[Bldg-sim] SAP Responsiveness

[Ralph Evins]

The responsiveness value appears as 'R' in the space heating
calculation.

Specifically it is in the equation for Tsc (internal temperature without
heating) in Table 9b page 143 (of SAP 2009).

An unresponsive system (low R value) results in higher average
temperatures and thus greater heating load.

An R value of 1 instead of 0.5 can reduce the space heating load by 10%.

 

Ralph Evins

Research Engineer
Computational Simulation and Analysis | Sustainability and Alternative
Technologies
Buro Happold Ltd   |   17 Newman Street   |   London   |   W1T 1PD   |
United Kingdom
Tel: +44 (0) 20 7927 9700  Ext: 5309   |   Fax: +44 (0) 20 7927 9701
www.burohappold.com <blocked::http://www.burohappold.com>  

________________________________

From: bldg-sim-bounces at lists.onebuilding.org
[mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of leen
peeters
Sent: 16 December 2010 23:16
To: bldg-sim at lists.onebuilding.org
Subject: [Bldg-sim] SAP Responsiveness

 

Dear,

 

in the SAP document The Government's standard assessment procedure for
energy rating of dwellings on page 127-130 and page 133 tables list
Responsiveness with values ranging from 0 to 1.

It seems logical to use the responsiveness in the calculation time of
auxiliary energy, however I do not find any reference to this
Responsiveness  in the remainder of the document.

 

Can anyone tell me what the use/influence of this value is throughout
the SAP procedure?

 

Thanks a lot,

 

Leen Peeters

 

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