English

This paper details a set of guidelines for the design of thermally efficient houses in the generally temperate climate of Greece, using the common construction materials of Greek contemporary housing and employing simple passive design techniques. The guidelines should be of use to the designers of climate sensitive housing in Greece. The relationship between heat capacity· levels of thermal insulation and size of openings are considered in detail. The Building Bioclimatic Chart devised by Givoni and the Energy Simulation Computer program ESP are the mai tools of the study.

This report on a project carried out at the Building Research Association of New Zealand describes an investigation on the role of draught sealing  measures in houses and is part of a wider programme concerned with overcoming heat and moisture problems in buildings.

In order to arrive at a simple design procedure to handle heat transfer in a room, certain fairly complicated expressions for radiant exchange are needed, and moreover the further operations that have to be performed on them are involved and lead to non-exact relations.

A generalized multi-chamber ventilation model is developed for air contaminant prediction problems where the parameters of the system, such as airflow rates, are described by Gaussian probability distributions. A numerical solution, utilizing stochastic differential equations (SD E's), is provided to facilitate its application. The model is used to calculate contaminant concentration histories described by means and standard deviations. It is also used to show the sensitivity of concentrations to the variation of such parameters as infiltration flows and contaminant source rates.

A comprehensive theory of multi-chamber air infiltration measurement using a single tracer gas is introduced from the general stand point of system identification. The thermal network model can be applied not only to the temperature transfer and diffusion system but also to the tracer gas transfer system. This model is formulated mathematically in a stale equation. The coefficents in the state equation represent airflow rates of infiltration. Two theories for estimating these coefficients are deduced from the least square.