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Sample 1 |
Small Meeting Room Hvac System (%100
outside air) |
| Winter Heat Loss : 50,000 kcal/h |
| Air Supply :10,000 m3/h min. (200 person,50
m3/hr per person) |
| Room Design Temperature:22'C |
| Room Design Rel.Humidity :%50 rH (from
table ) |
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| Winter Outside Design Temperature :-12'c |
| Winter Outside Design Rel.Humidity :%90 rH |
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| Design Step 1: |
| Mark inside design point on Psychometric Chart
<1> , and outside air design point <2> |
| Find Room Absolute humidity from chart .(8.2
g/kg ) |
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| Design Step 2: |
| Find supply air tempreture & humidity. |
| Find supply air temperature |
| Formula: Q=m*C*DT |
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| Q=Heat Loss in Kcal/h |
| m=Air Mass Quantity in kg |
| m=V*q |
| V=Air SupplyAmount in m3/h |
| q=Air Density in kg/m3 :1,2 kg/m3 |
| C=Air Spesific Heat :in kcal/kgC:0,24 kcal/kgC |
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| DT=Supply Air Temp(Ts).-Room Air Temp (22'C)(Tr) |
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Now Formula |
| 50,000 (q)=10,000 (V)*1,2 (q)*0,24 (C)*DT |
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| DT=50,000/(10,000*1,2*0,24)=17,3'C |
| 17,3 =Ts-22'C |
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| Ts=22+17,3 =39,3'C |
| Now We know supply air temperature :39,3 'C |
What is air supply humidity. |
| We must supply air in room's absolute humidity
(8.2 g/kg). |
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| Continue |
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