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How would I calculate the temperature of the water coming out of the system?

The thermal output of the system is 67.5kWp with a maximum flow rate of 65L/h. Approximately 500m of 3/4" pipes.

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- Thread starter spoonjabba
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How would I calculate the temperature of the water coming out of the system?

The thermal output of the system is 67.5kWp with a maximum flow rate of 65L/h. Approximately 500m of 3/4" pipes.

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Andrew Mason

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AM

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Khashishi

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What is a kWp? Is that a typo?

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Andrew Mason

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Not a typo. It is a term used for solar panels to denote the power output under optimal conditions with maximum solar radiation.What is a kWp? Is that a typo?

AM

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Andrew Mason

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##\dot{Q}t = mc(T-T_i)## where ##T_i## = 20C. Work out from the pipe volume the volume of the fluid in the pipe. Then divide by the flow rate to determine the length of time (t) that the fluid will be absorbing heat flow at the stated rate. According to my calculations, fluid will be in the pipe for a bit more than 2 hours. During that time, figure out how much heat a unit of fluid absorbs. From that you can work out the temperature difference.

AM

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Andrew Mason

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I can't really comment much unles you show your calculation and provide the values for m and c.

But just looking at your values there is something wrong here. Maximum solar insolation is 1.3 kw per m^{2} and the area of 500 m. of pipe would be just under 10m^{2}, so it can't be putting out 65.7 kw. Maximuum would be 13 kw.

AM

But just looking at your values there is something wrong here. Maximum solar insolation is 1.3 kw per m

AM

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