RE: [EnergyPlus_Support] Controlling Heating Discharge Temperature

To: "EnergyPlus_Support@xxxxxxxxxxxxxxx" <EnergyPlus_Support@xxxxxxxxxxxxxxx>

Subject: RE: [EnergyPlus_Support] Controlling Heating Discharge Temperature

From: "Edward G. Lyon" <eglyon@xxxxxxx>

Date: Mon, 23 Aug 2010 17:03:37 -0400

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Thread-topic: [EnergyPlus_Support] Controlling Heating Discharge Temperature

Ok, so what I have to do is calculate my own load and apply that as a “Sensible Load Request” to a “Unitary HVAC” object. This reduces heating and lowers the supply air temperature so I can simulate the defective operation of the field equipment I am looking at. The question now is does this “Sensible Load Request” include or exclude the efficiency of the equipment?

Ned Lyon, P.E. (MA)
Staff Consultant

SIMPSON GUMPERTZ & HEGER
781.907.9000 main
781.907.9350 direct
781.907.9009 fax
www.sgh.com

From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Don Shirey
Sent: Monday, August 23, 2010 2:51 PM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: Re: [EnergyPlus_Support] Controlling Heating Discharge Temperature

This object is controlled by the thermostat setpoint and the calculated cooling/heating load for the control zone .... a setpoint manager is not used to control its operation.

Edward G. Lyon wrote:

I’m trying to control the heating discharge temperature of a Unitary:Furnace:HeatOnly. I’m having a hard time identifying the right node to control. I assume that it should be the Air Loop Outlet Node, but that does not seem to be working. Could it be the Zone Equipment Inlet Node?

Ned Lyon, P.E. (MA)
Staff Consultant

SIMPSON GUMPERTZ & HEGER
| Engineering of Structures and Building Enclosures

41 Seyon Street, Bldg. 1, Suite 500
Waltham, MA 02453

781.907.9000 main
781.907.9350 direct
781.907.9009 fax
www.sgh.com

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