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[EnergyPlus_Support] Re: Energyplus IDF for hybid ground source heat pump

The system is located near Nanjing, China.  Usually, the GSHP in this area cannot achieve heating and cooling balance.  If we design GSHE based on the larger cooling load in summer, it will result in excessive GSHE in winter, meaning large initial cost (more bore holes, longer pipes, etc.).

A common way is to combine a second loop into the system, using a cooling tower to provide needed cooling capacity in summer.  The warm water coming out of condenser is split into the GSHE and the cooling tower.  This is the basic idea.  

We just don't know how to model this in EnergyPlus.  

Thank you!

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, YuanLu Li <yli006@...> wrote:
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> I cannot visualize what you are doing. GSHP uses a GS Heat exchanger to cool the condenser coil of the HP. The tower method is the usual way to cool a chiller, which can be a HP.. If you wanted to run the tower and the GSHE at the same time, there must be a reason.   If the GS heat exchanger does not have enough capacity, you wanted to connect the GSHE cooling water to the towerl.  Is that the problem? GSHE is a closed loop water system.  Cooling tower method let the condenser coil  evaporate some water with a fan or funnel to carry away the water vapour. How is your hybrid system designed?  Dr. Li   
>  To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> From: xing.shi.2006@...
> Date: Wed, 3 Aug 2011 07:35:12 +0000
> Subject: [EnergyPlus_Support] Energyplus IDF for hybid ground source heat pump
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>       I am working on using EnergyPlus to simulate a hybrid ground source heat pump (with a cooling tower).  We ran into some difficulties.  Just wondering where we can find an example IDF we can learn from.  EnergyPlus official website offers a web-based example IDF generator but we couldn't find hybrid ground source heat pump there.
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