Sorry.
I meant the graphs alone do not have the information on the cause of why the heating and cooling occured together.
I did not down load your graphs, as I have a slow PC internet connection.
If the plant is designed as cooling and heating systems, they should not interfer with each other.
The condenser is on the chiller loop. If the CW coil is not in use, the chiller is not active.
If the boiler is feeding the reheat coil, it can be on at the same time. There are two water loops.
If you have type 4 thermostat control with a large installation, it is very common for a heating zone that need cooling because the internal load is high, and the cooling zone need heating (VAV with re-heat) which is also normal.
So you required very detailed information to separate these different cases and lavel them as problems.
That is why in the other mail I kept saying that do not look at the averaged valuesalone.
Schedule values, daytype index, time of day, and day of year, outdoor temperature, zone mean air temperature, zone heating and cooling rate values in time step are all to be included as the minimum listing in the Output variable request during debug stage.
Dr. Li
P.S. The two cursors on the Hotmail was not placed on the same place, when I deleted some text, it happen in two places. It happens quite often with me when I do the text editing.
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
From: ery.mailinglist@xxxxxxxxx
Date: Mon, 5 Mar 2012 11:35:09 -0700
Subject: Re: [EnergyPlus_Support] simultaneous heating and cooling in the condenser loop
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Primary EnergyPlus support is found at:
http://energyplus.helpserve.com or send a message to energyplus-support@xxxxxxxx
The primary EnergyPlus web site is found at:
http://www.energyplus.gov
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I meant the graphs alone do not have the information on the cause of why the heating and cooling occured together.
I did not down load your graphs, as I have a slow PC internet connection.
If the plant is designed as cooling and heating systems, they should not interfer with each other.
The condenser is on the chiller loop. If the CW coil is not in use, the chiller is not active.
If the boiler is feeding the reheat coil, it can be on at the same time. There are two water loops.
If you have type 4 thermostat control with a large installation, it is very common for a heating zone that need cooling because the internal load is high, and the cooling zone need heating (VAV with re-heat) which is also normal.
So you required very detailed information to separate these different cases and lavel them as problems.
That is why in the other mail I kept saying that do not look at the averaged valuesalone.
Schedule values, daytype index, time of day, and day of year, outdoor temperature, zone mean air temperature, zone heating and cooling rate values in time step are all to be included as the minimum listing in the Output variable request during debug stage.
Dr. Li
P.S. The two cursors on the Hotmail was not placed on the same place, when I deleted some text, it happen in two places. It happens quite often with me when I do the text editing.
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
From: ery.mailinglist@xxxxxxxxx
Date: Mon, 5 Mar 2012 11:35:09 -0700
Subject: Re: [EnergyPlus_Support] simultaneous heating and cooling in the condenser loop
It does, or it does not? If it does, I fail to see it. Would you
care to elaborate?
On 03/05/2012 10:44 AM, YuanLu Li wrote:
On 03/05/2012 10:44 AM, YuanLu Li wrote:
Graphs only show or confirm what you have observed. It does have information on the casue.
Dr. Li
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
From: ery.mailinglist@xxxxxxxxx
Date: Mon, 5 Mar 2012 10:34:16 -0700
Subject: Re: [EnergyPlus_Support] simultaneous heating and cooling in the condenser loop
As a follow up, these graphs show the problem: the cooling tower operates at the same time as the boiler. The plant component temperature graph is very revealing if you compare the deltaT between the boiler and the cooling tower.
Any insight on this is greatly appreciated.
Ery
On 03/05/2012 06:06 AM, Linda Lawrie wrote:Are you reporting at a detailed level so you KNOW there is simultaneous heating and cooling or is it just happening over an hour?
At 04:50 PM 3/4/2012, Ery Djunaedy wrote:
I am referring to the example
HVACTemplate-5ZoneWaterToAirHeatPumpTowerBoiler.idf. The cooling tower
and the boiler configuration from the HVAC template always results in a
simultaneous heating and cooling.
__._,_.___
Primary EnergyPlus support is found at:
http://energyplus.helpserve.com or send a message to energyplus-support@xxxxxxxx
The primary EnergyPlus web site is found at:
http://www.energyplus.gov
The group web site is:
http://groups.yahoo.com/group/EnergyPlus_Support/
Attachments are currently allowed but be mindful that not everyone has a high speed connection. Limit attachments to small files.
EnergyPlus Documentation is searchable. Open EPlusMainMenu.pdf under the Documentation link and press the "search" button.
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