RE: [EnergyPlus_Support] availabilityManager:High temperaturTurnoff

i m not good at english so mybye i dont undrestand your word exactly .you say : " If the avilability manager is associated with the heater, it turns off the heater." and
" The size and type of the heater is another matter" what you mean by heater ?is that baseboard heater or water heater?"

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The subject under discussion is the boiler. Therefore the heater is the water heater for the boiler. The size and type of the heater is not in the Sizing:Plant object I quoted in the mail below. That is why I said that the size and type of the heater is another matter.

====================
The boiler has a heater at the source side of the tank.

Heater is the gas fire, oil fire, or electric element immersed in the tank.

The tank is the object that holds the water. The theremostat is in the tank, and not on the fire. When the temperature is at the set point, the heater is turned off.
====================
The pump turns off the water flow. The thermostat turns off the heater. The temperature at the output of the pump is the same as that of water at the tank inlet. If there is no water flow, the tank temperature does not change, except by convection and coduction through the tank casing to the surrounding. This is general and not just for EPlus.

Dr. Li

To: EnergyPlus_Support@xxxxxxxxxxxxxxx
From: t.t111ir@xxxxxxxxx
Date: Fri, 27 Jan 2012 16:25:04 +0000
Subject: Re: [EnergyPlus_Support] availabilityManager:High temperaturTurnoff

From: YuanLu Li <yli006@xxxxxxxxxxx>
To: EnergyPlus_Support <energyplus_support@xxxxxxxxxxxxxxx>
Sent: Friday, January 27, 2012 7:31 PM
Subject: RE: [EnergyPlus_Support] availabilityManager:High temperaturTurnoff

thanks Dr.Li ,

thank you very much Dr.Li

!- =============
Sizing:Plant,
Boiler Loop, !- Plant or Condenser Loop Name
HEATING, !- Loop Type
80., !- Design Loop Exit Temperature {C}
15; !- Loop Design Temperature Difference {deltaC}
!- ======================

is all you need to enter in the IDF. The size and type of the heater is another matter.
=============================
In control engineering most controller has a built in hysteresis. However, you may not be able to specify it exactly, if it is not designed to be adjustable.

What you are trying to do is to design your own controller.

Dr. Li

To: energyplus_support@xxxxxxxxxxxxxxx
From: yli006@xxxxxxxxxxx
Date: Fri, 27 Jan 2012 08:21:27 -0500
Subject: RE: [EnergyPlus_Support] availabilityManager:High temperaturTurnoff

If the avilability manager is associated with the heater, it turns off the heater.

If the avilability manager is asspcoated with the tank used side, it turns off the loop supply (pump).

Sensor node need not be in the same loop, but must respond of the change when the control is activated. If the temperature falls below the limit, the control is removed. Back to your thermostat problem. Set-back is not the same as limits.

Dr. Li

To: EnergyPlus_Support@xxxxxxxxxxxxxxx
From: t.t111ir@xxxxxxxxx
Date: Fri, 27 Jan 2012 09:36:16 +0000
Subject: [EnergyPlus_Support] availabilityManager:High temperaturTurnoff

Dear memebers ,
ref : Document :EngineeringRefrence.pdf -983
"High temperature turn off :
The input object availabilityManager:High temperaturTurnoff is used to turn off a central air system or a plant loop if a sensed node temperature exceeds a temperature limit."

i want to know availabilityManager:High temperaturTurnoff , turn off the plant loop or just the turn off the component ?
for example : i set field :Sensor Node name : at the outlet of boiler .. in this plant loop there is pump and boiler as a component.

then availabilityManager:High temperaturTurnoff turn off boiler or plant loop ?if it turn off the plant loop it means it turned off pump too?

thanks

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