BS EN 15316-4-2:2008 Heating systems in buildings. Method for calculation of system energy requirements and system efficiencies. Space heating generation systems, heat pump systems
BS EN 15316 is part of a series of standards on the methods for calculation of system energy requirements and system efficiencies. The framework for the calculation is described in the general part BS EN 15316-1 Heating systems in buildings. Method for calculation of system energy requirements and system efficiencies.
The energy performance can be assessed by determining either the heat generation sub-system efficiencies or the heat generation sub-system losses due to the system configuration.
BS EN 15316-4-2 is the European standard that presents methods for calculation of the additional energy requirements of a heat generation sub-system in order to meet the distribution sub-system demand. The calculation is based on the performance characteristics of the products given in product standards and on other characteristics required to evaluate the performance of the products as included in the system. Product data, e.g. heating capacity or COP of the heat pump, shall be determined according to European test methods. If no European methods exist, national methods can be used.
This method can be used for the following applications:
- Judging compliance with regulations expressed in terms of energy targets
- Optimisation of the energy performance of a planned heat generation sub-system, by applying the method to several possible options
- Assessing the effect of possible energy conservation measures on an existing heat generation subsystem, by calculating of the energy use with and without the energy conservation measure.
Only the calculation method is normative. The user shall refer to other European Standards or to national documents for input data. Additional values necessary to complete the calculations are to be given in a national annex, if no national annex is available, default values are given in an informative annex where appropriate.
BS EN 15316-4-2 covers heat pumps for space heating, heat pump water heaters (HPWH) and heat pumps with combined space heating and domestic hot water production in alternate or simultaneous operation, where the same heat pump delivers the heat to cover the space heating and domestic hot water heat requirement.
The scope of this part is to standardize the:
- Required inputs
- Calculation methods
- Resulting outputs
for heat generation by the following heat pump systems, including control, for space heating and domestic hot water production:
- Electrically-driven vapour compression cycle (VCC) heat pumps
- Combustion engine-driven vapour compression cycle heat pumps
- Thermally-driven vapour absorption cycle (VAC) heat pumps
using combinations of heat source and heat distribution as listed in this standard.
Contents of BS EN 15316-4-2 include:
- Foreword
- Introduction
- Scope
- Normative references
- Terms, definitions, symbols and units
- Principle of the method
- Heat balance of generation subsystem
- Energy input needed to meet the heat requirements
- Auxiliary energy WHW,gen,aux
- Recoverable, recovered and unrecoverable heat losses
- Calculation periods
- Calculation by zones
- Heat pumps with combined space heating and domestic hot water production
- Generation subsystem calculation
- Simplified seasonal performance method based on system typology (system typology method)
- Principle of the system typology method
- Calculation procedure of the system typology method
- Detailed case specific seasonal performance method based on component efficiency (bin-method)
- Input data for the calculation with the bin method
- Calculation steps to be performed in the bin method
- Heat energy requirements for space heating and domestic hot water mode for the bins
- Heating capacity and COP at full load
- COP at part load operation
- Thermal losses through the generator envelope
- Calculation of back-up heater
- Running time of the heat pump
- Total thermal losses and recoverable thermal loss of the generation subsystem
- Calculation of total energy input
- Summary of output values
- Example of evaluation of meteorological data
- Default values of parameters for the case specific seasonal performance method
- Controller setting of flow temperature (heating characteristic curve)
- Temperature correction factor for domestic hot water storage loading
- Average water temperature of domestic hot water storages
- Generator envelope
- Generation subsystem auxiliaries
- Factor fcombi for simultaneous operation
- Temperature reduction factor linked to location
- Efficiency value of the electrical back-up heater for space heating or DHW operation
- Calculation method for source and sink temperature correction with fixed exergetic efficiency
- Calculation example
- System configuration
- Example for tabulated values of the system typology method as national annex for the Netherlands
- Heat pump seasonal performance
- Residential and non-residential buildings
- Heat pump installation efficiency and energy consumption
- Example values for parameters to accomplish the case specific heat pump calculation method (bin method)
- Example values for heating capacity and coefficient of performance for electrically driven heat pumps
- Heating capacity
- Gas engine-driven heat pumps
- Absorption heat pumps
- Heat pumps with domestic hot water production (DHW) - Heating capacity of domestic hot water heat pumps
- Bibliography