On the calculation of the maximum heat discharge capacity of evaporative condensers
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Our company plans to use 5 screw-type refrigeration compressors, each equipped with an evaporative condenser. The rated power of the chiller is 680 kW, and its cooling capacity is 2,000,000 kcal/h. How can the maximum heat rejection capacity of each evaporative condenser be calculated? Thank you!
I have to do it myself, hehe! It’s urgent; I hope those who understand can help!!
Generally, large chiller manufacturers also provide evaporative condensers, and they can supply the relevant data – contact them right away! Or you can directly look for specialized manufacturers of evaporative condensers; just search online – there are many of them. This post was last edited by lxq700918 on 2008-12-21 11:47.]
That’s right; we have already been in contact with Wuhan New World, and future tenders will also be conducted in a unified manner. We just want to learn more and understand better how to carry out the calculations!!
(1) Confirm operating conditions: condensation temperature, wet-bulb temperature. (2) Calculate the total heat discharge from the system to the condenser. (3) Check the technical specifications table provided by the manufacturer and select the heat discharge correction coefficient. (4) The total heat discharge multiplied by the correction factor gives the condensing load under operating conditions. (5) Consult the selection table provided by the manufacturer and choose those with a heat discharge capacity greater than or equal to the corrected heat discharge capacity value.
The heat rejection capacity of each evaporative condenser is 3010 KW
1. First, determine the compressor shaft power and cooling load； 2. Determine the heat rejection required for evaporative cooling, which is the compressor shaft power plus the cooling load ； 3. The maximum heat load of evaporative cooling is related to the wet-bulb temperature of the air; manufacturers provide equipment with a heat load appropriate for the wet-bulb temperature during summer ； 4. The maximum heat load of evaporative cooling is related to the wet-bulb temperature; the higher the wet-bulb temperature, the lower the heat removal capacity.
Our company plans to use 5 screw-type refrigeration compressors, each equipped with an evaporative condenser. The rated power of the chiller is 680 kW, and its cooling capacity is 2,000,000 kcal/h. How can the maximum heat rejection capacity of each evaporative condenser be calculated? The cooling capacity is 2 million Btu, which is equivalent to 2,000,000*4.18/3600 = 2322.22 KW. The power of the chiller is 680 KW. According to the energy balance, the heat removed by the evaporator-condenser in the cooling system is equal to the power of the screw compressor plus the power of the ammonia evaporator (Is the refrigerant used here ammonia?) ) heat load. Thus, the total heat discharge of the evaporation condenser is equal to 2322.22 + 680 = 3002 KW.