ISO/TC 205/WG 9 - Heating and cooling systems

This document specifies the energy performance calculation of water-based distribution systems for space heating, space cooling and domestic hot water (DHW). This document is applicable to the heat flux from the distributed water to the space and the auxiliary energy of the related pumps. The heat flux and the auxiliary energy for pumps can be calculated for any time interval (hour, month and year). The input and output data are mean values of the time interval. Instead of calculating the energy performance of water-based distribution systems, it is also possible to use measurements as long as they follow the time intervals of the whole performance calculation or can be divided into those time intervals.

This document establishes the required inputs, outputs and links (structure) of the calculation method for heating and cooling space emission systems. This document is applicable to the energy performance calculation of heating systems and water-based cooling space emission sub-systems.

ISO 13612 is applicable to heat pumps for space heating and cooling, heat pump water heaters (HPWH), and heat pumps with combined space heating and/or cooling and domestic hot water production, in alternate or simultaneous operation, where the same heat pump is used for space heating and domestic hot water heating. ISO 13612-2:2014 provides a calculation method under steady conditions that corresponds to one calculation step. The results of this calculation are incorporated in larger building models and take into account the influence of the external conditions and building control that influence the energy requirements for heating and cooling supplied by the heat pump system. ISO 13612-2:2014 specifies the required inputs, calculation methods, and required outputs for output thermal power generation for space heating and cooling and domestic hot water production of the following heat pump systems, including control: 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.

ISO 13612 is applicable to heat pumps for space heating and cooling, heat pump water heaters (HPWH), and heat pumps with combined space heating and cooling and domestic hot water production, in alternate or simultaneous operation, where the same heat pump is used for space heating and cooling and domestic hot water heating. ISO 13612-1:2014 establishes the required inputs, calculation methods, and required outputs for heat generation for space heating and domestic hot water production and control of the following heat pump systems: electrically driven vapour compression cycle (VCC) heat pumps; combustion engine-driven VCC heat pumps; thermally-driven vapour absorption cycle (VAC) heat pumps. ISO 13612-1:2014 specifies the design and dimensioning criteria for the heating and cooling systems in buildings using heat pumps alone or in combination with other heat generators. These include the following: water?water; brine?water; refrigerant?water (direct expansion systems); air?air; air?water; combined; systems driven by electricity or gas. ISO 13612-1:2014 takes into account the heating requirements of attached systems (e.g. domestic hot water, process heat) in the design of heat supply, but does not cover the design of these systems. It covers only the aspects dealing with the heat pump, the interface with the heat distribution and emission system (e.g. buffering system), the control of the whole system, and the aspects dealing with the energy source of the system.

ISO 13675:2013 is the general standard on generation by combustion sub-systems (boilers) for oil, gas, coal and biomass burning. It specifies the required inputs, calculation method, and resulting outputs for space heating generation by combustion sub-systems (boilers) including control. ISO 13675:2013 is also intended for the case of generation for both domestic hot water production and space heating.