year round aircondition on window air condirioner

This project works in all weather conditions and seasons

1. YEAR ROUND AIR CONDITIONING ON WINDOW AIR CONDITIONER J.PREETHIBAN B.E B.MUTHU RAJ B.E

2. History summer Air Conditioning system Winter air conditioning systems Year round air conditioning systems Design Features for year round air conditioning contents

3. Temperature of air: Maintenance of any desired temperature within closed space irrespective of the outside temperature. This is done by addition or removal of heat Humidity: Maintaining the RH means to maintain the moisture of the the air by removing or adding the moisture by proper means. Human body is comfortable at 21 C and 60%RH Factors affecting comfort air conditioning

4. 3) Purity of the air: We do not feel comfortable while breathing contaminated air even if it is at comfortable temperature and RH. So proper filtration and cleaning of the air is required Motion of air Circulation of the air is important to maintain the constant temperature. So there must be equi -distribution of the air throughout the space to be conditioned.

5. Circulation fan- Move the air to and from the room air conditioning unit- It is unit which consists of cooling and dehumidifying processes for summer and heating and humidification for winter. supply outlet- These are grills which distribute the conditioned air evenly in the room. Filters – The main function of the filter Is to remove dust , dirt and other harmful bacteria. Components of air conditioner

6. It is used where cooling and dehumidification of air is required For summer air conditioning normal vcr cooling cycle takes place. This process heat is rejected in condenser , heat is absorbed in evaporator and cooling is given to the room Conditioned air is supplied to the room by fans. Summer air conditioning

7. Flow diagram of year round air conditioning unit

8. In few areas in the world it is vary difficult to live in winter Winter air conditions are used to heat the space for human comfort Its input and output is reversed to that of the summer air conditioner HUMAN COMFORT IN WINTER

9. In winter outside air temperature is less than the human comfort temperature and RH is also less. Its components are same as that of the summer air conditioning system Only the difference is it works under reverse vcr cycle. In this process evaporator acts as condenser and condenser acts as evaporator and heat air is supplied. Air gets heated and humidified to a designed condition and supplied to room Winter air conditioning

10. An evaporator during the winter operation acts as a condenser in summer and vice versa . Proper valve adjustment is required and its control is required for proper functioning of system

11. In several countries both winter and summer is uncomfortable Under such adverse weather condition air conditioner must provide comfort conditioning throughout the year Such system is known as year round air conditioning . Year round air conditioning system

12. Heating and humidification of air in winter cooling and dehumidification in summer Functions of Year round air conditioning

13. Year round air conditioning can be obtained by connecting the solenoid valves in the system. The valves works under normal open , normal close by giving electrical power supply Working of Year round air conditioning unit

14. In this system cooling and heating coils acts as evaporator and condenser Vapour is used as a refrigerant Compressor is required for circulation of refrigerant Valves are used to control the flow rate and direction of the refrigerant according to the requirement By using vapour as a refrigerant

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