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

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Discussion Overview

The discussion revolves around calculating the necessary airflow across a condenser to effectively direct heat emitted from it into the air. It involves technical specifications related to air conditioning systems, specifically focusing on the relationship between fan airflow and condenser performance.

Discussion Character

  • Technical explanation, Debate/contested

Main Points Raised

  • One participant seeks to determine if a fan with a specified airflow of 0.67 [m^3/sec] is adequate for their condenser based on given temperature differentials and coefficient of performance (COP).
  • Another participant requests the manufacturer's data sheet for the product in question to better understand the system and its requirements.
  • A subsequent reply critiques the provided fan data, suggesting it does not match the requirements of the system described and questions the relevance of the fan's specifications.
  • It is proposed that condenser fans typically require airflow capacities approximately twice that of evaporator fans, indicating a potential mismatch in the original inquiry.
  • Participants express the need for more detailed information about the air conditioning system to provide accurate guidance.

Areas of Agreement / Disagreement

Participants do not reach a consensus, as there are competing views regarding the adequacy of the specified fan airflow and the relevance of the provided data. The discussion remains unresolved, with ongoing requests for clarification and additional information.

Contextual Notes

Limitations include a lack of detailed specifications for the air conditioning system and assumptions about the relationship between evaporator and condenser fan airflow that have not been fully substantiated.

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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