Simulation of radiation cooling system for air conditioning

DOI: 10.17586/1606-4313-2019-18-3-3-14
UDC 621.565.83, 697.97

Simulation of radiation cooling system for air conditioning

Alexandr P. Tsoy, Granovsky A. S., Tsoy D. A., Baranenko A.V.

This paper discusses the possibility of comfortable air conditioning by radiation cooling system that transfers heat by infrared radiation through the planet's atmosphere at night. Computer simulation of the radiation cooling system was performed using weather data for the summer of 2018 in the Almaty city (Kazakhstan). The circulation of the coolant is carried out by pumps, there is a cold accumulator filled with water, radiators occupy the entire roof area of the building, and a finned tube air cooler is used to cool the air. The used computer model is verified by the experiment data obtained before. This model takes into account heat transfer processes in all of the elements. After the adoption of energy efficiency measures (reducing the flow of coolant through the hydraulic circuits to the lowest possible values and reducing the power of the air coolers) the system can maintain the air temperature in the room to be cooled below 25 °C at about 86.8% of the total duration of the season.  With 52 W of total electric motors power the system consumes 69.5 kWh of electricity per season. The specified value is 56% less than the amount of energy consumed by a conventional air conditioner over the considered period of time. The average cooling capacity of the system for the season was 204 W, with the peak value reaching 1200 W.

Keywords: radiation cooling, natural cooling, computer simulation, air conditioning, energy saving.

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