Moisture recovery


Validated planning and design procedure for energy-efficient moisture recovery systems in centralised and decentralised ventilation and air-conditioning systems (HVAC systems)

Duration: 2,5 years

Start: 09/2017

End: 02/2020

Project partners: Forschungsvereinigung für Luft- und Trocknungstechnik (FLT) e.V.

Sponsor: BMWi - Bundesministerium für Wirtschaft und Technologie

  Moisture recovery Copyright: EBC

The use of moisture recovery processes in HVAC systems results in a high energy-saving potential with simultaneous improvement of the indoor air quality. There are currently no suitable programs in practice for the design and dimensioning of a moisture recovery system available, as the design for only one operating point is not useful in terms of application.

The aim of the project is to develop an energy-efficient design process for moisture recovery in HVAC systems of non-residential buildings, which maps the partial load range and takes into account the influence of internal moisture loads.

For this purpose, the moisture recovery for various systems is analysed in high temporal resolution using dynamic simulation models. Start-up and shutdown processes, load changes, as well as partial load operation can be examined in detail and the possible energy saving potentials can be determined. The dynamic simulation models are validated and optimized by means of metrological investigations. Finally, a simplified planning tool for the design of moisture recovery systems is developed from the knowledge gained.

In addition, the effects on thermal comfort and energy consumption due to moisture recovery, the benefits of moisture recovery depending on building and usage types, as well as the potential savings in different operating modes are analyzed.