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Reports on research to study the effect on energy consumption of different kinds of air supply and exhaust systems in a room. Based on the air temperature distribution of the room with a displacement ventilation system and well-mixed system, which were calculated by an airflow program, the cooling load program ACCURACY and the energy analysis program ENERK were used for the calculation of the space load and the annual energy consumption of the room. Presents the results. States they show that the air temperature distributions in a room are very important in the prediction of room energy consumption. For a variable air volume system the energy required by the chiller and the fan with the displacement ventilation system is 26% less than is required for the well- mixed system. Recommends the air displacement system for practical applications for saving energy and obtaining better indoor air quality.


KEYWORDS: Research, energy consumption, ventilation, displacement ventilation, comparing, computer programs.

Citation: ASHRAE Transactions, vol.96, pt. 1, Atlanta, 1990