60 calculate the cooling coil and heating coil load for the air conditioning plant to maintain the room at 24 C DBT and 50% relative humidity. the outdoor air at 30 C DBT and 80 % relative humidity , the mixing ratio of the return air to the outdoor air is (3/1) as shown in the figure . the apparatus dew point of the cooling coil is 9 C and the contact factor is 90% and the sensible and latent heat gain to the room are 8 kW *. and 6kW respectively Qs=8kw R 4Q=6kw MR- no R R Room DBT= 24 c RH =50% M Ang DBT- 300 RH=80% To=9c B= 90% 60 calculate the cooling coil and heating coil load for the air conditioning plant to maintain the room at 24 C DBT and 50% relative humidity. the outdoor air at 30 C DBT and 80 % relative humidity , the mixing ratio of the return air to the outdoor air is (3/1) as shown in the figure . the apparatus dew point of the cooling coil is 9 C and the contact factor is 90% and the sensible and latent heat gain to the room are 8 kW *. and 6kW respectively Qs=8kw R 4Q=6kw MR- no R R Room DBT= 24 c RH =50% M Ang DBT- 300 RH=80% To=9c B= 90%