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Thread: coil spec : TD or LMTD
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04-09-2012, 07:27 AM #1
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coil spec : TD or LMTD
good day
what is the norm to spec a coil, TD or LMTD?
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04-09-2012, 10:43 AM #2
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Re: coil spec : TD or LMTD
Depends what you are considering, are you building a coil or just applying a pre-engineered coil
Location, United Kingdom
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04-09-2012, 04:08 PM #3
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Re: coil spec : TD or LMTD
specifying performance for pre engineered coil
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12-09-2012, 07:22 PM #4
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Re: coil spec : TD or LMTD
Ok then you can only consider the TD as the LMTD has already been appraised by the engineer who designed the coil.
The coil selection is based on the SHR for the design and in imperial units the TD will be selected in the following range.
SHR 0.95 - 0.80 5 to 8 deg F Below ADP (apparatus dew point)
SHR 0.80 - 0.50 8 to 15 deg F Below ADP
All other factors will be tabulated by the engineer who designed the coil and correction factors for capacity against evaporating temperature will be published with the coil specification.
If this is for A/C applications then consideration of entering dry and wet bulb conditions will also have to be applied to the selection process.Location, United Kingdom
