Re: [TRNSYS-users] craeting new type 107, absorption chiller data

[David BRADLEY <d.bradley@tess-inc.com>]

Dear Talib,
  The method of adding data to extend the range of the performance file is correct. However, you need to also extend the actual performance data as well. For example, the provided data file shows a normalized capacity of 1.0469 and a fraction of design energy input of 0.98 for the following inlet conditions:

Fraction of Design Load: 1.0
Chilled Water Setpoint: 10.0 C         
Entering Cooling Water Temperature: 32.2 C  
Inlet Hot Water Temperature: 116.11 C

simply changing the inlet hot water temperature range so that the top value is 95C would result in the same performance (normalized capacity of 1.0469 and a fraction of design energy input of 0.98) for a different set of inlet conditions. More likely, the performance of the chiller would be quite different at such a low inlet hot water temperature. Some chillers may simply not be able to operate at lower inlet hot water temperatures.
Best,
 David

 

On 11/14/2012 07:16, Talib Ahmadu wrote:

Dear all,

I am using trnsys 16 to model a cooling system. The absorption chiller i intend to model has its generator temperature outside the range of the default temperature of type 107 data. What i have done was to edit the inlet hot water temperature column of performance data of type 107 from (108.89C to 116.11C) to another range (75C to 95C), to conform with the chiller i intend to model. Please i want to know if this is correct.

Thanks.

T. Ahmadu

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