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<p>Hello</p>
<p>I'm using an evacoaed tube solar collector (type 71). the colector efficiency curve, area and test flow rate is based on a test report. The collector pump is controlled by a differential controller to be turned on when th difference of collector inelt and
outlet temperatures is higher than 5 and to be turned off when it is lower than 2. Based on the area multiplied by test flow rate, the flow rate of pump could be 375kgr/hour. But using this flow rate the pump is turned off and turned on repeatedly, using low
flow rate about 100 kgr/hour, the pump works well, but the outlet temperature is really low. </p>
<p>attached picture named 100 is for using 100kgr/hour wter flow rate and the other named 375 is for <span style="font-family: Calibri, Arial, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px;">100kgr/hour
wter flow rate. As the longitudinal IAM data was not in the report, the default IAM data of trnsys is used.</span></p>
<p><span style="font-family: Calibri, Arial, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px;">Please give me your comments to solve it</span></p>
<p><span style="font-family: Calibri, Arial, Helvetica, sans-serif, EmojiFont, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; font-size: 16px;">Thank you</span></p>
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Ahmad abbasianzadeh</div>
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Solar energy Researcher</div>
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<b>Harrisburg, Pensylvania</b></div>
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