Comfort Air Conditioning PDF

___________________________________________________________________________ 2. COMFORT AIR CONDITIONING 2.0 SYNOPSIS Air conditioning which deals with the comforts of human beings in an enclosed conditioned space is known as Comfort Air Conditioning There are a number of...

___________________________________________________________________________ 2. COMFORT AIR CONDITIONING 2.0 SYNOPSIS Air conditioning which deals with the comforts of human beings in an enclosed conditioned space is known as Comfort Air Conditioning There are a number of factors that influence the comfort conditions. The effect of all these factors individually and collectively have been discussed in this paper 2.1 INTRODUCTION The term 'Air Conditioning' was coined by Mr. S.W. Cramer in 1906 while he was making efforts in putting the air in a fit condition for the textile industry. The term has since come into use in its broader sense implying control of any or all of the physical or chemical properties of air within any enclosure. Comfort airconditioning has been defined by Dr. D.W. Carrier as under: “Artificial simultaneous control within enclosures of variable humidity, temperature, air motion and air cleanliness.” Odour control is another factor concerning comfort which has been subsequently included in the above definition. Any change in these conditions results in a change in the physiological functions of the body and the body tries to adjust itself to the changing outside conditions. The performance of adjustments takes time and sensation of comfort or discomfort would depend upon the quick or slow adjustment. Often the adjustment may not be reached with consequent increase in discomfort. 2.2 WHAT IS COMFORT ? Comfort is a subjective quantity related to the ease with which an individual maintains a thermal balance between, himself and the environment. As such, feeling of great satisfaction with surrounding conditions may provide physical comfort. But human beings are complex in nature and feeling of comfort in them may depend upon state of mind, physical condition and state of activity. Moreover, feelings of individual comfort may differ for the same individual at different times. It may depend upon degree of acclimatization or even dress. So a compromise regarding the average standard of comfort and the individual characteristics has to be made. This compromise should be on the side of actual natural conditions prevailing at a time, to make the process of conditioning cheaper. These standards have been adopted based partly on experience and partly on tests conducted on individual. ________________________________________________________________________