Establishing The Heating Load And Outside Design Temperature - Panasonic WH-SDF03E3E5 Series Design Handbook

5.3 Establishing the heating load and outside design temperature

Aquarea air / water heat pump – design handbook 07 / 2014
Panasonic Aquarea Designer | Establishing the heating load and
View of the Start user interface of the Panasonic Aquarea Designer for calculation
and optimisation of heat pump heating systems
The heating load of a building is determined according to EN 12831
"Method for calculation of the design heat load". For new buildings design
heat loads are derived from the planning documents. The heating load is
calculated assuming an outside design temperature
be derived from CIBSE Guide A: 'Environmental Design', table 2.4. In
the UK, this typically varies beween -1 ˚C and - 5 ˚C at sea level. This
temperature is equal to or is exceeded for 99 % of the hours in a year.
A selection is reproduced in the table below. Please note: If using the
closest location to your site in the table, you must decrease the tempera-
ture by 0.6 ˚C for every additional 100 metres above sea level.
Location
Belfast
Birmingham
Cardiff
Edinburgh
Glasgow
London
Manchester
Plymouth
Determination of standard outside temperature θe according to CIBSE Guide A:
Environmental Design
outside design temperature
Altitude (metres)
68
96
67
35
5
25
75
27
Project Design
θ
e. This value can
Temperature (˚C)
-1 .2
-3 .4
-1 .6
-3 .4
-3 .9
-1 .8
-2 .2
-1 .2
67