apply some important passive techniques including insulating materials, airtightness and air ventilation ... for passive house which means reducing by. (29 L/m.
Mediterranean Green Buildings & Renewable Energy Forum (MGF-4) Italy ,31 July to 2 August 2017
Enhancing Indoor Air Quality for Residential Building in Hot Arid Regions Ghanim Kadhem Abdul Sadaa Tawfeeq Wasmi M. Salihb a
Mechanical Engineering Dept. / Al Mustansiriyah University, Iraq Materials Engineering Dept. / Al Mustansiriyah University, Iraq
b
ABSTRACT Indoor air quality (IAQ) in the building depends mainly upon the level of temperature and humidity, where it is an indication of the comfort and health of occupants. The enhancement of indoor air needs to take care of both internal and external conditions. The internal conditions required to control the variation of room temperature and humidity as well as the discomfort sources like: kitchen, laundry and bathroom. The external conditions required to reduce the climatic effects upon buildings. In this study, a test model has built in order to apply some important passive techniques including insulating materials, airtightness and air ventilation system. The experimental work includes the improving of indoor air quality by: source control, suitable filtration and the use of ventilation system. The results in summer show that the indoor temperature could be reduced to 31 oC instead of 42 oC for conventional house. In Iraq, due to low ambient humidity in summer, about (15%-40%), there is no need to the dehumidification process. However, measurements show stability in the fluctuations of relative humidity in the passive model compared to that measured in the traditional one, where the indoor relative humidity was maintained less than 37%. Furthermore, a local simulation program is used to calculate the energy consumption and the greenhouse gas effect. The results show that energy consumption could be saved up to 80%. The fuel consumption that is used in the power plant to produce electricity for cooling could be saved from (32 L/m2) for traditional house to (3 L/m2) for passive house which means reducing by (29 L/m2). The corresponding CO2 emission is saved from (85 kg/m2) for traditional house to (11 kg/m2) for passive house thus reducing by (74 kg/m2) or (87 %). Keywords: indoor air quality, passive system, temperature, humidity, cooling 1
INTRODUCTION
Indoor Air Quality (IAQ) refers to the air quality within the buildings and structures, especially as it relates to the health and comfort of building occupants. Understanding and controlling common pollutants indoors can help reduce the risk of indoor health concerns. The improving of indoor air quality could be done by controlling both air inside the building and air outside. Indoor air quality (IAQ) focuses on airborne contaminants, as well as other parameters like: odor, health and safety. The controlling of the air inside the building
