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ENERGY CONSUMPTION COMPARISON - CONVENTIONAL PLASTERING V/S
PRATLIPERL
WALL OF ROOM 1 WALL OF ROOM 2
Wall With Conventional Plastering with Wall with Pratliperl Plastering and loose fill
cavity in cavity
ROOM 1 ENERGY CONSUMPTION
The 'u' value of Wall of Room 1 can be calculated as follows:
u = 1.5 = 5.36
0.28
ROOM 2 ENERGY CONSUMPTION
The 'u' value of Wall of Room 2 can be calculated as follows:
u = 0.15 = 0.536
0.28
ROOM 1 V/S ROOM 2 ENERGY CONSUMPTION DIFFERENCE
The proportion of difference is hence : 0.536 = 1
5.36 10
CONCLUSION
The total k value of wall =
sum of 1 of each material.
k
Typically, a plastered 280mm
- cavity wall has a k-value of
1.5W/m °C
The total k value of wall = sum
of 1 of each material.
k
Typically, a Pratliperl plastered
280mm - cavity wall with loose
Pratliperl fill in the cavity has a kvalue
of 0.15W/m °C
A Pratliperl plastered wall with loose Pratliperl fill will lose only a tenth (0.1) of the heat (or in other words
heat that would enter in to the room) that an ordinary 280mm plastered cavity wall would loose.
Example, if the cost of electricity is (US$/Dhs/Rs) 1.00 per KW/Hour and that the room must remain at a
constant temperature of 5 °C and the outside temperature is 25°C it would cost 10.00 or 10 times more per
KW/hour to keep the inside temperature of Room 1(with conventional plastering) at 5°C compared to Room 2
(Pratliperl Plastering).
Thus the total cost saving in energy through Pratliperl Plaster solution is 90%.
05Energy Saving Calculation.doc Page 2 of 2