<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto">What version of TRNSYS are you using? I believe there was a bug fix a while back that addressed this issue - but that’s from memory. And what do you mean by the time to heat up the rock bed; the entire average temperature of the rock bed or the temperature near the top of the rock bed? Increasing the number of segments shouldn’t change the average temperature a lot but will change the stratification in the storage.<div><br></div><div>Jeff <br><br><div dir="ltr">Sent from my iPhone</div><div dir="ltr"><br><blockquote type="cite">On Mar 28, 2023, at 2:24 PM, Alex Cheng via TRNSYS-users <trnsys-users@lists.onebuilding.org> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr"><div dir="ltr"><div class="gmail_default" style="font-family:trebuchet ms,sans-serif">Hello, </div><div class="gmail_default" style="font-family:trebuchet ms,sans-serif"><br></div><div class="gmail_default" style="font-family:trebuchet ms,sans-serif">In Type 10 rock bed storage, why is it that when the number of derivatives/segments is increased, the time it takes to heat up the rock bed is faster? The difference between the segment = 5 and the segment = 40 is drastically different for small rock beds. </div><div class="gmail_default" style="font-family:trebuchet ms,sans-serif"><br></div><div class="gmail_default" style="font-family:trebuchet ms,sans-serif">Thanks</div></div>
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