exchanger per hour is kW.
T is the electricity consumption time of the cavitation heat energy exchanger, h, measured.
p1The pressure of the water inlet end of the cavitation heat energy exchanger is kPa.
p2The pressure of the water outlet end of the cavitation heat energy exchanger is kPa.
Δ p-pressure drop, kPa, of the cavitation heat exchanger.
t1The temperature of the water outlet end of the cavitation heat energy exchanger is at the temperature of DEG C.
t2The temperature of the water inlet end of the cavitation heat energy exchanger is at the temperature of DEG C.
Delta t-water temperature difference, DEG C, of the cavitation heat energy exchanger.
tmAverage water temperature of the cavitation heat exchanger, deg.C.
CpThe specific heat of circulating water of the cavitation heat energy exchanger is kJ/(kg. K).
Rho-circulating water density of cavitation heat exchanger, kg/m3。
V-total volume of water filled in cavitation heat energy exchanger, m3。
The utility model relates to a relevant working part is the part that general standard spare or technical staff in the field know, and its structure and principle all are this technical staff all can learn or learn through the mode of conventional experiment through the technical manual, the utility model provides a problem be that the unable direct accurate problem of testing its thermal efficiency of consumption through the calculation energy of stage cavitation heat energy heat exchanger now. The utility model discloses an above-mentioned inter combination of part can reach under minimum area, accurate test cavitation heat energy heat exchanger thermal efficiency.
The basic principles and the main features of the invention and the advantages of the invention are shown above, and it is obvious to a person skilled in the art that the invention is not limited to the details of the above exemplary embodiments, but can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Moreover, it should be understood that although the description is provided in terms of embodiments, not every embodiment may include a separate embodiment, and such description is provided for clarity only, and those skilled in the art will recognize that the embodiments described herein may be combined as a whole to form other embodiments as would be understood by those skilled in the art.
Claims (3)
1. A thermal efficiency testing device of a cavitation heat energy exchanger is characterized by comprising the cavitation heat energy exchanger (1), a hot water storage tank (2), an electric water pump (5) and a power measuring instrument (4), wherein a first flow control valve (11), a first electromagnetic flow meter (12), a first pressure transmitter (13) for pressure measurement and a first platinum resistance electrode temperature sensor (14) for temperature measurement are sequentially arranged on a pipeline between a hot water outlet of the cavitation heat energy exchanger (1) and a water inlet of the hot water storage tank (2), a second flow control valve (7), a second electromagnetic flow meter (8), a second pressure transmitter (9) for pressure measurement and a second platinum resistance electrode temperature sensor (10) for temperature measurement are sequentially arranged on a pipeline between a cold water inlet of the cavitation heat energy exchanger (1) and an output port of the electric water pump (5), the measuring end of the power measuring instrument (4) is connected with the power supply input end of the cavitation heat energy heat exchanger (1) through a first measuring circuit (17), and the measuring end of the power measuring instrument (4) is connected with the power supply input end of the electric water pump (5) through a second measuring circuit (16).
2. The thermal efficiency testing device of the cavitation heat energy exchanger as claimed in claim 1, characterized in that the input port of the electric water pump (5) is connected with the cold water storage tank (3) through a pipeline, and a first switch valve (6) is installed on the pipeline between the electric water pump (5) and the cold water storage tank (3).
3. The cavitation heat energy exchanger thermal efficiency testing device as claimed in claim 2, characterized in that the hot water storage tank (2) is connected with the cold water storage tank (3) through a pipeline, and a second switch valve (15) is installed on the pipeline between the hot water storage tank (2) and the cold water storage tank (3).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021194396.5U CN212964049U (en) | 2020-06-24 | 2020-06-24 | Thermal efficiency testing device for cavitation heat energy heat exchanger |
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| CN202021194396.5U CN212964049U (en) | 2020-06-24 | 2020-06-24 | Thermal efficiency testing device for cavitation heat energy heat exchanger |
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| CN212964049U true CN212964049U (en) | 2021-04-13 |
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