If you have a room (12*8*4m) and you have 2 solar windows (the dimension of the...
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If you have a room (12*8*4m) and you have 2 solar windows (the dimension of the window (2.5*2m)) located in the largest wall and the solar gain of them 1.3 kW/day and you have a door (1.6*2.5 m) in the northern wall and the temperature inside = 21°C and the average temperature outside = 8 C and the natural air change = 1.8 time /hour/day and the characteristics of materials are shown in the table below - Elements U value Window 1.8 W/m .K 2 Door 2.9 W/m .K South and North wall East and west wall Roof Floor 2 0.6 W/m .K 2 0.75 W/m .K 2 0.65 W/m .K 0.85 W/m .K If you know that you have 3 fixture lighting units of 40 W and the efficiency of them 50% and their runtime is 7 hours /day and there are 2 persons are sleeping and they are present 5 hours/day and if you have the following appliance Appliance Running time Small dough roller 0.1 hour Large refrigerator 5 hours Blender 0.1 hour From your heat balance result decide if we will need a cooling or a heating system? If you have a room (12*8*4m) and you have 2 solar windows (the dimension of the window (2.5*2m)) located in the largest wall and the solar gain of them 1.3 kW/day and you have a door (1.6*2.5 m) in the northern wall and the temperature inside = 21°C and the average temperature outside = 8 C and the natural air change = 1.8 time /hour/day and the characteristics of materials are shown in the table below - Elements U value Window 1.8 W/m .K 2 Door 2.9 W/m .K South and North wall East and west wall Roof Floor 2 0.6 W/m .K 2 0.75 W/m .K 2 0.65 W/m .K 0.85 W/m .K If you know that you have 3 fixture lighting units of 40 W and the efficiency of them 50% and their runtime is 7 hours /day and there are 2 persons are sleeping and they are present 5 hours/day and if you have the following appliance Appliance Running time Small dough roller 0.1 hour Large refrigerator 5 hours Blender 0.1 hour From your heat balance result decide if we will need a cooling or a heating system?
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Step1 Calculate the heat gain from the solar windows The solar gain from each window is 13 kWday Since there are 2 windows the total solar gain is 2 13 kWday 26 kWday Step2 Calculate the heat loss fro... View the full answer
Related Book For
Income Tax Fundamentals 2013
ISBN: 9781285586618
31st Edition
Authors: Gerald E. Whittenburg, Martha Altus Buller, Steven L Gill
Posted Date:
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