DIN V 18599-8-2007 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8部分:家用热水系统净能和最终能量要求
Energy efficiency of buildings - Calculation of the net, final and primary energy demand for heating, cooling, ventilation, domestic hot water and lighting - Part 8: Net and final energy demand of domestic hot water systems
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 use 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 provides a method for calculations relating to the domestic hot water system of buildings.
This document describes the energy use of domestic hot water systems with their subsystems (control and
emission, distribution, storage and generation). For this purpose, both the thermal losses and the auxiliary
energy of the individual subsystems are determined and, provided these occur within the heated zone, are
made available for the ensuing calculations described in DIN V 18599-1 and DIN V 18599-2. Information is
given on the possible influence of space heating according to DIN V 18599-5. Other systems, (such as
ventilation of residential buildings (see DIN V 18599-6)) that can make demands on or supply certain
subsystems, can accordingly be taken into account and analysed, with DIN V 18599-1 acting as the link
between the Parts.
It is also possible to calculate the energy balances of several building zones in which there are several units to
be balanced.
Figure 2 shows the scope of the present document as a diagram. For the reader's orientation, all other parts
of the DIN 18599 series of prestandards contain an illustration similar to Figure 2 as shown here, and in which
the respective energy components dealt with are shown in colour.
The energy need values calculated using this procedure cannot be used to size individual components.
Systems not covered by this document shall be assessed by analogy with this document while taking account
of the physics specific to the individual systems.