BREDEM - BRE domestic energy model: background, philosophy and description
Series/doc. No
Report
Report 66
Year
1985
Abstract
BREDEM is a model for the calculation of the annual energy requirements of domestic buildings, and for the estimation of savings resulting from energy conservation measures.
ISBN
9780851253510
Author
Anderson, B. R. et al
Subject(s)
Special subject areas
Environmental issues/energy
Energy efficiency
Supplement
Building. To subscribe to The Construction Information Service please telephone Customer Care on +44 1344 328300
Keyword(s)
space heating
;
external wall
;
heating systems
;
heating system
;
windows and doors
;
heat loss
;
cavity wall
;
cavity walls
;
double glazing
;
building components
;
heat losses
;
timber frame
;
energy savings
;
flat roof
;
energy conservation
;
expanded polystyrene
;
energy saving
;
double glazed
;
loft insulation
;
water heating
;
central heating
;
solid walls
;
cavity fill
;
living rooms
;
floor insulation
;
suspended floor
;
gas fire
;
solid floor
;
solid wall
;
washing machine
;
oil boilers
;
electric storage heaters
;
storage heaters
;
solar panel
;
gas central heating
;
space heating system
;
heat storage
;
cast concrete
;
solid fuel boiler
Publisher History
Formerly known as the Building Research Establishment, BRE is wholly owned by the BRE Trust. Their activities include research, consultancy, training and certification. They publish a range of reports, information papers, guides, digests, and case studies covering all aspects of construction.
Table Of Contents
|
List of tables
|
iv
|
|
Figures
|
v
|
|
Summary
|
vi
|
|
Part 1: Background: outline of the model; application
|
1
|
|
Introduction
|
1
|
|
Concept of the model
|
1
|
|
Current versions of BREDEM
|
2
|
|
Version numbering
|
2
|
|
Data for calculation
|
2
|
|
Energy efficiency and environmental performance
|
3
|
|
Conclusion
|
4
|
|
Part 2: The basis of the model and specification of BREDEM-2
|
5
|
|
1 Introduction
|
6
|
|
2 Space heating
|
6
|
|
3 Other energy demands
|
9
|
|
4 Application
|
9
|
|
5 Conclusion
|
10
|
|
Appendix 1-Derivation of the calculation method (BREDEM-2)
|
11
|
|
Appendix 2-The calculation method and examples of its use (BREDEM-2)
|
27
|
|
Appendix 3- Differences between BREDEM-2 and BREDEM-1
|
51
|
|
Part 3: BREDEM-3: “Energy matters” version
|
53
|
|
1 Introduction
|
54
|
|
2 Background to “Energy Matters” project
|
54
|
|
3 The calculation procedure: BREDEM-3
|
55
|
|
4 Space heating
|
55
|
|
5 Water heating
|
61
|
|
6 Cooking
|
61
|
|
7 Lighting and appliances
|
61
|
|
8 Assessment of conservation measures
|
62
|
|
Tables of data (tables 13 to 20) (see list on page iv)
|
63
|
|
Appendix 4-Differences between BREDEM-3 and BREDEM-2
|
69
|
|
References
|
70
|
|
Part 2: BREDEM-2
|
35
|
|
Table 1 U-values if building components: (a) Windows (b) Walls (c) Roofs (d) Floors
|
35
|
|
Table 2 Ventilation rates
|
36
|
|
Table 3 Representative heat loss characteristics of various house types
|
37
|
|
Table 4 Classification of heaters and heating systems by responsiveness and estimated efficiencies
|
38
|
|
Table 5 Internal and solar gains
|
39
|
|
Table 6 Mean temperatures: responsive heating systems:
|
40
|
|
Demand level in living room 17°C
|
40
|
|
Demand level in living room 21°C
|
41
|
|
Demand level in living room 25°C
|
42
|
|
Table 7 Mean temperatures: mixed heating systems:
|
43
|
|
Demand level in living room 17°C
|
43
|
|
Demand level in living room 12°C
|
44
|
|
Demand level in living room 25°C
|
45
|
|
Table 8 Mean temperatures: non-responsive heating systems:
|
46
|
|
Demand level in living room 17°C
|
46
|
|
Demand level in living room 21°C
|
47
|
|
Demand level in living room 25°C
|
48
|
|
Table 9 Annual degree-days to base 15.5°C for various regions of the UK. (Average values for 20 years 1960-1979)
|
49
|
|
Table 10 Annual degree-days for base temperatures between 5°C and 20°C: Inland sites
|
49
|
|
Table 11 Annual degree-days for base temperatures between 5°C and 20°C: South and West Coastal sites
|
50
|
|
Table 12 Annual degree-days for base temperatures between 5°C and 20°C: East coastal sites
|
50
|
|
Part 3: BREDEM-3
|
63
|
|
Table 13 Default values (dwelling size)
|
63
|
|
Table 14 U-values used in BREDEM-3:
|
64
|
|
Walls; Glazing; Roofs; Floors
|
64
|
|
Table 15 Internal and solar gains
|
65
|
|
Table 16 Classification of heaters and heating systems by responsiveness and estimated efficiencies
|
66
|
|
Table 17 Degree-days to base 15.5°C for various regions of the UK
|
67
|
|
Table 18 Degree-days: Equations for converting to other base temperatures
|
67
|
|
Table 19 Water heating efficiencies
|
68
|
|
Table 20 U-values following conservation measures
|
68
|
|
Figures
|
14
|
