Study On The Effect Of Local Cooling On People With Different Types Of Sleeping Posture

Ramankutti, Suriya Priyaan (2020) Study On The Effect Of Local Cooling On People With Different Types Of Sleeping Posture. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

Text (24 Pages) Study On The Effect Of Local Cooling On People With Different Types Of Sleeping Posture.pdf - Submitted Version Download (1MB)

Abstract

Thermal comfort is a sense of mind that appear to be the well-being of human body in the surrounding environment. To ensure human body achieves thermal comfort at all times, it is essential that the heat produced because of human activities in daily life is depleted at a rate to provide equilibrium inside the body. However, the heat intake in a human body cannot be controlled at times which means there can be a sudden temperature rise and excessive sweating in the body. This phenomenon is known as thermal discomfort in the human body. Due to the globalization the world is frequently affected in terms of thermal comfort in the surroundings. There are more possibilities for extreme heat events to occur. In many ways, this heat events cause human body to lose thermal comfort. Hence, the purpose of this report is to study the effect of local cooling people based on the sleeping posture factor in a cold and hot environment. The scope of this research is to obtain major parameters affecting thermal comfort such as temperature and relative humidity at different position of a human body in regards of three sleeping postures namely back, front and side. A test rig section is developed by preparing a data logger which collects the data by using micro-sensors and transmits it to a software. The micro-sensors measure both temperature and relative humidity data at six positions across a human body (head, neck, back/chest, lower back/abdomen, thigh and feet). Five subjects are tested in hot and cold environments for each type of sleeping posture and the microclimatic condition in a confined space between the micro-sensors and human body are studied. A human perception data is collected based on level of hotness and humidity that is felt by subjects. A detailed analysis is done based on the relationship of the data obtained and the variation of environment and subject’s BMI value. Results show the interaction of temperature and relative humidity based on the different sleeping postures. The BMI values are compared to the findings of the study. A general manipulation of environment of the subjects being tested are also taken in count. Relationships involving the sleeping postures and BMI with the human comfort in terms of temperature and relative humidity is compared. Relationships between the temperature and relative humidity measured are correlated in the final part of this thesis respectively with the perception data of hotness and humidity obtained. The temperature measured coincides with the level of hotness, whereas the relative humidity recorded coincides with the level of humidity rated by subjects

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