ISO 13612-2-2014 PDF

Full title and description

St ISO 13612-2-2014 — Heating and cooling systems in buildings — Method for calculation of the system performance and system design for heat pump systems — Part 2: Energy calculation. This part specifies calculation procedures, required inputs and outputs for steady-state energy calculation of heat pump systems used for space heating, space cooling and domestic hot water production, and for integration of those results into larger building energy models.

Abstract

ISO 13612-2:2014 provides a single-step (steady-state) calculation method to determine the energy performance and thermal output of a range of heat pump systems (electrically driven vapour compression, combustion-engine driven VCC, and thermally driven absorption systems). It covers heat pumps used for space heating, space cooling and heat-pump water heaters, and defines required inputs, calculation algorithms and expected outputs for use by designers and energy modellers.

General information

• Status: Published / Confirmed (reviewed and confirmed in 2024).
• Publication date: May 2014 (Edition 1, 2014-05).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 27.080 (Heat pumps); 91.040.01 (Buildings in general).
• Edition / version: Edition 1 (2014).
• Number of pages: 116 pages.

These bibliographic and status details are taken from the ISO bibliographic record for ISO 13612‑2:2014.

Scope

Applies to calculation of energy supplied and thermal output for heat pump systems serving buildings, including: space heating, space cooling and domestic hot water systems where the same heat pump is used for multiple functions (alternate or simultaneous operation). The standard defines the steady-state (one-step) calculation method, required input data (system and boundary conditions, controls and operating modes), the calculation algorithms for different heat pump technologies, and the form of the outputs so results can be incorporated into whole-building energy simulations and system design workflows.

Key topics and requirements

• Definition of applicable heat pump system types (electrically driven vapour-compression, combustion-engine driven VCC, thermally driven absorption systems).
• Required input data: system boundaries, heat source/sink characteristics, control strategies, operating modes and environmental conditions.
• Steady-state single-step calculation method for thermal output and energy consumption.
• Algorithms and formulae to compute output thermal power for space heating, space cooling and domestic hot water production under specified conditions.
• Specification of outputs and reporting formats so results can be integrated into building energy models and used for system design and performance assessment.
• Consideration of control behaviour and interaction between simultaneous functions (e.g., space heating plus domestic hot water) in energy accounting.

Typical use and users

Used by HVAC system designers, building energy modellers, manufacturers of heat pump equipment, testing laboratories and regulatory bodies to calculate system-level energy performance, to compare designs, to size systems for energy purposes, and to provide standardized output data for whole-building simulations and compliance demonstrations. Also used in research and development for validating component and system models.

Related standards

ISO 13612 is a multipart standard. The closely related Part 1 is ISO 13612-1:2014 (Design and dimensioning) which addresses design/dimensioning methods for heat pump systems; Part 2 is the energy calculation method described here. Users often apply ISO 13612 together with building energy standards and other ISO building/HVAC standards (for example national adaptations and complementary calculation standards).

Keywords

heat pump; energy calculation; heating; cooling; domestic hot water; HVAC; system performance; steady-state calculation; building energy modelling; system design.

FAQ

Q: What is this standard?

A: ISO 13612-2:2014 is the part of the ISO 13612 series that specifies a steady-state energy calculation method for heat pump systems serving buildings (space heating, cooling and domestic hot water).

Q: What does it cover?

A: It covers calculation procedures, required inputs and outputs, and algorithms for determining thermal output and energy consumption of various heat pump technologies under defined steady-state conditions so results can be used in whole-building energy models and system design.

Q: Who typically uses it?

A: HVAC designers, energy modellers, equipment manufacturers, test labs, researchers and regulatory bodies use the standard to produce consistent, comparable energy-performance results for heat pump systems.

Q: Is it current or superseded?

A: The ISO bibliographic record shows ISO 13612-2:2014 as published in May 2014 and confirmed on review (the ISO record indicates the standard was reviewed and confirmed in 2024), so this 2014 edition remains the current confirmed edition as of the latest ISO record. Users should check national adoption or amendments for any localized updates.

Q: Is it part of a series?

A: Yes. ISO 13612 is a multipart standard; Part 1 covers design and dimensioning (ISO 13612-1:2014) and Part 2 covers energy calculation (this document). Other national or regional implementations (e.g., EN or NF adoptions) may exist.

Q: What are the key keywords?

A: Heat pump, energy calculation, heating, cooling, domestic hot water, system performance, steady-state calculation, building energy modelling, HVAC.