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Solar Pool Heater
Output Temp Vs. Water Flow |
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Heat transfer in the attic solar pool heater can be readily observed by measuring the difference between the entering air temperature at the coil or fin side of the attic solar pool heater and the exiting air temperature at the fan side of the solar pool heater. When tranferring heat, it is normal to see a 15-30 degree temperature drop across the attic solar pool heater airstream. Ergo (Input air temp - Output air temp = ~ 15-30 degrees F).
Heat transfer can also be observed on the solar pool heater by measuring the difference between the output water temperature and the input water temperature. The above graph is an engineering plot of the water side temperature increase of the attic solar pool heater. Normal temperature rise (LWT - leaving water temperature) of the attic solar pool heater is a gain of 2.0-6.7 degrees F when the water flow rate is between 15-55 GPM. Slowing down water flow will increase output temperature, but will not increase overall heat transfer in terms of BTUS/HR. See Heat Transfer Btus. Additional heat transfer curves are in the first generation attic solar pool heater technical manual no longer produced. Engineering Data |
