DISTRIBUTIONS OF THERMAL AND AIRFLOW ENVIRONMENT, THEIR EVALUATIONS AND INPUT ENERGY IN ROOM WITH VENTILATION LOADS UNDER CONTROL OF FLOOR HEATING SYSTEMS OR CONVECTIVE HEATING SYSTEMS

Abstract

This study is aiming at evaluating resultant distributions of thermal and airflow environment in a room ventilated with various air supply openings, and comparing input energy required for heating with floor heating systems or with convective heating systems. Experiments were conducted for different PMV levels. The results are summarized as follows: 1) Conditions of the warm jet issuing from convective heating system significantly affect the vertical and horizontal temperature differences, airflow structures, DR and PMV values. 2) Thermal and airflow environment is maintained uniform, and DR values in most places are kept under 15% during heating with floor heating system. 3) Attachment points and diffusion paths of the ventilated air are markedly different depending on the air supply openings. 4) Input energy required for heating with floor heating system is roughly 20% smaller than that of convective heating system if evaluated with secondary energy directly concerned with room heating.