Author: Haroon Khalil

Temperature difference exists between outset and inside of a building and at difference units of a building. Heat is transferred from warm to cool place. The transfer of heat may take place by conduction, convection or radiation. Heat transfer mainly happens due to conduction through the solid building materials. This heat transfer depends on the…

Essential requirement for an air-conditioning system are as follows: Figure 28.5 shows a simple air-conditioning plant. Figure 28.5 Typical air-conditioning plant 1. Filters These are used to have effective cleaning of the air so as to remove dust or other suit particles from it. Filters used for this purpose are either dry or viscous type. Dry…

Based on the location of air-conditioning equipment, the systems of air-conditioning are classified into the following four systems: All the above systems invariably adopt the same cycle of operations as given below. 1. Central System In this system all the equipment and accessories needed are installed one focal point or central point. From this point…

Air-conditioning for comfort has to provide a healthier atmospheric conditions. As atmosphere is a function of temperature, air motion or velocity and humidity, the principles of air-conditioning should involve the proper control of these parameters. 1. Temperature Control The range of temperature which is suitable to majority of people is called the comfortable zone. The comfortable…

Classification of air-conditioning may be made based on functional point of view and process point of view. 1. Functional Point of View Following are the two types of air-conditioning based on functional point of view. (i) Comfort Air-conditioning In this type of air-conditioning, air inside the room or the stipulated space is created so as…

Following terminologies are used in air-conditioning: 1. Psychometrics It is the branch of science that deals with the study of mixture of dry air and water vapour and is also the subject connected with the study of the behaviour of moist air. 2. Dry Air It is a mechanical mixture of gases comprising of oxygen,…

Air-conditioning of any building or space is adopted to satisfy one of the objects mentioned below. 1. Residential Buildings For human beings living in residential buildings, the conditioned air is expected to give a better health or to preserve and maintain the health, comfort and convenience. 2. Industrial Premises Industrial air-conditioning may be required to…

Air-conditioning primarily consists of refining air in order that it may be utilised to the best advantage of the user. The user may be human beings, materials, equipment, etc. Thus conditioned air would mean an atmosphere having controlled temperature, humidity and velocity condition with dust-free cleanliness to meet the requirement.

As the atmospheric conditions vary, there is a need to condition the air to suit the need of the occupants. This is done by the process of air-conditioning the air so as to simultaneously control temperature, humidity and movement of the air with due control on distribution and cleanliness. This requirement of occupants of a…