When the outdoor temperatures are 40 ° C DBT and 26 ° C WBT , an air conditioning system is used to maintain a building at 25 ° C DBT and 50 % RH. In a conditioned building , the sensible load is 100 kW , while the latent load is 20 kW. 14% of the outdoor air is mixed with 86% of the return air on a mass basis. Before it is supplied to the conditioned zone, the mixed air is cooled by a cooling coil. During this process, the temperature of chilled water inside the coil increased by 5.6 ° C. (1) The condition of the air after supply, (2) The required cooling capacity in tons, (3) The rate at which chilled water passes through the cooling coil, (4) The By-pass factor of the cooling coil, and (5) The air flow rate required for ventilation .

When the outdoor temperatures are 40 ° C DBT and 26 ° C WBT , an air conditioning system is used to maintain a building at 25 ° C DBT and 50 % RH. In a conditioned building , the sensible load is 100 kW , while the latent load is 20 kW. 14% of the outdoor air is mixed with 86% of the return air on a mass basis. Before it is supplied to the conditioned zone, the mixed air is cooled by a cooling coil. During this process, the temperature of chilled water inside the coil increased by 5.6 ° C. (1) The condition of the air after supply, (2) The required cooling capacity in tons, (3) The rate at which chilled water passes through the cooling coil, (4) The By-pass factor of the cooling coil, and (5) The air flow rate required for ventilation .

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter36: Refrigeration Applied To Air-conditioning

Section: Chapter Questions

Problem 9RQ: What are higher-efficiency refrigerant blends that can be used as long-term replacements for R-22 in...

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