Analysis Of Carbon Dioxide Heat Pump Water Heater (2)

introduced a single-class swing rotor Compressor Carbon dioxide Heat pump water heater

(See Figure 6). System power consumption rated 1.21kW, evaporator placed outside, can provide 65 ~ 90 hot water, reservoir

Water tank Capacity of 300 liters / 370 liters, its rated heating capacity of 4.5kW, standard conditions (outdoor air temperature of 16 / 12 , inlet water temperature 17 , water 65 ) COP up to 3.72, noise 45 dB. Meanwhile, Panasonic has also launched its own water tank capacity of 370 liters of carbon dioxide heat pump water heater. (See Figure 6)

Carbon dioxide heat pump water heater

Institute for Environmental Studies, University of Tokyo, Japan Jianfeng Wang and Eiji Hihara [8] on carbon dioxide heat pump water heater set up residence with the R22 model and a comparison operation heat pump water heater. Simulation results show that: carbon dioxide heat pump water heater heat pump water heater COP than R22; as with internal heat exchanger, the heat pump water heater will meet with a considerable level of R22, but the compressor outlet temperature will be significantly increased, the optimal condensation under pressure for heat also decreased significantly. As the simulation results without experimental verification, the model remains to be further improved. 3 carbon dioxide heat pump water heater problems and countermeasures of carbon dioxide heat pump water heater is the main problem facing continue to improve efficiency and keep costs down. Technological progress and industrialization, mass production is the main driving force to reduce costs, while efficiency is only dependent on technology. At present, the carbon dioxide heat pump water heater efficiency following a few key ways: new and efficient development and improvement of carbon dioxide compressor. For example, Sanyo has developed a two-stage rolling piston compressor, represented by two-stage compressor to make the structure more compact, more flexible system layout, and the two-stage compression would reduce the pressure, reduce leakage, and mechanical damage, can significantly improve system efficiency and compressor efficiency, compressor will be the development of a direction (see Figure 5). DENSO Corporation and other Japanese companies, Daikin is also working to develop new and efficient carbon dioxide compressor. (See Figure 5)

Sanyo two-stage rolling piston compressor Development of expansion compressor. In the carbon dioxide transcritical cycle, the lower part of the loss of expansion, is efficient and effective way to solve. Output power using expander driven compressor to complete the compression process, so that the composition of the expander and compressor integrated to form expansion compressor, compressor of this expansion will be the carbon dioxide cycle-specific components. high carbon dioxide transcritical cycle Heat Exchanger. For example, Sanyo has developed a new type to prevent re-icing heat exchanger. rational use of energy or low taste and explore renewable energy heating hot water supply and other methods of coupling. carbon dioxide heat pump water heaters, advanced control method. 4 Conclusion carbon dioxide heat pump water heater with the traditional

Gas Water Heater

Compared with low power consumption (typically about 30% of energy), the advantages of environmentally friendly; compared with the traditional heat pump water heater with hot water temperature range, can provide the advantages of high temperature hot water. Carbon dioxide heat pump and tank combinations can be used at night low power, improve the system economy. If we carbon dioxide heat pump water heater with heat storage system in combination, can reduce the tank volume, then the whole system more compact and lightweight. Development of carbon dioxide heat pump water heater is suitable for high-pressure compressor and durable high-heat exchanger and a good control strategy will be after the carbon dioxide heat pump water heater of the three key. Believe that as technology progresses, the carbon dioxide heat pump water heater will be its unique advantages, a water heater 21, the market's most dazzling star.

Analysis Of Carbon Dioxide Heat Pump Water Heater (2)

By: tianli

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