Heat transfer coefficients for chilled water cooling coil for AHU
Heat transfer coefficients for chilled water cooling coil for AHU
(OP)
I would like know how to determine the heat transfer coefficients for the chilled water cooling coil for AHU. On hand I have some data such as:
1) the on coil and off coil temp.
2) the latent and sensible heat tranfer of the coil at different RH(%), chilled water flow rate and fan speed
3) the fresh air supply temps
anyone can give advice would be very thankful.
1) the on coil and off coil temp.
2) the latent and sensible heat tranfer of the coil at different RH(%), chilled water flow rate and fan speed
3) the fresh air supply temps
anyone can give advice would be very thankful.





RE: Heat transfer coefficients for chilled water cooling coil for AHU
(WIT = what is that?)
See Perry's handbook and they'll give you the formulas and stuff ... this is a pretty straight forward heat transfer problem. You will be able to calculate the overall heat transfer coefficient of teh cooler. It also has tables of typical overall heat transfer coefficients for different systems.
RE: Heat transfer coefficients for chilled water cooling coil for AHU
Thanks for the advice, AHU = air handling unit.
Is the title of the book "perry's handbook" or it has a proper title?
RE: Heat transfer coefficients for chilled water cooling coil for AHU
RE: Heat transfer coefficients for chilled water cooling coil for AHU
You can use the formula mCp(T1a-T2a) = UA(T1c-T2c), if you are patient enough to measure the heat transfer area of the cooling coil.
Where LHS temperatures are that of entering and leaving air and RHS temperatures are that of chilled media. (I fear the questions LHS?, RHS? albeit abbreviations are being hated by the most of the eng-tips community).
Regards,