scope:

Scope and objective

This guideline applies to rooms and buildings for which requirements must be met with respect to temperature, humidity, pollutant concentration, and ventilation, and which are equipped with an air-conditioning system serving these purposes. The calculation method presented in this guideline allows calculating the energy effort for heating, cooling, humidifying, de-humidifying, and ventilating. The guideline investigates the benefit transfer to the room. The pertinent system limits are defined in VDI 2067 Part 1 and identified in Figure 1 of this guideline for the specific case of HVAC systems. Accordingly, the calculation takes into account the room, the transport of air to the room, and the HVAC equipment in the central unit and in after-treatment units. Neither does the calculation take into account the generation and provision of the required heat and cold, and of current and water, nor the distribution of these media between their generation or provision and the unit to which they are supplied. The calculation method prerequisites a calculation of the energy demand of heated and air-conditioned buildings as per VDI 2067 Part 10. In addition to other indispensable data, this calculation yields input data for the calculation method according to this Part 21.

The calculated values of energy Aeffort serve the following purposes:

• assessment of the energetic quality of a system
• comparison of different systems in terms of energy
• more detailed calculation of the energy effort of a HVAC system taking into account distribution and energy generation

The calculated values are not suitable for the following purposes:

• comparison with measured consumptions of existing systems
• comparison with demands calculated in accordance with previous editions of VDI 2067
• comparison with simulations using arbitrary parameters