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Re: [EnergyPlus_Support] Question on Zone Control.
You are correct that the dual setpoint themostat control type is used to allow
automatic switching between heating and cooling. The single heating and single
cooling setpoint options can be useful in cases where equipment is switched
seasonally between heating and cooling, or when only one mode is available
during certain times of day (for example, heating-only during unoccupied hours).
On 28 Jul 2005, at 22:41, Shantanu P wrote:
> I have a question about the Zone Control Thermostatic object. I read the I/O
> reference and understood that we can set the thermostatic control to each hour
> based on the control type. There are two questions: -I assume that the type of
> the thermostat itself will determine the control type right, i.e. if we have a
> Single cooling set point thermostat then obviously its control type is 2. Now
> assuming that we have two different thermostats in a zone, then how do we
> determine what should be the control type if we dont know the loads. Would,nt it
> be a chicken or egg problem, when you are requiring energyPlus to calculate the
> loads and these loads in turn are required to determine the thermostat control
> in the input file? -I am just wondering how are the controls Single
> Cooling/heating setpoint is going to help modeling. We do not know what the
> loads for the building are going to be, so if we set the control to either one
> of them and the load is opposite, then there would be no cooling/heating
> provided. Is it not reasonable to say that only Dual Set point control can be
> used to model a building to have the room temperatures are maintained?
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Michael J. Witte, GARD Analytics, Inc.
EnergyPlus Testing and Support
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