AIR CONDITIONING

IN THIS I HAVE EXPLAIN YOU ABOUT THE AIR CONDITION AND ALSO I HAVE EXPLAIN IN THIS ABOUT THE CLASSIFICATION OF AIR CONDITIONING

1. Course : INDUSTRIAL INTERNSHIP Course code : BTME 4008 Semester : VII Year: I V th (M echanical engg ) Academic session : FALL 202 1 -202 2 TOPIC: Air Conditioning And It’s Types SUBMITTED BY - NAVED KHAN ADM N : 18SCME10100 04 SCHOOL OF MECHANICAL ENG INEERING GALGOTIAS UNIVERSITY SUBMITTED To: - Mr Praveen Sir Mrs Priyanka Jain

2. Overview: Defination of Air Conditioning Human Comfort Why Do we Need A.C? Advantages & Disadvantages of A.C Ideal Room Temperature Classification of Air Conditioning Breifly explanation of Window Air Conditioner Parts The Refrigeration System Installation Installation Parameters fdfd Breifly explanation of Split A.C.: Parts & Installation Difference between Window and Split A.C : 10 Easy steps to find out A.C. Tonnage

3. What is meant by “ Air Conditioning” Air conditioning (often referred to as A/C or AC ) is the process of altering the properties of air (primarily temperature and humidity) to more comfortable conditions, typically with the aim of distributing the conditioned air to an occupied space to improve thermal comfort and indoor air quality . Air conditioning is defined as a process which cools (or heat) , clean, circulates, freshen air, and controls its moisture content simultaneously. Most of the air conditioning, particularly in India and such other countries, is about cooling : i.e. removal of heat from an enclosed space. In the most general sense, air conditioning can refer to any form of technology that modifies the condition of air (heating, cooling, (de)humidification, cleaning, ventilation, or air movement).

4. Human Comfort: The four atmospheric condition which affect human comforts are:- An air conditioner controls the above factors for us to achieve human comfort. Most people (90%) are comfortable when the air temperature is between 18-22°C and the %sat is between 40-65%.

5. Why Do we Need A.C? In a well climatically designed building human comfort factors are controlled naturally, that is the best solution. In big building/complexes it is not possible to design entire building comfortably by natural energy sources like sun, wind, orientation etc. In such cases we have to take the help of mechanical mean for obtaining comfortable conditions inside the building. The science & practice of creating a controlled climate in indoor space is called Air conditioning. Outside air is quite likely to be at a different condition from the required comfort zone condition. In order to bring its condition to within the comfort zone we may need to do one or more of the following:-heat it; cool it; dehumidify it; humidify it; or mix it. Due to the various sources of heat the temperature inside the room becomes very high and the relativehumidity can also be high. Further, there can also be less flow of air inside the room. All these factors lead to creation of highly uncomfortable conditionsinside the room

6. Advantages & Disadvantages of A.C:- Advantages: Increased comfort level. In extreme heat, air-conditioning can be a life saver. Most air conditioners also reduce the humidity level, which helps both comfort, and reduces mold growth. Less noise as the windows will be closed. Prevents the dust entering the room as the windows will be closed. Gives constant temperature. Attractive design. Simple control. Easy maintenance. Easy installation. Disadvantages: Most air conditioners use a substantial amount of energy. High cost money . Contributing to pollution from power plants. Older models contain chemicals that can damage the environment if they escape. Encourages laziness. Habitant spending time indoors instead of out. Habitants have less contact with nature. Too cool temperatures will lead to improper blood circulation. Effects the environment by releasing the cfc's.

7. Ideal Room Temperature:

8. Classification of Air Conditioning: Classification based on major function:- (a) Comfort A.C.: Creating atmospheric conditions conductive to human health, comfort & efficiency. A.C. in home, offices, stores, restaurants, theatres, hospitals etc. are of these types. (b) Industrial A.C.: The purpose of these system is to control atmospheric conditions primarily for proper conduct of research & manufacturing e.g. electronics & computer industries, paper mills, textile mills, candy factories, photo processing etc. Classification based on equipments arranged: a) Unitary or “packed” A.C. b) Spit A.C. c) Central A.C. d) Combination of above. Classification based on season of the year: a) Winter A.C.: system: These systems, when properly designed & installed maintain indoor atmospheric conditions for winter comfortable, namely temperature, humidity. Air purity & airmovements, when outside temperature is very cold. b) Summer A.C.: Maintains indoor condition comfortable when outside atmospheric conditions are not comfortable, but it is very hot & dry. c) All year round A.C.: Maintains indoor temperature comfortable throughout the year, while outside temperature may be very cold or hot.

