untitled BRITISH STANDARD BS EN 15316 3 1 2007 Heating systems in buildings — Method for calculation of system energy requirements and system efficiencies — Part 3 1 Domestic hot water systems, charac[.]
BRITISH STANDARD Heating systems in buildings — Method for calculation of system energy requirements and system efficiencies — Part 3-1: Domestic hot water systems, characterisation of needs (tapping requirements) ICS 91.140.10 12&23 threshold level f < threshold level (3) (4) y and z are constants Values for x , y and z as well as for the threshold level and minimum level of factor f may be given in a national annex If a national annex is not provided or does not include these values, informative values given in Annex B may be applied These values are based on a domestic hot water requirement in litres per m per day at θW ,del National regulations may require the domestic hot water requirements for single-family dwellings to be calculated separately for the kitchen and the bathroom 5.3.5 Time periods The weekly, monthly or annual energy needs for domestic hot water are obtained by multiplying the energy needs per day by the appropriate number of days If different cold water supply temperatures are used for the 11 BS EN 15316-3-1:2007 EN 15316-3-1:2007 (E) calculations, determination of the weekly, monthly or annual energy needs for domestic hot water is based on the number of days associated with each cold water supply temperature used For this purpose, the number of days associated with each cold water supply temperature used should be provided in a national annex 5.4 Energy needs for domestic hot water based directly on floor area This method is characterised by the assumption that there is a linear relationship between the energy needs for domestic hot water and the floor area of the building In this case, the energy need for domestic hot water QW may be calculated by: QW = QW , A,day ∗ A (MJ/day) (5) where QW , A,day is a specific energy need for domestic hot water in MJ per m per day based on a defined water delivery temperature (e.g 60 °C) and a defined cold water supply temperature (e.g 10 °C); A specified floor area, m This approach may only be used if values for QW , A,day are given in a national annex The national annex shall also indicate whether the specified floor area to be applied is the net area or gross area of the building The weekly, monthly or annual energy needs for domestic hot water are obtained by multiplying the energy needs per day by the appropriate number of days 5.5 Tabulated energy needs for domestic hot water This method is characterised by the assumption that the energy needs for domestic hot water is related to the building type and use The energy needs for domestic hot water on a daily basis can be tabulated against a single parameter or multiple parameters depending on: type of building; type of activity carried out within the building; use of a zone within a building, where more than one activity is carried out; standards or class of activity, such as the category of a hotel (number of stars) or the class of catering establishment The table should be provided in a national annex The weekly, monthly or annual energy needs for domestic hot water are obtained by multiplying the energy needs per day by the appropriate number of days 12 BS EN 15316-3-1:2007 EN 15316-3-1:2007 (E) Annex A (informative) Tapping programs for single family dwellings NOTE These tables are reproduced from EN 13203-2 Tapping program No is representative of an average European use Table A.1 — Tapping program No (average daily tapping pattern for a single person, 36 litres at 60° C) Minimum ∆θ (for start of counting useful energy) °C °C Energy hh/mm kWh 07.00 0,105 small 15 07.30 0,105 small 15 08.30 0,105 small 15 09.30 0,105 small 15 11.30 0,105 small 15 11.45 0,105 small 15 12.45 0,315 dishwashing 18.00 0,105 small 15 18.15 0,105 household cleaning 30 10 20.30 0,420 dishwashing 11 21.30 0,525 large No Total Type of tapping ∆θ desired (to be achieved during tapping) Start, time of the day 45 45 0 30 2,100 Equivalent hot water volume at 60 °C 36 litres 13 BS EN 15316-3-1:2007 EN 15316-3-1:2007 (E) Table A.2 — Tapping program No (representative of an average European use) (average daily tapping pattern for a family with shower use, 100 litres at 60° C) °C °C hh/mm