This report presents a simplified computational model for combined air-, moisture and heat transport for one-dimensional cases. The model is based on finite difference technique with explicit forward differences in time. Analytical solutions for the coupling, the conductances, between the computational cells for a given air flow through the construction are used. Moisture is transferred by vapour diffusion and vapour convection. No liquid water transport occurs.
The radiative cooling potential is determined by the ambient temperature, relative humidity, wind velocity, and cloudiness. Previous assessments of the radiative cooling potential in Greece have been based on mean weather data. In chis paper, 12 years of hourly weather data are used to assess the radiative cooling potential in Athens. The performance results for a simple radiator are also presented. The radiative cooling potential for Athens is promising and simple radiators can be used to estimate the cooling potential.
This paper outlines the results and lessons derived from monitoring the Elizabeth Fry Building at the University of East Anglia (UEA) for a period of 18 months in use. The monitoring, carried out as part of the Department of Environment, Transport and the Region's Energy Efficiency Best Practice programme, sought to examine the performance of the building as a whole rather than focusing on one particular element.
Forty subjects, 20 women and 20 men, were exposed to airflows from five different directions: horizontally towards the front, the back, and the left side and vertically upwards and downwards. The subjects were exposed to stepwise increased air velocities ranging from less than 0.10 m/s to 0.40 m/s at three temperature levels 20, 23 and 26°C. The results showed that airflow direction has an impact on perceived discomfort due to draught. At 20°C and 23°C, airflow from below was perceived as most uncomfortable followed by airflows towards the back and front.
Login