DESCRIPTION OF THE SESSION

Personalized Environmental Control System (PECS) with heating, cooling, ventilation, lighting, and acoustic management functions can provide localized environment control according to the user’s preference. Their implementation could reduce the conditioning need of the space (e.g. total volume), which would improve the energy efficiency of the entire heating, ventilation and air-conditioning (HVAC) system substantially. At the same time, PECS would improve personal comfort, health, and well-being. Personalized ventilation will protect against cross contamination, a critical issue in open-plan offices and work places with close distance. The application is for work places with mainly sedentary activity such as offices. As buildings will need to be pandemic-proofed and resilient in cases of extreme events (e.g. heatwaves), an increasing interest and market is expected for PECS.

IEA EBC Annex (Annex 87 – Energy and Indoor Environmental Quality Performance of Personalised Environmental Control Systems) has the overall objective to establish design criteria and operation guidelines for PECS and to quantify the benefits regarding health, comfort, energy, and cost performance. This includes also control concepts and guidelines for operating PECS in spaces with general ambient systems for heating, cooling, ventilation and lighting. The scope includes all types of PECS for local heating, cooling, ventilation, air cleaning, lighting and acoustic. It includes desktop systems (e.g. mounted on desks), systems integrated in furniture (e.g. chairs), and wearables (e.g. garments or devices attached to occupants’ body). The Annex consists of five subtasks:

• Fundamentals
• Applications and technologies
• Control, operation, and system integration
• IEQ and energy performance evaluation
• Policy and marketing actions.

The session will introduce Annex 87 and discuss aspects related to PECS operation and evaluation. Current indoor environmental quality (IEQ) and energy performance evaluation methods alongside used key performance indicators (KPIs) will be described. Examples of both traditional and advanced control strategies will be presented. A secondary objective of the session is to gather input from the conference audience on the aforementioned topics.

   OBJECTIVES OF THE SESSION

• Introduce IEA EBC Annex 87
• Discuss challenges of PECS operation
• Provide examples of automatic control strategies
• Describe current indoor environmental quality (IEQ) and energy performance evaluation methods for PECS
• Present key performance indicators (KPIs) for PECS IEQ and energy performance evaluation

   SESSION PROGRAMME

1. 1. Introduction to IEA EBC Annex 87,  Bjarne W. Olesen, International Centre for Indoor Environment and Energy, Technical University of Denmark, Denmark
   2. Indoor environmental quality (IEQ) and energy performance evaluation of PECS, Douaa Al-Assaad, Building Physics and Sustainable Design, KU Leuven, Belgium
   3. Physiological sensing for thermal comfort assessment, Dragos-Ioan Bogatu, International Centre for Indoor Environment and Energy, Technical University of Denmark, Denmark

  SESSION CHAIRS

1. 1. Bjarne W. Olesen, International Centre for Indoor Environment and Energy, Technical University of Denmark, Denmark
   2. Dragos-Ioan Bogatu, International Centre for Indoor Environment and Energy, Technical University of Denmark, Denmark

    SESSION DURATION
– 60 minutes