[Equest-users] 回复： Thermal storage tank doesn't work below zero degree

[冷面寒枪]

you must Specifies the maximum rateat which the storage component can discharge and discharge 。
 




------------------ 原始邮件 ------------------
发件人: "WangWendy"; 
发送时间: 2013年5月31日(星期五) 下午2:55
收件人: "Equest-users at lists.onebuilding.org"; 
主题: [Equest-users] Thermal storage tank doesn't work below zero degree




Hello everyone
 
 
 
This problem came across when I was modelling an ice-storage system. Hourly report said the charge and discharge load are both zero, which means the tank doesn’t work under the setting condition. The supposed entering temperature of the tank is -6℃ and is leaving at -3℃. Freeze temp is below -10℃. In order to run the simulation, I have to raise the charge/discharge temperature as well as the loop temperature of charge loop up above 0℃. When the charge temperature is above or  equal to zero, the tank does work. However it changes the performance of double duty chillers under ice-making mode, since the curve of chiller is different with different leaving temperature, leading to a bigger assigned load of double duty chiller than the max charge load and less accurate results.
 
 
 
Does anyone have any thoughts how to solve this problem? Making storage tank work below 0℃ at setting temperature? Or is this the limit of eQuest software yet to be solved?
 
 
 
Many thanks
 
 
 
Wendy
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20130531/9ad9f814/attachment.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/octet-stream
Size: 7237 bytes
Desc: not available
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20130531/9ad9f814/attachment.obj>