kWh 07.00 0,105 small 15 07.15 1,400 shower 30 07.30 0,105 small 15 08.01 0,105 small 15 08.15 0,105 small 15 08.30 0,105 small 15 08.45 0,105 small 15 09.00 0,105 small 15 09.30 0,105 small 15 10 10.30 0,105 floor cleaning 11 11.30 0,105 small 15 12 11.45 0,105 small 15 13 12.45 0,315 dishwashing 14 14.30 0,105 small 15 15 15.30 0,105 small 15 16 16.30 0,105 small 15 17 18.00 0,105 small 15 18 18.15 0,105 household cleaning 30 19 18.30 0,105 household cleaning 30 20 19.00 0,105 small 15 21 20.30 0,735 dishwashing 22 21.15 0,105 small 15 23 21.30 1,400 shower 30 Total 5,845 Equivalent hot water volume at 60 °C 14 Minimum ∆θ (for start of counting useful energy) Energy No Type of tapping ∆θ desired (to be achieved during tapping) Start, time of the day 100,2 litres 30 45 45 0 BS EN 15316-3-1:2007 EN 15316-3-1:2007 (E) Table A.3 — Tapping program No (average daily tapping pattern for a family of persons with bath and shower use, 200 litres at 60° C Minimum ∆θ (for start of counting useful energy) °C °C Energy hh/mm kWh 07.00 0,105 small 15 07.05 1,400 shower 30 07.30 0,105 small 15 07.45 0,105 small 15 08.05 3,605 bath 08.25 0,105 small 15 08.30 0,105 small 15 08.45 0,105 small 15 09.00 0,105 small 15 10 09.30 0,105 small 15 11 10.30 0,105 floor cleaning 12 11.30 0,105 small 15 13 11.45 0,105 small 15 14 12.45 0,315 dishwashing 15 14.30 0,105 small 15 16 15.30 0,105 small 15 17 16.30 0,105 small 15 18 18.00 0,105 small 15 19 18.15 0,105 household cleaning 30 20 18.30 0,105 household cleaning 30 21 19.00 0,105 small 15 22 20.30 0,735 dishwashing 45 23 21.00 3,605 bath 30 24 21.30 0,105 small No Total Type of tapping ∆θ desired (to be achieved during tapping) Start, time of the day 30 30 45 0 15 11,655 Equivalent hot water volume at 60 °C 199,8 litres 15 BS EN 15316-3-1:2007 EN 15316-3-1:2007 (E) Table A.4 — Tapping flow rates Type of tapping 16 Energy Hot water flow rates corresponding to a temperature rise of 45 K kWh l/min Household cleaning 0,105 + 0,5 Small 0,105 + 0,5 Floor cleaning 0,105 + 0,5 Dishwashing 0,315 + 0,5 Dishwashing 0,420 + 0,5 Dishwashing 0,735 + 0,5 Large (cycle no 1) 0,525 + 0,5 Shower 1,400 + 0,5 BS EN 15316-3-1:2007 EN 15316-3-1:2007 (E) Annex B (informative) Informative values for calculation of the energy needs for domestic hot water in buildings B.1 Tabulated values Informative values of VW , f ,day and factor f are given in Table B.1 These values are based on a domestic hot water delivery temperature of 60 °C and a cold water supply temperature of 13,5 °C Table B.1 — Values for calculation of domestic hot water requirements for buildings Type of activity VW , f ,day f l/unit/day unit See B.2 Floor area (m²) Accommodation 28 Number of beds Health establishment without accommodation 10 Number of beds Health establishment with accommodation − without laundry 56 Number of beds Health establishment with accommodation − with laundry 88 Number of beds Dwelling Education Offices Hot water requirements not taken into account Theatres and lecture theatres Shops Catering, meals per day Traditional cuisine 21 Number of guests per meal Catering, meals per day Self service Number of guests per meal Catering, meal per day Traditional cuisine 10 Number of guests per meal Catering, meal per day Self service Number of guests per meal 17 BS EN 15316-3-1:2007 EN 15316-3-1:2007 (E) Table B.1 — Values for calculation of domestic hot water requirements for buildings Type of activity VW , f ,day f l/unit/day unit Number of beds Hotel, 1-star, without laundry 56 Hotel, 1-star, with laundry 70 Hotel, 2-star, without laundry 76 Number of beds Hotel, 2-star, with laundry 90 Number of beds Hotel, 3-star, without laundry 97 Number of beds Hotel, 3-star, with laundry 111 Number of beds Hotel, 4-star and GC, without laundry 118 Number of beds Hotel, 4-star and GC, with laundry 132 Number of beds Sports establishment 101 Number of showers installed Storage Number of beds Hot water requirements taken into account not Industry Transport Other B.2 Default values for single family dwellings For single family dwellings, the value of VW , f ,day is calculated according to Equations (3) and (4) in 5.3.4.2 Default values for x , y , z , minimum level and threshold level are: x = 39,5 litres/day y = 90,2 litres/day z = 1,49 litres/m per day minimum level = 14 m threshold level = 27 m 18