solar heating system
Solar water heating system questions…?
i have made an experiment on a solar water heating and calculated at different time intervals (each 2 mins) the following data:
- tank temperature
- panels temperature
- heat exchanger temperatures (in & out)
i need to calculate the following:
1- efficiency of the panels
2- efficiency of the Heat exchangers
3- the overall efficiency of the system..
how can i do that????
Efficiency of the panels:
This has to be temperature related since you have no other data. A 100% efficient system would transfer all the heat from the panels to the water so for 100% efficient Twater/Tpanels would be 1. Of course you need to use the steady state temperature of the panels and the water…steady state is when the temp doesnt change any more.
Efficiency of the heat exchanger: Same principal as the panels use Temp of the water you heated / temperature of the water that is doing the heating. In the real world you would probably have a flow rate of the water and could calculate the actual heat values but temperature difference appears to be what this homework is all about.
Overall system efficiency is T panel / T water that was heated by the heat exchanger.
Solar Water Heating System for Adding onto Existing Gas ….
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