Air source heat pump selecting refrigerant consideration factor analysis

what call refrigerant?

refrigerant refrigerating agent, is the complete refrigeration cycle refrigeration system working medium. Refrigerant in transpiration in absorbing transpiration cooling by heat, heat transfer in the condenser to the surrounding air or water is condensed into liquid. Refrigerating machine with the help of the refrigerant conditions change, achieve the goal of refrigeration.

the basic request and the selection principle of refrigerant is what?

in steam tightening machine, all kinds of refrigerating machine for refrigerants have some request:

1) Critical temperature is higher, in room temperature or low temperature phase transition can attack. This is the basic request of refrigerant vapor in the refrigerator.

2) Suitable for saturated vapor pressure. Transpiration lower pressure best don't big condensing pressure cannot be too high, avoid refrigerating machine and equipment increased too much. Together, avoid austerity final temperature is too high and the gas transmission coefficient of tightening machine down.

3) Condensation temperature is low, avoid the refrigerant in the evaporation temperature setting. Gas pressure. Avoid brown air cooling system. Cold setting pressure and transpiration is also a to

4) Viscosity and density is smaller, in order to reduce the flow resistance loss of cooling system.

5) High thermal conductivity. The heat transfer coefficient of the heat exchanger to progress, reduce the heat transfer area and the metal material consumption

6) Adiabatic exponent is smaller, can make the tightening process power consumption is reduced, but high gas temperature at the end of the crunch.

7) Liquid heat capacity is small. Can reduce the loss of throttling process.

8) Improve the degree of thermal properties of the loop as large as possible.

9) Blasting, non-toxic, not burning, not can't afford to on metal corrosion effect, the solution and harmless to the human body.

10) Cheap, easy to get.

in addition, because modern environmental protection need to climate warming. Special emphasis on the use of refrigerant shouldn't damage the atmospheric ozone layer and caused the q global climate warming.

refrigerant selection principle is: under the premise of basic request in thoughts, also should contact thinking refrigeration compressed tectonic pattern and refrigerating machine use to determine what kind of working medium used. Such as: in the enclosed squeeze machine, the refrigerant into contact with the coil of the motor, so can't use the threat of ammonia kind will have a effect of refrigerants and copper. Household air-conditioning refrigerator refrigerant is expected in the non-toxic, not burning, not burst. So every - — The selection of kind of refrigerant is the result of comprehensive thinking. The so-called 'high temperature heat pump', it is related to the water temperature of market dominance now under 60 ℃ heat pump products. 'The high temperature heat pump' usually refers to use everything refrigerants, environment temperature above 0 ℃, heating water temperature in the 80 - Between 90 ℃ heat pump products. 'The high temperature heat pump' although in the heating water temperature as long as the progress of 20 degrees, but about heat pump as it is a great breakthrough.

although high temperature air source heat pump under the condition of high temperature, greatly attenuation performance, but its as a kind of high efficiency, environmental protection and energy saving heating skills can be used on all heating air conditioning and hot water supply system, and can be organic connection and other new energy skills, progress in comprehensive utilization of power.

follow national policy of promoting energy conservation and emissions reduction, and rising energy prices, with the influence of thermal energy saving in commercial and industrial category has increasingly expanded. Heat pump as a kind of energy-saving skills, while in terms of energy saving, environmental protection has the advantages of the common but in the use of water temperature is higher under the condition of economy is bad, limiting the common promote the use of air source heat pump.

high temperature air source heat pump skills is arises at the historic moment under this set, high temperature heat pump hot water heating water temperature up to 85 ℃ above, greatly widened the scope of skills in the use of air source heat pump, with the strength of high temperature heat pump for discussion of the deep and the constantly emerging of the new skill, high temperature heat pump skills will continue to grow, its operating power, water temperature, using range will also continue to improve, agricultural and sideline products processing industry, beverage industry, electroplating, textile dyeing, dyeing industry of the air conditioning heating drying industry, such as the disinfection of bath industry needs.

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Further dialogue of Arkool between the approaches, the chapter concludes, could lead to actionable advice on more robust policies that drive both structural change and competitiveness upgrading.