RE: [EnergyPlus_Support] heating and cooling deadband (4 setpoints)

1ZoneEvapCooler.idf is one of the example files in the Ver.7.0 release that uses the availability manager to switch in and out the moisture pad, between 27°C and 22°C. You may have a look at that example.

The other example I can think of is the solar collector panel which was also controlled that way to charge the storage tank. The charging hot water would not flow until the temperature has reached a minimum value set using the manager, to turn on a water circulating pump. The pump is also controlled by a setpoint manager for the tank.

Type 1 and type 2 thermostat has a set back temperature. I think it is 0.2°C. This number may be adjustable. You need to ask the EPlus Help Desk for a definite answer. I do not have the EPlus source code to find the exact way of control operation.

The dual band thermostat control do nt seems to have a set back value, because the heat balance is calculated by moving the zone air mass in and out at different temperature. The mean zone air temperature remain constant most of the time. The capacity of the Dx coil is controlled by on/off of the compressor.

Dr. Li

P.S. I am surprised to see Centre for Sustainable Energy Technologies (CSET), The University of Nottingham Ningbo, in Nigpo. Is it a branch of the University of Norttingham in UK? I was born in Ningpo. My BSc[EE], 1958, was from Imperial College, London, England.

I think for building comfort, sustainable energy usage should also be limited. Ningpo does not need cooling much in Summer, and the Winter is relatively mild. Good building insulation and a little of heating is all you need. Of course, the high rise buildings are not designed for low energy usage and they are growing very fast in Ningpo.

> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> From: georgios.kokogiannakis@xxxxxxxxxxxxxxxxx
> Date: Sat, 10 Dec 2011 17:14:17 +0800
> Subject: RE: [EnergyPlus_Support] heating and cooling deadband (4 setpoints)
>
> Many thanks for your reply Dr Li.
> I thought this was something simple and straightforward.
>
> I am not familiar with the availability manager but I am trying to check it out from the documentation.
> I think it is not possible to do it as a seasonal study with type 1 and type 2.
>
> I will try to see the other options/systems, otherwise I will end up using the not so realistic fixed setpoint control.
>
> Regards,
> Georgios
> ________________________________________
> From: EnergyPlus_Support@xxxxxxxxxxxxxxx [EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of YuanLu Li [yli006@xxxxxxxxxxx]
> Sent: Friday, December 09, 2011 9:38 AM
> To: EnergyPlus_Support
> Subject: RE: [EnergyPlus_Support] heating and cooling deadband (4 setpoints)
>
> You may try using the availability manager to control the purchased heat and cool at those temperatures.
>
> I am not sure whether you can control the set back temperature range directly using the type 1 and type 2 thermostat with seasonal control.
>
> Some equipment objects using Delta temperature range can be programmed to match your values.
>
>
>
> Dr. Li
>
>
> ________________________________
> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> From: georgios.kokogiannakis@xxxxxxxxxxxxxxxxx
> Date: Fri, 9 Dec 2011 07:35:35 +0800
> Subject: [EnergyPlus_Support] heating and cooling deadband (4 setpoints)
>
>
>
> Dear all,
>
>
>
> I would like to set up the following control in my model:
>
> Heating ON at 15 oC and OFF at 19 oC
>
> Cooling ON at 27 oC and OFF at 24 oC.
>
>
>
> I did assume that Dual Setpoint with deadband would be what I wanted but it seems that, if I understand it correctly, this is just a combined single heating and cooling setpoint.
>
>
>
> Is there a way to achieve this with Eplus? My plant system will just be an IdealLoadAirSystem.
>
>
>
> Thanks and regards,
>
>
>
> ----------------
>
> Dr Georgios Kokogiannakis
>
> Lecturer, Center for Sustainable Energy Technologies (CSET)
>
> The University of Nottingham Ningbo, China
>
>
>
> Tel: +86 574 8818 0929
>
> Office number: Science and Engineering Building 436
>
> www.nottingham.edu.cn/cset
>
>
>
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