In a situalation you described, I usually change the equipment availability schedule and leave all the equipment as is.
For example, if you set the 'heater on' temperature below the night temperature, it will not come on. I assume that the water usage can also be shut off during the day.
Do the changes one at a time and study the result.
You also need to make sure that the DesignDay temperature will give you the cold period between 9 am and 6 am.
I have not looked at the actual example file, you may have problem turning off the circulation between the plate and the tank during the day. However, this problem will still be there, even if you remove the heater completely.
Your condition seems to be that when the outdoor temperature is higher then the 16°C the circulation is cut off. The original condition is for the sun to heat the panel to above a certian temperature and then circulate. This is the part I think is causing the problem.
If you are thinking of using this system to collect free cold water, it may work using the ground temperature which does not change very much, and can be left connected the whole day, with the flat panel buried below ground.
Regards,
Dr. Li
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
From: ian8512@xxxxxxxxxxxx
Date: Fri, 28 Nov 2008 10:55:34 +0000
Subject: [EnergyPlus_Support] solar collector to sky radiator
I am going to stimulate a sky radiator using an existing example in
energy plus - solar collector.
In the solar collector, there are 4 components, they are the flat
plate, storage tank, heater and water use connections objects.
I am trying to change it to 2 components, falte plate and a storage
tank. And the operation time will be at night(21:00 to 6:00)
and the set point temperature of the storage tank will be around 20
deg. celeus to 16 deg. celeus.
However, everytime, there are so many errors after I attempted to
change those parameter and setting.
Could somebody lend a helping hand??
energy plus - solar collector.
In the solar collector, there are 4 components, they are the flat
plate, storage tank, heater and water use connections objects.
I am trying to change it to 2 components, falte plate and a storage
tank. And the operation time will be at night(21:00 to 6:00)
and the set point temperature of the storage tank will be around 20
deg. celeus to 16 deg. celeus.
However, everytime, there are so many errors after I attempted to
change those parameter and setting.
Could somebody lend a helping hand??
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