4-b) The room sensible and latent heat loads for an air-conditioned space are 25 kW and 5 kW respectively. The room condition is 25 °C dry bulb temperature and 50 % relative humidity. The outdoor condition is 40 °C dry bulb temperature and 50 % relative humidity. The ventilation requirement is such that on mass flow rate basis 20% of fresh air is introduced and 80 % of supply air is recirculated. The by-pass factor of the cooling coil is 0.15. Determine: (a) supply air flow rate; (b) outside air sensible heat; (c) outside air latent heat; (d) grand total heat; and (e) effective room sensible heat factor Outside air f = 40°C $; = 50% Mixing A Q₁ +Q²₂ Recirculated air BPF= 0.15 Cooling coil Supply air 4 CamScanner Conditioned space = 25°C $₂ = 50% 8

4-b) The room sensible and latent heat loads for an air-conditioned space are 25 kW and 5 kW respectively. The room condition is 25 °C dry bulb temperature and 50 % relative humidity. The outdoor condition is 40 °C dry bulb temperature and 50 % relative humidity. The ventilation requirement is such that on mass flow rate basis 20% of fresh air is introduced and 80 % of supply air is recirculated. The by-pass factor of the cooling coil is 0.15. Determine: (a) supply air flow rate; (b) outside air sensible heat; (c) outside air latent heat; (d) grand total heat; and (e) effective room sensible heat factor Outside air f = 40°C $; = 50% Mixing A Q₁ +Q²₂ Recirculated air BPF= 0.15 Cooling coil Supply air 4 CamScanner Conditioned space = 25°C $₂ = 50% 8

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Question

4-b) The room sensible and latent heat loads for an air-conditioned space are 25 kW and 5 kW
respectively. The room condition is 25 °C dry bulb temperature and 50 % relative humidity. The
outdoor condition is 40 °C dry bulb temperature and 50% relative humidity. The ventilation
requirement is such that on mass flow rate basis 20% of fresh air is introduced and 80 % of supply
air is recirculated. The by-pass factor of the cooling coil is 0.15.
Determine: (a) supply air flow rate; (b) outside air sensible heat; (c) outside air latent heat; (d)
grand total heat; and (e) effective room sensible heat factor
Outside air
f = 40°C
$; = 50%
Mixing
Recirculated air
BPF=
0.15
Cooling coil
Supply
air
CamScanner
Conditioned
space
= 25°C
$₂ = 50%
8

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