PPD

Field studies have been carried out in selected Prayer Halls to address the research questions namely the impact of air conditioning on comfort of women versus men as well as on general members versus older members of a congregation, who follow universally adopted standard proceedings, and hold prayer meetings every morning from 3.30 am to 5.30 am and every evening from around 7 pm to 9 pm.  Comfort evaluations were carried out in three cities - two of which are presented here.

The present study investigates the indoor thermal comfort perceived by students through a questionnaire survey conducted during spring 2013 in naturally ventilated primary schools in Athens. Thermal environment parameters such as air temperature, relative humidity, air velocity and mean radiant temperature were simultaneously measured. Then, Fanger’s indices of Predicted Mean Vote (PMV) and Percentage of People Dissatisfied (PPD) were calculated by using clothing and metabolic rates.

The scope of the research described in this paper is to develop, evaluate and propose a new empirical index, the so-called Index of Workplace Comfort (IWC), which quantifies the overall comfort sensation of a user in an office building. The proposed Index of Workplace Comfort is calculated on the basis of both environmental and psychological properly weighted sensation votes of workplace occupants.

This study has explored the possibility and potential of using a thermal active mass system for reducingthe temperature rise and increasing the thermal comfort in an office room. The Controlled Active Mass(CAM) will be used as a heat sink to absorb heat from the room in order to increase the thermal comfort.Physically, the CAM system was designed as a cubic-shaped tank filled with water, with the tanksurfaces either polished or black.

This paper proposes a new ductless air supply system with a ceiling plenum chamber using low temperature air as a secondary HY AC system for an ice thermal storage system. The proposed air supply system mixes low temperature air with return air from a room using a mixing fan unit (MFU), pressurizes a plenum chamber with the mixed air and supplies the air to the occupied room from diffusers on the ceiling.