1 Scope
This European Standard describes a method to calculate the power and the storage volume
required for the dimensioning of domestic hot water systems (DHW). The applicability ranges from direct water heaters (no storage volume and a comparatively
large effective heating power) to larger storage systems with a comparatively small
heating power and large storage volumes.
This European Standard is applicable to the following water storage systems:
-
— storage systems characterized by a minimal mixing zone, (such as stratified charging storage tanks or storage tanks with external heat exchangers): these systems are nominated in this standard as “charging storage systems”;
-
— storage tank water heaters and warm water storage tanks with a pronounced mixing zone (such as DHW storage tanks with internal heat exchangers), nominated in this standard as “mixed storage systems”;
and for different uses.
The Scope also includes standardization methods for determining the energy need for
domestic hot water. This European Standard covers the domestic hot water needs in buildings.
The calculation of the energy needs for DHW-Systems applies to residential and non-residential buildings, a building or a zone
of a building.
Figure 1 shows the relative position of this standard within the set of EPB standards in the
context of the modular structure as set out in EN ISO 52000‑1.
NOTE 1 In CEN ISO/TR 52000‑2 the same table can be found, with, for each module, the numbers of the relevant EPB standards and accompanying technical reports that are published or in preparation.
NOTE 2 The modules represent EPB standards, although one EPB standard may cover more than one module and one module may be covered by more than one EPB standard, for instance a simplified and a detailed method respectively. See also Clause 2 and Tables A.1 and B.1.
Table 1 shows the relative position of this standard within the EPB package of standards.
Table 1
—
Position of this standard, within the modular structure of the set of EPB standards
| Overarching |
Building
(as such) |
Technical Building Systems | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sub module | Descriptions | Descriptions | Descriptions | Heating | Cooling | Ventilation | Humidification | Dehumidification | Domestic Hot water | Lighting | Building automation and control | Electricity production | ||
| sub1 | M1 | M2 | M3 | M4 | M5 | M6 | M7 | M8 | M9 | M10 | M11 | |||
| 1 | General | General | General | 15316–1 | 15316–1 | |||||||||
| 2 | Common terms and definitions; symbols, units and subscripts |
Building Energy Needs | Needs | 12831–3 | ||||||||||
| 3 | Applications | (Free) Indoor Conditions without Systems | Maximum Load and Power | 12831–1 | 12831–3 | |||||||||
| 4 | Ways to Express Energy Performance |
Ways to Express Energy Performance | Ways to Express Energy Performance | 15316–1 | 15316–1 | |||||||||
| 5 | Building categories and Building Boundaries | Heat Transfer by Transmission | Emission and control | 15316–2 | 15316–2 | |||||||||
| 6 | Building Occupancy and Operating Conditions | Heat Transfer by Infiltration and Ventilation | Distribution and control | 15316–3 | 15316–3 | 15316–3 | ||||||||
| 7 | Aggregation of Energy Services and Energy Carriers | Internal Heat Gains |
Storage and control | 15316–5 | 15316–5 15316–4–3 | |||||||||
| 8 | Building zoning | Solar Heat Gains |
Generation | |||||||||||
| 8–1 | Combustion boilers | 15316–4–1 | 15316–4–1 | |||||||||||
| 8–2 | Heat pumps | 15316–4–2 | 15316–4–2 | 15316–4–2 | ||||||||||
| 8–3 | Thermal solar
Photovoltaics
|
15316–4–3 | 15316–4–3 | 15316–4–3 | ||||||||||
| 8–4 | On-site cogeneration | 15316–4–4 | 15316–4–4 | 15316–4–4 | ||||||||||
| 8–5 | District heating and cooling | 15316–4–5 | 15316–4–5 | 15316–4–5 | ||||||||||
| 8–6 | Direct electrical heater | 15316–4–8 | 15316–4–8 | |||||||||||
| 8–7 | Wind turbines | 15316–4–10 | ||||||||||||
| 8–8 | Radiant heating, stoves | 15316–4–8 | ||||||||||||
| 9 | Calculated Energy Performance | Building Dynamics (thermal mass) | Load dispatching and operating conditions | |||||||||||
| 10 | Measured Energy Performance |
Measured Energy Performance | Measured Energy Performance | 15378–3 | 15378–3 | |||||||||
| 11 | Inspection | Inspection | Inspection | 15378–1 | 15378–1 | |||||||||
| 12 | Ways to Express Indoor Comfort | – | BMS | |||||||||||
| 13 | External Environment Conditions | |||||||||||||
| 14 | Economic Calculation | 15459–1 | ||||||||||||
NOTE The shaded modules are not applicable.