Heat circle -- Calculating the air flow needed across a condenser

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SUMMARY

The discussion centers on calculating the necessary airflow across a condenser to effectively dissipate heat, with a specified temperature difference (dT) of 10-15°C and a coefficient of performance (COP) of approximately 3. The user inquired about using a fan with an airflow of 0.67 m³/sec, but it was determined that this airflow is insufficient compared to the requirements of the system. It was emphasized that condenser fans typically need to provide airflow that is at least double that of evaporator fans, necessitating a review of the manufacturer's data for accurate sizing.

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yagel2801
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Hi!
I need to calculate what air flow needs to flow across the condenser so that the heat emitted from the condenser is directed to the air.
dT=10÷15 [C]
COP =~3
According to the manufacturer's data the fan airflow is 0.67 [m^3/sec] and i need to check if i can use it.
thanks
 
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Welcome to PF.
Please provide us with a link to the manufacturer's data sheet, for the product you are using.
 
thank you.
https://www.mouser.co.il/ProductDetail/670-OA825EC-UR-1WBXC
 
yagel2801 said:
thank you.
https://www.mouser.co.il/ProductDetail/670-OA825EC-UR-1WBXC
That's a fan. It doesn't seem to have anything to do with the system/problem described in the first post (it doesn't have the same airflow). Please provide the data sheet for the system in the firs post (an ac unit?) and fully describe the system, application and problem you are trying to solve. We can't read your mind.

[edit] Ehh, maybe I can. Are you trying to size a condenser fan for an air conditioner with evaporator specs as listed in the OP? If so, then no, you can't use a condenser fan that's 35x lower capacity than the evaporator fan. Condenser fans are generally on the order of twice the airflow of evaporator fans. Exactly how much you need...well, again, look at the product data for the air conditioner (and why doesn't it already have a condenser/fan?).
 
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