[TRNSYS-users] Type 56 Zone Air Capacitance

[Devin Rohan <drohan@purdue.edu>]

I have a single zone office with a concrete slab and non-massive walls.  I only seem to get good agreement between TRNSYS and a 1D finite difference model I built when I increase the Zone Air capacitance into the thousands (4000-6000 kJ/K).  Other wise, TRNSYS's air temperature varies wildly and unrealistically with the ambient temperature and there's no thermal lag from the concrete.  Is this high of value for the zone air capacitance ok?

-- 
Devin M. Rohan, LEED Green Associate
Purdue University 
Civil/Architectural Engineering
drohan@purdue.edu