1．   Temperature of heat exchanger

2．   In the evaporator superheat is usually 5-10 ℃ (degree of superheat is not the same as suction temperature, will vary considerably in fission machine or device at low temperature), the supercooling degree in the condenser is usually 5-8 ℃.

3．   Evaporator head-on wind speed is generally 1.5-3 m/s, condenser is for 2-3 m/s, the narrowest surface wind speed is not more than 6 m/s. Most head on wind speed with 2.5 m/s.

4．   tube diameter and thickness 

5．   Line spacing multiply by array pitch, generally use the form of equilateral triangle cross compound. Such as 25.4x22mm , 25x21.65mm etc

6．   Fin：average thickness is 0.095 0.3 mm, spacing is 1.1-2.5 mm,

7．   Line structure: evaporator generally for two to six rows, condenser for 1-6 rows.

8．   Flow design

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