9. Windows A.C.: Classification based on installation position: Windows AC Split or Ductless AC Centralised AC • These types of AC are designed to be fitted in window sills. • A single unit of Window Air Conditioner houses all the necessary components, namely the compressor, condenser, expansion valve or coil, evaporator and cooling coil enclosed in a single box. • Since a window AC is a single unit, it takes less effort to install as well as for maintenance. • This is the most commonly used air conditioner for single rooms. Advantages •Single unit air conditioner. •Less effort needed for installation. •Costs lesser in comparison to other varieties.

10. Parts of on Windows Air Conditioning: The whole assembly of the window air conditioner can be divided into two compartments:  the room side, which is also the cooling side and  the outdoor side from where the heat absorbed by the room air is liberated to the atmosphere. The room side and outdoor side are separated from each other by an insulated partition enclosed inside the window air conditioner assembly. The various parts of the Window air conditioner can be divided into following categories: the refrigeration system, air circulation system, ventilation system, control system, electrical protection system.

11. The Refrigeration System of the Window Air Conditioner: The REFRIGERATION SYSTEM of the window air conditioner comprises of all the important parts of the refrigeration cycle. These include  the compressor,  condenser,  expansion valve and  the evaporator. The refrigerant used in most of the window air conditioners is R22. The compressor used in the window air conditioners is hermetically sealed type, which is portable one. This compressor has long life and it carries long warranty periods. The condenser is made up of copper tubing and it is cooled by the atmospheric air. The condenser is covered with the fins to enable faster heat transfer rate from it. The capillary tubing made up of various rounds of the copper coil is used as the expansion valve in the window air conditioners. Just before the capillary there is drier filter that filters the refrigerant and also removes the moisture particles, if present in the refrigerant. Like condenser, the evaporator is also made up of copper tubing of number of turns and is covered with the fins. The evaporator is also called as the cooling coil since the rooms air passes over it and gets cooled. Just in front of the evaporator there is air filter fitted in the front panel or front grill.  As the room air is absorbed, it is first passed over the filter so that it gets filtered. The filtered air is then blown over the cooling coil and the chilled air is passed into the room. The refrigerant after leaving the cooling coil enters the accumulator where it is accumulated and then it is again sucked by the compressor for recirculation over the whole cycle.

12. Installation of Window Air Conditioner:

13. Installation Parameters For Window Air-conditioner:

14. Split AC These are kits of 2 units, one internal and another external. The indoor unit installed inside a room intakes warm air and throws in cold air. The outdoor unit on the other hand is installed out of the house. It contains the compressor and is linked to the internal unit via drain pipes and electric cables. This external unit throws out the warm air. Split air conditioners are used for small rooms and halls, usually in places where window air conditioners cannot be installed. However, these days many people prefer split air conditioner units even for places where window air conditioners can be fitted. The split air conditioner takes up a very small space of your room, looks aesthetically cool and makes very little noise. Advantages Internal unit takes up less space for installation Usually more silent than window ACs Minimally affect your home decor Can be installed in room with no windows

15. There are two main parts of the split air conditioner. These are: 1) Outdoor unit: This unit houses important components of the air conditioner like the compressor, condenser coil and also the expansion coil or capillary tubing. This unit is installed outside the room or office space which is to be cooled. The compressor is the maximum noise making part of the air conditioner, and since in the split air conditioner, it is located outside the room, the major source of noise is eliminated. In the outdoor unit there is a fan that blows air over the condenser thus cooling the compressed Freon gas in it. This gas passes through the expansion coil and gets converted into low pressure, low temperature partial gas and partial liquid Freon fluid. 2) Indoor unit : It is the indoor unit that produces the cooling effect inside the room or the office. This is a beautiful looking tall unit usually white in color, though these days a number of stylish models of the indoor unit are being launched. The indoor unit houses the evaporator coil or the cooling coil, a long blower and the filter. After passing from the expansion coil, the chilled Freon fluid enters the cooling coil. The blower sucks the hot, humid and filtered air from the room and it blows it over the cooling coil. As the air passes over cooling coil its temperature reduces drastically and also loses the excess moisture. The cool and dry air enters the room and maintains comfortable conditions of around 25-27 degree Celsius as per the requirements.

16. Differences between "Window" and "Split" air conditioners

17. Reference : https://simple.wikipedia.org/wiki/Air_conditioner https://www.engineeringenotes.com/mechanical-engineering/air-conditioning/air-conditioning-definition-factors-and-types-mechanical-engineering/36056 https://www.merriam-webster.com/dictionary/air-condition https://www.slideshare.net/NooruleInieOsman/air-conditioning-system https://www.slideshare.net/arabhinavknp/final-presentation-air-conditioning https://www.slideshare.net/creightonlaircey/how-a-split-ac-works

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