Taizhou Free-Energy Development Co., Ltd.

heat pump

Type:
Air Source Heat Pump
Installation:
Freestanding
Storage / Tankless:
Instant / Tankless
Housing Material:
Stainless Steel
Use:
Bathroom
Certification:
CE
heat pump
 
Detailed Description
 


Air-source heat pumps
WITH TUV certificate

Air-source heat pumps

Working principle:

Air source heat pumps are relatively easy (and inexpensive) to install and have therefore historicall

 been the most widely used heat pump type. However, they suffer limitations due to their use of the 

outside air as a heat source or sink. The higher temperature differential during periods of extreme 

cold or heat leads to declining efficiency, as explained above. In mild weather, COP may be around 

4.0, while at temperatures below around −8 °C (17 °F) an air-source heat pump can achieve a COP of 2.5 or better, which is considerably more than the COP that may be achieved by conventional heating systems. The average COP over seasonal variation is typically 2.5-2.8,[9] with exceptional models able to exceed 6.0 (2.8 kW).

 

The working fluid, in its gaseous state, is pressurized and circulated through the system by a 

compressor. On the discharge side of the compressor, the now hot and highly pressurized gas is 

cooled in a heat exchanger, called a condenser, until it condenses into a high pressure, moderate

 temperature liquid. The condensed refrigerant then passes through a pressure-lowering device like an expansion valve, capillary tube, or possibly a work-extracting device such as a turbine. This device then passes the low pressure,(almost) liquid refrigerant to another heat exchanger, the evaporator where the refrigerant evaporates into a gas via heat absorption. The refrigerant then returns to the compressor and 

the cycle is repeated.

 In such a system it is essential that the refrigerant reach a sufficiently high temperature when

compressed, since the second law of thermodynamics prevents heat from flowing from a cold 

fluid to a hot heat sink. Practically, this means the refrigerant must reach a temperature greater 

than the ambient around the high temperature heat exchanger. Similarly, the fluid must reach 

a sufficiently low temperature when allowed to expand, or heat cannot flow from the cold region

 into the fluid, i.e. the fluid must be colder than the ambient around the cold temperatureheat exchanger. In particular, the pressure difference must be great enough for the fluid to condens

 at the hot side and still evaporate in the lower pressure region at the cold side. The greater the

 temperature difference, the greater the required pressure difference, and consequently the 

more energy needed to compress the fluid. Thus as with all heat pumps, the energy efficiency 

(amount of heat moved per unit of input work required) decreases with increasing temperature

 difference.

 


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Company information:
    Taizhou Free-Energy Development Co., Ltd. established on 2007 in Japan. We is an exporter of China (Mainland) Energy Projects products.    Our products always sell well in the worldwide markets, including North America South America Eastern Europe Southeast Asia Africa Oceania Mid East Eastern Asia Western Europe. We are known for our fine quality, uniqueness, and service. We grow with quality!    We are glad to invite you to be our value partner!For more information visit our website at www.free-energy.com.cn!
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Send Inquiry to this Supplier
 
Taizhou Free-Energy Development Co., Ltd.
Mr. xinshao liang
Xiazhuanglu Village, Tongyu Street Luqiao
0086-0576-82788788
13957636668

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