Abstract
The office is an important part of our daily life, people spend most of their time doing works inside of the office and therefore the quality of the indoor environment is a significant factor affecting the productivity and happiness of office users. Many factors ınfluence the pattern of airflow: indoor air quality, thermal comfort and energy saving in an office room. In this study, the effects of the square diffusers on thermal comfort investigated numerically for an office room. Numerical research was subsequently carried out using the validated CFD model. This model solved the continuity, energy conservation and momentum equations in addition to k–ε model equation for turbulence modelling. Predicted Percentage of Dissatisfied (PPD) is a frequently used tool for assessing human comfort rating. A PPD based control HVAC (Heating, Ventilating and Air Conditioning) system has the potential to provide enhanced thermal comfort inside a location by taking into consideration all main thermal comfort variables. The CFD results revealed that thermal conditions occurred according to ASHRAE standards in the model office room with a square diffuser.
Highlights
The office is an important part of daily life, people spend most of their time working inside of the office and the quality of the indoor air environment is a significant factor affecting the productivity and happiness of office users
An effective design of HVAC system involves the appropriate installation of the exhaust and supply outlet with regard to a room’s geometry configuration, distribution of indoor thermal conditions and indoor heat sources
The ventilation efficiency and energy saving in most air distribution systems are greatly affected by the supply, return and exhaust diffuser location arrangements [1]
Summary
The office is an important part of daily life, people spend most of their time working inside of the office and the quality of the indoor air environment is a significant factor affecting the productivity and happiness of office users. Many factors influence the pattern of airflow: indoor air quality, thermal comfort and energy saving in an office room. A PPD based control HVAC (Heating, Ventilating and Air Conditioning) system has the potential to provide enhanced thermal comfort inside a location by taking into consideration all main thermal comfort variables. The Heating, Ventilating and Air Conditioning (HVAC) system’s most critical goal is to develop a comfortable and healthy environment and reduce indoor pollutant concentration. The ventilation efficiency and energy saving in most air distribution systems are greatly affected by the supply, return and exhaust diffuser location arrangements [1]. Thermal comfort is the definition of the comfort of the people in the occupied zone while continuing their physical or mental activities under physical factors such as temperature, humidity and air circulation. This is commonly defined as the mean radiant temperature (MRT) and any strong unidirectional radiation such as radiation from the sun
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