Temp Control in Operating Room
Temp Control in Operating Room
(OP)
Could any one advise how temperature and humidity is controlled in an operating room with 100% fresh air?A chilled water AHU is being used.
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Temp Control in Operating Room
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RE: Temp Control in Operating Room
Chilled water cooling coil - cool air to 54F
Reheat coil - for humidity control
Chilled water cooling coil - cool air to 49F
Fan - motor heat
Final Filters - hepa type
Doctors want it cold in the room so be ready to drive the temperature down. You may need glycol in the chilled water system to get 40F water temperature. the alternate is to have a DX coil to drive the temp. down.
RE: Temp Control in Operating Room
RE: Temp Control in Operating Room
RE: Temp Control in Operating Room
it is better to use run-round coil around
the main cooling coil, this is two coils,
one in front and one behind the main coil.
water is pumped around the coils transferring
heat from the front of the coil to the rear
thus reheating the air for "free". also
it is possible to reclaim some coolth or
heat from the exhaust again using cooling
coil, to transfer wasted energy.
the final touch up is from heating coil
which can be hot water etc.
the preheat coil is necessary in winter,
depending on design temperature.
there is no need for glycol, a properly
sized coil can take fresh air at wetbulb
of 82degF down to dewpoint of 50degF with
chilled water at 44degF.
rgds
leelock
RE: Temp Control in Operating Room
The first coil will be at least 6-8 rows. It will do the bulk of the work. In the summer the control valve is running wide open. The second coil is for fine tune the leaving air temperature.
Also when a coil starts to leak you have a back-up that can handel most of the load.
Electric heat is my prefered option. Typically hospitals have a boiler, steam and hot water storage so i use what is available.
Wrap around coils do work and i have specified them on other jobs with lots of outside air.