[TRNSYS-users] Parameters for Type557a

[Francois Badinier]

Hi there

 

Yes it is standard practise to input the weighted average thermal properties
when you have different layers.

 

Regards,

 

François Badinier

Development Engineer

ICAX Ltd

1 Berry Street 

London EC1M 5PS

 <mailto:francois.badinier at icax.co.uk> francois.badinier at icax.co.uk

 <http://www.icax.co.uk/> www.icax.co.uk

 

 

 

 

-----Original Message-----
From: a8304506 at graduate.hku.hk [mailto:a8304506 at graduate.hku.hk] 
Sent: 10 December 2010 11:53
To: Trnsys discussion group
Subject: [TRNSYS-users] Parameters for Type557a

 

Hello, everyone.

 

I try to use Type557a to simulate the performance of borehole ground heat
exchangers in a multi-layer ground.  However, I don't know what values I
should use for the store thermal conductivity and volumetric heat capacity
(Parameters

9 & 10).  Should I input the average values of all the ground layers?  It
seems that these two parameters influence the outlet fluid temperature
substantially.

Please advise.  Thank you!

 

Best Regards

LEE, Chun Kwong

 

 

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