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<p>Ahlem,</p>
<p> The value that Type5 is looking for is sometimes referred to as
the heat exchanger UA. You can look in a heat transfer text book
or online for the methods used to compute it. Keep in mind that UA
has units of kJ/h.K. The actual amount of heat transferred by the
exchanger varies with inlet temperature but the heat transfer <i>coefficient
</i>does not.<br>
</p>
<p>kind regards,</p>
<p> David</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 03/12/2019 14:58, berkane ahlem via
TRNSYS-users wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CACC+vA4T9fN4HWdHHyEn+2UoH_gjTRYn6sFmexM1V66to1iuDQ@mail.gmail.com">
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<div dir="auto"><span
style="font-family:monospace;font-size:medium">Hello sirs,</span></div>
<div dir="auto"><span
style="font-family:monospace;font-size:medium">How can i
calculate the "Overall heat transfer coefficient of
exchanger" of type 5b, when the inlet temperature of hot
and cold side are varied with </span><span
style="font-family:monospace;font-size:medium">time .</span></div>
<div dir="auto"><span style="font-family:monospace;font-size:medium;white-space:pre-wrap">best regards,</span></div>
</div>
</div>
<br>
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Principal
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