On coil / off coil temperature
hi all i am new to HVAC . i just want to how to find out on / off coil temperature.
for example : Outdoor temp 45 deg and 90 RH
Room temp 24 deg and 50 RH
MY AIRFLOW IS 16250 CMH
SENSIBLE LOAD 54.85 KW
Re: On coil / off coil temperature
Quote:
Originally Posted by
GIRI
hi all i am new to HVAC . i just want to how to find out on / off coil temperature.
for example : Outdoor temp 45 deg and 90 RH
Room temp 24 deg and 50 RH
MY AIRFLOW IS 16250 CMH
SENSIBLE LOAD 54.85 KW
on coil of AHU/FCU= air entering temperature
off coil of AHU/FCU= air leaving temperature
Re: On coil / off coil temperature
Quote:
Originally Posted by
moideen
on coil of AHU/FCU= air entering temperature
off coil of AHU/FCU= air leaving temperature
Thank you moideen,
I just want to know how you will finalise the on coil and off coil temperature. is there any regulation or formula..?
Re: On coil / off coil temperature
.
Rough rule of thumb is 10 degs difference.
Air off is lower than air on and if it is 10 degs lower then
the thing is working.
(this is a rough rule of thumb that is a guide only)
Regards
Rob
.
Re: On coil / off coil temperature
First you would have to determine what type of kit you are looking at.
In your example above, for the indoor coil, the on coil temp would be 24 degrees for a recirculating unit and 45 degrees for a 100% fresh air unit...
The off coil temp should then ideally be around 10 degrees below your room temp i.e. 14 degrees (assuming we are talking cooling and not heating...).
:cool:
Re: On coil / off coil temperature
Quote:
Originally Posted by
The Viking
First you would have to determine what type of kit you are looking at.
In your example above, for the indoor coil, the on coil temp would be 24 degrees for a recirculating unit and 45 degrees for a 100% fresh air unit...
The off coil temp should then ideally be around 10 degrees below your room temp i.e. 14 degrees (assuming we are talking cooling and not heating...).
:cool:
thank you all for your information
Re: On coil / off coil temperature
Fresh AIr Ratio? Supply air flow?