WINTER AIR CONDITIONING SYSTEM

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introduction, classification, types, application, advantages, disadvantages, recent development.

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Mechanical Engineering Department (Academic session: 2014-15) TAE-II ( Technical Presentation ) Topic:- (Winter Air Conditioning System) Guided By :- K. M. Narnaware Presented By :- Dinesh P. Naik Assistant Professor Roll no :- C - 47 Department of Mechanical Engineering. Year/Sem :- 4 th / 8 th .

AIR CONDITIONING SYSTEM:

AIR CONDITIONING SYSTEM Introduction : The air conditioning is a branch of engineering science which deals with the study of conditioning of air i.e. supply and maintaining desirable internal atmospheric conditions for human comfort. This subject is also deals with the conditioning of air for industrial purposes, food processing, storage of foods and other material.

CLASSIFICATION OF AIR CONDITIONING SYSTEM ::

1) According to the purpose : (a) Comfort air conditioning system & (b) Industrial air conditioning system . 2) According to the season of the air : (a) Winter air conditioning system , (b) Summer air conditioning system , and (c) Year – round air conditioning system . CLASSIFICATION OF AIR CONDITIONING SYSTEM :

WINTER AIR CONDITIONING SYSTEM:

WINTER AIR CONDITIONING SYSTEM Introduction : According to season of the year air conditioning system include WINTER AIR CONDITIONING SYSTEM. In winter air conditioning , the air is heated, which is generally accompanied by humidification. In winter the outside conditions are cold and dry. As a result, there will be a continuous transfer of sensible heat as well as moisture (latent heat) f rom the buildings to the outside.

Introduction…:

Hence, in order to maintain required comfort conditions in the occupied space an air conditioning system is required which can offset the sensible and latent heat losses from the building. Air supplied to the conditioned space is heated and humidified in the winter air conditioning system to the required level of temperature and moisture content depending upon the sensible and latent heat losses from the building. In winter the heat losses from the conditioned space are partially offset by solar and internal heat gains. Thus in a conservative design of winter A/C systems, the effects of solar radiation and internal heat gain are not considered. Introduction…

WORKING OF WINTER AIR CONDITIONING SYSTEM:

WORKING OF WINTER AIR CONDITIONING SYSTEM The outside air flows through a damper and mixes up with the recirculated air ( which is obtained by the conditioned space ). The mixed air passes through a filter to remove dirt, dust and other impurities. The air now passes th rough a preheat coil in order to prevent he possible freezing of water and to control the evaporation of water in the humidifier.

Working….:

After that, the air is made to pass through a reheat coil to bring the air to the designed dry bulb temperature . Now, the conditioned air is supplied to the conditioned space by a fan. From the conditioned space, a part of the used air is exhausted to the atmosphere by the exhaust fans or ventilators. Working….

Working…..:

The remaining part of the used air ( known as recirculated air ) is again conditioned. The outside air is sucked and made to mix with recirculated air, in order to make up for the loss of conditioned air through exhaust fans or ventilation from the conditioned space. Working…..

SCHEMATIC ARRANGEMENT OF WINTER AIR CONDITIONING SYSTEM:

SCHEMATIC ARRANGEMENT OF WINTER AIR CONDITIONING SYSTEM

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Winter air conditioning In winter outside temperature is low hence heating of air is needed for comfort. Cycle of operations consists of Air cleaning ii) Air heating iii) Humidification iv) Air distribution/circulation

DIFFERENT TYPES OF WINTER AIR CONDITIONER:

DIFFERENT TYPES OF WINTER AIR CONDITIONER WINDOW AC SPLIT AC

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TOWER AC CASSETTE - AC

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CUBE AIR CONDITIONER AC.

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Temperature control Effective Temp =18 0 C to 22 0 C in WINTER Effective Temp = 20 0 C to 23 0 C in SUMMER For Indian conditions 25 0 C with 60% relative humidity to 30 0 C with 45 % relative humidity, with air velocity not exceeding 10 m/min. During winter humidification is done so that relative humidity is 50 to 60 %.

APPLICATION: :

Winter air conditioning systems is mainly use to convert cold air into hot air. They are used to maintain warmness temperature in the room during winter season. They are especially suited to that region where there is winter season through out the year. They are also used in the big industries where the product need to kept in warm temperature and to maintain that same temperaure for long time. APPLICATION:

ADVANTAGES OF WINTER AIR CONDITIONING SYSTEM:

ADVANTAGES OF WINTER AIR CONDITIONING SYSTEM During winter season outside room temperature is low, hence heating of air needed for comfort. It maintain hot temperature inside room during winter season. It distributes the proper amount of heat in the surrounding area. It increases the humidification .

DISADVANTAGES OF WINTER AIR CONDITIONING SYSTEM:

It can be only used in winter season. It cannot perform the cooling operation . There is no use of winter air conditioner in hot region like Rajasthan. Dual operation air conditioner can be used in all season, so winter air conditioner market is less. DISADVANTAGES OF WINTER AIR CONDITIONING SYSTEM

RECENT DEVELOPMENT IN WINTER AIR CONDITIONING SYSTEM :

For developing this air conditionig , a more advanced air purifier is installed for fresh and clean air. Portable winter air conditioner are now available which can easly adjust in small space. Also available in more advanced qualities. RECENT DEVELOPMENT IN WINTER AIR CONDITIONING SYSTEM

REFERENCES :

Text book : Refrigeration and Air conditioning by (R.S.KHURMI & J.K.GUPTA). Research paper ( Advanced Telecommunications Air Conditioning Systems in the Multimedia Era) By Kazuo OSHIMA*, Masaki NAKAO*, Takashi YAMASHITA**, and Katsuichi YOTSUMOTO* ) *NTT Power and Building Facilities Inc. 3-9-1 1 Midori-Cho, Musashino-Shi, Tokyo, 180 JAPAN **Nippon Telegraph and Telephone Corp. 1-6 Nakase , Mihama-Ku, Chiba-Shi, Chiba, 261 JAPAN REFERENCES

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