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for evacuated solar collector, the flow rate at design conditions is 3kgr/hr.m2 as default. using 6m2 as collector area , If I use 18kgr/hour flow rate , the outlet temperature
is acceptable. But this is really low flow rate and I wonder that the collector test flow rate is too low. I need 3000 kgr/hr flow rate to be heated by solar energy but using this value for flow rate, I get unacceptable outlet temperature. changing the "flow
rate at test conditions" to a high number like 300 also leads to unacceptable temperatures. what should I do?
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Ahmad abbasianzadeh
Solar energy Researcher
Harrisburg, Pensylvania
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