Re: [EnergyPlus_Support] Variable flow chilled ceiling input water temperature too high

[Tooran T <t.t111ir@xxxxxxxxx>]

Hi wyatt ,

i m user of Design builder too , but i have some problem , i don't know when i set the thermostat heating setpoint temperature for example at 20 'C what is it mean ? and what is the real air temperature of the zone? the output result that shows operative temperature and air temperature and rafiant temperature  are not the real air temperature of the room

could you please help me?

thanks

From: wyatt.kennedy21 <wyatt.kennedy21@xxxxxxxxx>
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Sent: Wednesday, January 11, 2012 4:52 AM
Subject: [EnergyPlus_Support] Variable flow chilled ceiling input water temperature too high

 

I have created a variable flow chilled ceiling system for an office building. I used Design Builder to build the initial model. I have a setpoint manager on the chilled water supply that should control the temperature to 15 C. I am having a problem where the input temperature for the chilled ceiling is too high. Please refer to my uploaded screenshots: http://tech.groups.yahoo.com/group/EnergyPlus_Support/files/Variable%20Flow%20Chilled%20Ceiling%20/ . I have made sure to check that my internal loads are correct are too high. The "chilled water" input temperature into the chilled ceiling gets as high as 35 C. I have a few ideas as to what the problem may be involving:

• If you have a variable flow chilled ceiling, does the attached chilled water loop have to be a variable flow loop or is there a way to have constant flow loop with bypass?
• The chiller output temperature is matching the the input temperature to the chilled ceiling so it may have something to do with the chiller

I didnt have this problem when the chilled ceiling was constant flow (the input temperature was always 15 C and so was the output temp of the chiller), so it has something to do with changing the chilled ceiling to variable flow. Any comments or suggestions would be greatly appreciated!

 

Thank you,

Wyatt

__._,_.___

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.

Your email settings: Individual Email|Traditional
Change settings via the Web (Yahoo! ID required)
Change settings via email: Switch delivery to Daily Digest | Switch to Fully Featured
Visit Your Group | Yahoo! Groups Terms of Use | Unsubscribe

__,_._,___