AIVC

To quantify the energy impact of air change on total energy use, the AIVC has been conducting a study of current estimates for non-industrial buildings in thirteen major industrialised countries. This document explains how air infiltration and ventilation together account for a significant proportion of energy use in buildings. Air change energy use and its effect on carbon dioxide emissions due to use of fossil fuels are considered. The potential for reduced energy use by improved ventilation control is also reviewed.

As an introductory note, this aims to place the need for cooling for thermal comfort into the context of overall energy efficient building design. Additionally, it stresses the role of ventilation in meeting cooling requirements. Chapters are included on ventilation and cooling requirements; factors affecting cooling load; ventilation and cooling systems; and energy issues in ventilation and cooling, covering space cooling load, plant load and fan energy.

The objectives of this work are: first to determine the theoretical energy requirements per constant mien unit of outdoor air used for ventilation for a number of different climates and locations in North America and Europe; and secondly to determine the variation of this annual ventilation heating and cooling energy requirements due to the set points for temperature and humidity. The energy impact and/or trade-offs involved between bringing in outdoor air for indoor air pollution reduction and the energy required to condition this sir are investigated in this report.

Provides a platform for the dissemination of information related to infiltration, ventilation, indoor air quality and energy use within buildings by means of a survey and analysis of current research. The current survey reports on research projects from over 250 sources worldwide. The sections include an analysis of the results of the survey, a detailed list of survey replies, which is also available in searchable database format, and contact names and addresses for researchers.

Discusses the issues which influence the performance of heat recovery devices within typical building applications. It is intended to cover the three main types if devices installed in ventilation systems in residential and commercial buildings, which are run-around coils, plate heat exchangers and thermal wheels (rotary regenerators). Other systems such as heat pipes are also described briefly.

Organisations in many countries have contributed data to the AIVC to establish a unique collection of numerical data suitable for design purposes and model evaluation. By combining information from these multiple sources, it is possible to consider a far wider range of operating conditions than would be possible by using the results from a single set of measurements alone. The analysis presented in the report is in three sections covering component leakage data, whole building leakage data and wind pressure evaluation.

The purpose of this comparison of specified airtightness and ventilation rates is to provide a reference document for all those involved in ventilation and building research. It summarises available airtightness and minimum ventilation rate requirements in the AIVC's Member Countries. It also examines a number of indoor air quality standards. Certain analyses have also been included, whenever uniformity of standards permits.

The aim of this study is to examine common ventilation and air conditioning systems and strategies for both domestic and commercial buildings in the member countries of the AIVC. To help identify common systems, a literature search was conducted and the system descriptions of two professional institutions and one commercial supplier were examined. This led to the establishment of a common classification of ventilation and air conditioning systems.

The infiltration data set covers December 1990 to October 1991 from Reference Unit #5 at the Alberta Home Heating Research Facility (AHHRF) with a total of 6063 hours of data. The facility is made up of six permanent test houses, five of which are built to residential wood frame construction standards with a sixth house of masonry construction. The six unoccupied test houses have been continuously monitored since 1980 for building envelope energy losses and ventilation rates.

A fundamental objective of this report is to investigate the techniques used in the design and research fields for the evaluation of thermal and airflow simulations. The scope is restricted to the whole building rather than flow and heat transfer within individual structural elements (e.g. cavity walls). Considerable developments are taking place in the field of air flow and thermal simulation. Rather than present an in-depth study of these developments, this report concentrates on the rather more general aspects of the combined simulation.