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BEC Energy Modelling
John Herbert
Registered Energy Assessor (REA)
The Hong Kong Building Energy Code abbreviated to BEC, specifies
the requirements for BEC building energy modelling, and its also used
by BEAM PLUS Energy Use, signed by REA, to predict the annual energy
consumption in the target building.
Using approved energy modelling software, the building envelope and HVAC
equipment are assembled viturally, in the computer, before the first brick
has been laid. And verious scenerio can be reviewed based on the Hong Kong
weather data.
The energy efficiency requirements for the HVACR equipment shall comply
with the latest BEC version, and or, if known the actual equipment. .
The building envelope including the material used for the walls, glazing,
and roof, etc. would be be modelled, and different scenarios can
demonstrate energy improvements to assess the annual and lifetime
energy cost.
The energy modelling software output is collated to prepare charts
to demonstrate visually the monthly and annual consumption for the
target building and any other scenarios considered. And the whole
packaged into a energy report, to be signed by Registered Energy
Assessor.
Whole Life Time Cost Of Building
The construction cost is say 2-5% of the lifetime cost,
it means its important to study and optimise the whole
life of the building before breaking ground.
Decisions are all made at the design stage, at least the important
ones are, but these can be amended while the building is still on
drawing board, before any concrete is poured or orders placed.
Glazed units and windows, having a low U value (high performance)
as low as 1.5 - 1.6 W/sqm/k are easily available (2017) without
breaking the bank.
Call Kelcroft's energy simulation experts today!