Skip to content

Search the knowledge portal

  • PublisherCIBSE
  • Product Code
  • Number of pages
  • Publication DateApr 2012
  • ISBN

Passive Design Assistant - A tool to elucidate the principles of passive design

CIBSE MEMBER PRICE

PDF Format

Free

Login

STANDARD PRICE

PDF Format

Free

Login

Passive Design Assistant - A tool to elucidate the principles of passive design

Session 2 Paper 3, CIBSE ASHRAE Technical Symposium, Imperial College, London, UK
18th and 19th April 2012

 

Passive Design Assistant (PDA) is a new, freely available software tool that has been developed to enable simple dynamic thermal calculations to be carried out in a way that is accessible to a broad range of users. The aims of PDA are twofold: first, to elucidate the principles of passive design, e.g. for teaching purposes, and secondly, to enable basic design calculations to be carried out, for instance the assessment of summertime temperatures in naturally ventilated buildings and to determine heating and cooling loads in mechanically serviced buildings.

The model examines the thermal response of a single space to the different elements important in the development of a passive design strategy, such as fenestration, shading, ventilation, thermal mass, profiles of causal gains and climate conditions. The calculation method used in PDA is the standard CIBSE Simple Dynamic Thermal model, which is an analytical method that has been well documented but was previously not available as a stand:alone software tool. Some further enhancements of the CIBSE method have also been implemented in PDA. This paper describes the software and documents the new algorithms developed.