Detailed HVAC - VAV reheat with chilled water

Help and discussion on using the Detailed HVAC option

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ricardo.filho
Posts: 3

Detailed HVAC - VAV reheat with chilled water

Postby ricardo.filho » Sun Mar 04, 2018 3:13 pm

Hello guys
I am trying to build a detailed HVAC system for my model and I followed this tutorials
part I and II

https://www.youtube.com/watch?v=UrI1XHXLJcc&t=2s

on the thermostat scheduled I used the occupancy schedules for each zone I have (offices, conf_rooms, toilets, etc)
then I used a temp difference instead of air supply temp. of 11.11 c like the tutorial

On the activity tab I set my setpoint for cooling to 24 and set back at 28, for heating 22 and 18 respectivitly

however when I ran the simulation I am getting the indoor temp to be way out of this range, sometimes I get 7c only and my Fanger PMV is -3 on average, my task is to reach -.4 / .4

what control should I look at first to solve this?

thanks
maciejd
Posts: 10

Re: Detailed HVAC - VAV reheat with chilled water

Postby maciejd » Mon Mar 05, 2018 11:55 am

Had similar problems - I solved them by increasing heating off-coil design temperature, but I had a system without reheat. Play with design values, it may help.

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