M&E

M&E

Heating
1. Radiators
  1. key points
    1. simple and compact
    2. Occupants familiar with function
    3. low maintianance
    4. good temp control
    5. range of styles = flexible to layouts
  2. limitations
    1. slow thermal response
    2. heat output is convective
      1. can lead to uneven temperature gradient in the space
    3. furniture must be positioned sympathetically to avoiding obstructing the heat output
    4. the combination of windows that can be opened and perimeter radiators can result in excessive heat loss if the windows are poor design
  3. Used in naturally ventilated building
  4. located around perimeter walls
    1. offset cold down drafts from glazing and prevent condensation forming on glass
  5. temperature control achieved through thermostatic radiator valves (TRVs)
    1. individual and local control
  6. two basic types
    1. pressed steel panel
    2. cast extruded type - normally alluminium
2. Convectors
  1. Key points
    1. quicker warm up times in comparison to radiators
    2. fan convectors provide high heat output for the unit size
    3. convection current by unit provides good air movement
    4. fan convectors provide greatly enhanced heat output and air movement
    5. the casing can reduce the risk of burning which can occur with radiators
  2. Limitations
    1. Dust/dirt collects in the casing which required periodic cleaning
    2. trench convectors tend to accumulate dirt an the grille can become covered by furniture
    3. fan convectors incorporate many components and lack the simplicity of radiators and natural convectors
    4. require a power supply
  3. Natural convectors
    1. casing with top and bottom openings
    2. Enter text here
3. Radiant Heating
4. Warm air unit
5. boilers
Ventilation
Air-conditioning
1. introduction to Air con systems
2. Constant volume (CV)
3. Variable air volume (VAV)
4. Displacement ventilation
5. fan coils
6. chilled beams
7. chilled ceilings
8. Room-based heat pumps
9. split systems
10. Variable refrigerant flow systems (VRF)
11. Chillers, dry coolers and cooling towers
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	Criado por alison_patey0437 mais de 11 anos atrás