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Advanced Heat Load Estimating

Advanced Heat Load Estimating. In Class Exercise – Week 2. Ductwork Heat Gains: Example: A duct that is 2500mm x 650mm runs through a plant room for 25m before entering a conditioned space. The plant room temperature can be taken as 35°C and the supply air temperature is 12.5°C.

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Advanced Heat Load Estimating

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  1. Advanced Heat Load Estimating In Class Exercise – Week 2

  2. Ductwork Heat Gains: Example: A duct that is 2500mm x 650mm runs through a plant room for 25m before entering a conditioned space. The plant room temperature can be taken as 35°C and the supply air temperature is 12.5°C. The air velocity is 6m/s. Find the heat gain to the conditioned air, • No Insulation. 22,326W • 25mm Insulation 3,898W • 50mm Insulation 2,126W

  3. Ductwork Heat Gains: Example: A Return Air riser that is 1500mm x 1300mm runs vertically up a building to the mid rise plantroom (35m). Two sides of the riser joins a conditioned space while two sides join a fire stair and a toilet area. The return air temperature is 24°C. The air velocity is 6m/s. Find the heat gain to the conditioned air, • 90mm Common Brick i. How much air is flowing in the Return Air riser? ii. Find the heat gain to the riser.

  4. Zoning: Case Study: • AQIS – Constant volume, variable temperature system. Chilled water central plant, hot water reheat. Perimeter Zone/s & Centre Zone/s • Gateway Building Level 47 – Variable volume, constant temperature Chilled water central plant, hot water reheat. Perimeter Zone/s & Centre Zone/s How deep are the perimeter zones?

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