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Common heat exchange and heat calculation formula
Common heat exchange and heat calculation formula

Focusing on the industrial chillers of rearch and production, as small do not know too sophisticated technology, we will hand a data for the convenience of customers and an entry-level sales, hoping to visit our website friends if you like, please leave a message to encourage:

Heat units commonly used : kW (KW) (Kcal), calories, kJ (KJ), tons of cold
(cold tons divided into American ton and Japan ton, commonly used American ton)

1US.RT=3.517KW
1KW=860Kcal
1KW=3600KJ
The calculation formula of heat:
Common concepts: 1KG water increased by 1 ℃ heat and required for 1Kcal
Q=Cm△t
Q: Said the endothermic or exothermic (KJ)
C: Said material specific heat (KJ/kg. C)
M: Said the quality of the material (KG)
△t：Indicate changes in temperature (c)
For example: how much heat need the number of 1 tons of water for one hour rise to 10 ℃?
Q吸=Cm△t=4.2KJ/kg.℃*1000kg*10℃=42000KJ=11.6KW
Q =Cm △ t=4.2KJ/kg. ℃ *1000kg*10 ℃ =42000KJ=11.6KW
We can also be based on the above concepts to calculate: 1KG water increased by 1 ℃ heat the required for 1Kcal
Q=M*△t=1000*10=10000Kcal=11.6KW
Q =M* △ t=1000*10=10000Kcal=11.6KW

This formula is only suitable for water,  it is not suitable for i other materials ,this formula is very fit like the industrial cooling water machine,it often deal with heat and water.
There is also a calculation formula of heat in the cold water machine industry (i.e. cold water machine rotary type)

Refrigerating capacity (KW) = chilled water flow (L/S) *4.187 (KJ/kg. ℃) *
*(temperature coefficient for refrigeration effect water cooling, air cooling of the difference, if choose air-cooled chiller, coefficient of 1.3, if the water cooling machine, the effect will be better coefficient is 1.1)