Transcript File - Kensa Heat Pumps

MCS Accreditation
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What is MCS?
The MCS (Microgeneration Certification Scheme) certificates microgeneration technologies used
to produce electricity and heat from renewable sources.
The MCS is also linked to financial incentives which include the Renewable Heat
Incentive.
It is designed to provide a level of protection and assurance to consumers as well as a
sign of quality
1
MIS3005 v4
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2
Heat Loss
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A full heat loss calculation is now required on a room by room basis following the British
Standard BS EN12831. To help the installer complete this there is a free software tool which
is available from the MCS website at http://www.microgenerationcertification.org
3
Peak Heat Loss
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Heat loss through a any surface is
dependant on:-
Surface area
Temperature difference
‘U’ value (how well heat flows through the
wall)
Area x U value x Temperature difference
Room by Room Heat Loss
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Ventilation rates
Internal temperatures
Ambient temperatures
All are provided in MIS3005
Typical Losses from a building
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Annual heat load
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Heating degree day (HDD) is a measurement designed to reflect the demand for energy
needed to heat a home or business. It is derived from measurements of outside air
temperatures. The heating requirements for a given structure at a specific location are
considered to be directly proportional to the number of HDD at that location.
To calculate the annual heat load required by a room
Wall area x ‘U’Value x Temp difference x degree days
Warning internal walls do not have an annual load associated with them. The heat flow
from one room will cancel with the heat flow into the room!
Degree days will depend on location in the UK
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Room is at higher temp.
Room is at lower temp.
200W transferred
through wall
200W gained from next
room
Needs to generate extra 200W x
Degree Days
Heat load is reduced by extra
200W x Degree Days
Heat Loss Calculation
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Domestic Heating Design
Guide
9
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Peak Space Heating demand = 5.188kW
Annual Energy Load = 11212kWh/y
Worst Performing Room = Bathroom
110W/m2
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Heat Emitter Guide
Used to:•Provide guidance on sizing of heat emitters
•Provide an SPF (seasonal performance
figure) for the RHI and hence calculate
payments.
•Provide an estimate of running costs to your
client
DHW loads
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