A Guide to HVAC Building Services Calculations - download pdf or read online

By Kevin Pennycook, D. Churcher, D. Bleicher

ISBN-10: 0860226573

ISBN-13: 9780860226574

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System losses/gains This will include fan gains. The temperature of the air passing through a fan can be raised 1-3°C, and the temperature difference between the air in the duct and the air surrounding the duct may result in some heat transfer. This may have implications on the required level of insulation and therefore raise capital costs. Separating a building into zones enables the temperatures in each zone to be controlled more accurately, particularly when there are varying heat gains between zones.

Find the heights and areas of three chimneys on top of a building 10 m high. All boilers burn non-sulphur bearing fuel. Step 3. 3 (right hand side of chart). This should then be added to the building height to give the final chimney height. Boiler A produces 5 MW Boiler B produces 14 MW Boiler C produces 9 MW A to B is 10 m B to C is 15 m C to A is 19w5 m Volume flow rate for A is 4w3 m³/s Volume flow rate for B is 12w1 m³/s Volume flow rate for C is 7w8 m³/s Procedure – multi-chimneys Step 1. Work out the final chimney height as previously shown.

The sensible heat gains affect the temperature within the space, whereas the latent gains affect the humidity in the space. References Heat emission can vary from 90 W sensible and 25 W latent per person when seated at rest to 190 W sensible and 250 W latent per person for heavy work at 20°C. 3 of CIBSE Guide A. The three main considerations when dealing with occupancy gains are: Occupancy hours – Is the building used for daytime use only or is it used 24 h/day (such as call centres and hospitals).

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A Guide to HVAC Building Services Calculations by Kevin Pennycook, D. Churcher, D. Bleicher

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