DIN V 18599-2-2007 建筑物能效.计算加热、冷却、通风、家用热水和照明用净能、最终和初始能量.第2部分:建筑物区域加热和制冷的净能量要求
Energy efficiency of buildings - Calculation of the net, final and primary energy demand for heating, cooling, ventilation, domestic hot water and lighting - Part 2: Net energy demand for heating and cooling of building zones
The DIN V 18599 series of prestandards provides a methodology for calculating the overall energy balance of
buildings. The described algorithm is applicable to the calculation of energy balances for:
-- residential buildings and non-residential buildings;
-- planned or new building construction and existing buildings.
The procedure for calculating the balances is suitable for:
-- balancing the energy use of buildings with partially pre-determined boundary conditions;
balancing the energy use of buildings with freely-selectable boundary conditions from the general
engineering aspect, e.g. with the objective of achieving a good comparison between calculated and
measured energy ratings.
The balance calculations take into account the energy use for:
-- heating,
-- ventilation,
-- air conditioning (including cooling and humidification),
-- heating the domestic hot water supply, and
-- lighting
of buildings, including the additional electric power input (auxiliary energy) which is directly related to the
energy supply.
This document specifies methods of calculating the energy needs for heating and cooling of the section of the
building being assessed. The calculations are based on a specific zone of the building defined according to its
intended use. The method of defining building zones is described in DIN V 18599-1. DIN V 18599-10 specifies
boundary conditions with respect to room temperature, internal loads, lighting and air change requirements
relating to the different type of room usage.
The procedures described in this standard are suitable for calculating the energy need for heating of building
zones which have only heating, as well as the energy needs for heating and cooling of building zones which
are served by both heating and cooling systems. Particular attention is paid to determining the energy needs
for heating and cooling of building zones equipped with ventilation and air conditioning systems. Methods to
determine the total energy needs for heating and cooling of buildings with ventilation and air conditioning
systems are described in DIN V 18599-3, which specifies the heat, cooling energy, steam and electrical
energy required for operating fans for air handling and transport.
To calculate the energy needs for heating and cooling, all heat sources and sinks within the building zone
shall be determined and included in the balance calculations. These calculations shall also include the results
of other calculations described in other parts of the DIN V 18599 series of prestandards (e.g. energy gains
due to artificial lighting as described in DIN V 18599-4, uncontrolled heat gains due to the heating system as
described in DIN V 18599-5, etc.).
Energy needs for heating and cooling are the result of interaction between the technical characteristics of the
building and the building's technical installations and equipment and of the requirements arising from the type
of usage. Potential energy savings which may be achieved by modifications to the building can be estimated
by determining the energy needs for heating and cooling.
The energy needed for heating and, where applicable, for cooling the building zone shall be provided by
heating and cooling systems. The energy used by the heating and cooling systems for supplying energy to the
zone being evaluated is determined in DIN V 18599-5 to DIN V 18599-9. The values of energy need
calculated according to this document are the basis for calculating the energy use of the heating and cooling
systems.
This method is not suitable for calculating the energy needs for heating or cooling of building zones with
double glass facades. As long as no generally approved method of calculating energy characteristics of
double glass facades is known, all facades of this type which are subdivided into individual storeys can be
included in the calculations by being treated as sunspaces (unheated glazed annexes).