Portable Air Conditioner with Water Cooled Condenser

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The project relates to fabrication of an indirect cooling arrangement for condensation happening in the condenser for a household AC unit. The heat of condenser can be rejected to a heat conveying fluid water which would act as a coolant .The heat transferred to coolant can be further rejected in atmosphere by an another cooling arrangement e.g. an heat exchanger over the roof top of house. For such purpose the condenser of the window AC is to be submerged inside a container containing the coolant liquid e.g. water and can be named as heat exchanger of condenser (HEC).A pump is to be implanted into the container whose job is to pump the water to the heat exchanger in the environment (HEE) i.e. over the roof top. The HEC and HEE are connected with hose pipes in which there is a transfer duct and return duct. HEE is having an evaporative cooling arrangement which can cool the water by evaporative action. Advantage of such system of over AC is, in conventional system, for window AC there must be a window at appropriate place so that heat can be rejected to the surrounding. In case of basements of building or the houses where there is no proper place for window or the window cannot be blocked (As its purpose is ventilation) We have to implant an split AC in which the evaporator unit is inside the room i.e. the cooling space while the condenser is kept outside . In split AC the refrigerant is altogether circulated between the condenser and the evaporator. In case of split AC the amount of refrigerant needed is more as the entire duct connecting the condenser and the evaporator increases the volume in which the refrigerant circulates. So the cost is increased.

The working consists of the rejection of heat in HEC from condenser to condensing fluid i.e. water. The hot water is transferred to HEE over the roof i.e. in open environment. There the hot water is cooled by evaporative cooling arrangement. The cold water is returned back to HEC by the return duct. Thus indirect cooling of condenser is accomplished. There is an HEC which is full of water and the condenser tubing is submerged in water. Water is acting as a coolant. The heat of condenser is rejected in water. The hot water so formed is supplied to HEE by the help of a pump through supply duct .The HEE is kept at an appropriate cool place where proper cooling of water is done. The cool water of HEE is then again sent back to HEC by the return duct. The refrigerant so condensed passes through a throttle valve to the evaporator tubing. The air of room is then circulated through the evaporator for getting refrigerating effect. After passing through the evaporator, the refrigerant is then sent to compressor to complete the thermodynamic cycle. Appropriate additive is added to water to enhance the heat transfer rate in HEC and anti corrosive effect to condenser tubing.


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  • Name:
    Atul Kumar
  • Type of entry:
  • Patent status: