The Importance Of Thermal Comfort

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Abstract The purpose of this paper is to study how thermal comfort is achieved by the various passive design strategies adopted by Belum Rainforest Resort. Thermal comfort is affected by climate and there are several factors that need to be considered at the designing stage of a certain building. As the site is located in a hot and humid equatorial climate, appropriate building design, suitable building materials and shading devices need to be explored in order to determine how thermal comfort can be achieved. To assist and legitimise the research process, literature reviews from various reliable sources related to passive design and thermal comfort were conducted. In order to execute a deeper and thorough study, it is vital to elaborate on…show more content…
There are two types of factors affecting the thermal comfort; environmental and personal factors.

The environmental factors include the air temperature of the environment, radiant temperature of surrounding surfaces, air velocity and relative humidity. Air temperature is the temperature of the air that a person is in contact with. It is usually given in degrees Celsius ºC or degrees Fahrenheit ºF. Air temperature is measured by the Dry Bulb Temperature (DBT). Generally, an increase in temperature will increase the thermal discomfort, but it is worth noting that, although air temperature is an important indicator, air temperature alone is neither an accurate nor valid indicator of thermal comfort.

The second factor affecting thermal comfort is radiant temperature. Radiant temperature is the temperature of a person’s surrounding which includes surfaces, heat-generating equipment, the sun and the sky. This is expressed as Mean Radiant Temperature
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This will cause the skin to have a high surface temperature. As a result, there will be a high rate of heat transfer. If this is insufficient, perspiration will take place. When the perspiration evaporates, heat is lost to the environment and cools the body. Evaporation of perspiration depends on the pressure gradient that exists between the skin surface temperature and the temperature of the surrounding air. For this reason, humidity of air has an impact on thermal comfort. ISO 7730 states that 30-70% of indoor humidity in which an acceptable comfort is

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