IEA EBC Annex 85: 4th Online Workshop

September 16, 2021
Zoom meeting room

Report of IEA-EBC Annex 85 Online Workshop:
Indirect Evaporative Cooling

The first working phase IEA-EBC Annex 85 Online Workshop was held on September  16th, 2021 at Beijing, using ZOOM meeting room. The meeting was opened by Associate professor Xiaoyun Xie. The workshop aims to introduce the research plan and preliminary progress of each subtask, and exchange the academic achievements of each country. Four presentations were given by each subtask leader to introduce the work plan and status of preparation in next half year. Seven research presentation were given by participants. The project OA Xiaoyun Xie introduced the status of Annex 85 in this meeting.
Main Content
1. Welcome
2. Latest information for the whole Annex

Xiaoyun gives a presentation about the latest information of Annex 85, include the working schedule, the status of participating countries and introduced the actions in the next half year:
3. Presentation from new participants (Stefano De Antonellis, Italy)
Stefano gives a presentation aims to summarize the most relevant results of a multi-year experimental campaign about different types of indirect evaporative cooling systems(IECs)
4. Presentation from each subtask leader, for the work plan and preliminary progress (Alireza Afshari and Alessandro Maccarini , Kashif Nawaz, Xiaoyun Xie and Hasan Demir, Chadi Maalouf and Vincent Lemort)
The presentations from each subtask leader give the research plan of each subtask and the work plan and status of preparation in next half year.

  • 1) Alireza Afshari, Alessandro Maccarini
  • The subtask leader Alireza Afshari gave an overview research plan of subtask A, and introduced the collection of the data of real project. In subtask A, and asked for the participants who will participate on the writing of the article integration of IEC in applications.
  • 2) Kashif Nawaz
  • The subtask leader Kashif Nawaz gave the research plan of subtask B, introduced the contact with manufactures and stakeholders engagement. Participants discussed about the focus of the case studies.
  • 3) Xiaoyun Xie and Hasan Demir,
  • The subtask leader introduced the main research content and the road map of cooperation research on subtask C, include thermal analysis basis and simulation analysis. The presentation also showed the first half year research focus, and the updated participants.
  • 4) Chadi Maalouf and Vincent Lemort
  • The subtask leaders introduced Actions completed/in progress since last meeting, included the questionary result about participants experience and investigation of climate data. Reference building of Annex 80 was introduced.

5. Presentations and discussions from participants

  • a) Introduction to demonstration project utilizing evaporative cooling (IEC&DEC) and district heat for dehumidification in Denmark (Michal Zbigniew Pomianowski and Hicham Johra)
  • Give a case of official building using IDCS and introduce recent activities, researchers choose two similar area in one building, and the IDCS has better performance than conventional ventilation system.
  • b) Introduction of two demonstration projects using IEC technologies in China (Ce Zhao, Yang Jing and Zejin Chen)
  • The presentation introduced A demonstration project in Urumqi using IEC water chillers as a data center’s cold source is tested and introduced, and introduced the Performance of IEC system in Xinjiang Art Center under low load rate.
  • c) Climate data research in Belgium (Essam Elnagar)
  • The research on heat wave was given. Introduced the research result on impacts of climate change on the indoor environment and energy performance of buildings in Belgium during summer [OCCuPANt], and introduced the climate model used in the research.
  • d) Building Energy Simulation and comparison between conventional vapor compression and alternative IEC configurations for residential buildings (Omar Abdelaziz)
  • Introduce the research on a typical building simulation under different HVAC solutions and compare different process. And discussed the optimization of the most promising IEC configuration.
  • e) Simulation on IEC processes and systems starting from Stefano example (Jean Lebrun)
  • The presentation introduced the research which use Stefano’s example and the process in Belgium to build a model with ESS, and get the solution, and discussed about the optimization of the process of the IEC air cooler.
  • f) Literature survey on IEC technologies(Hasan Demir)
  • The main content of the literature survey included history and definition of IEC, Types of IEC products, and bibliometric view of IEC papers, use the result of web of science, and examine of IEC papers.
  • g) Research on Dew point IEC air coolers: simulation and performance analysis. (Tala Moussa, Chadi Maalouf, Amel Boudjabi)
  • The presentation gives an introduction of EPORASI project in France and Algeria, included the motivations, system description, mathematical models, SPARK modelling and simulation results, and ANSYS/FLUENT simulation results.


  • Introduced the research plan and preliminary progress of each subtask.
  • The work plan of next half year has been discussed.
  • Exchange the academic achievements of each country.

Follow up

  • Confirm the arrangement of next workshop and each subtask meeting.
  • Confirm the detail of the work of next half year.
  • Construction of the project website.
  • Confirm the arrangement of the in-person meeting.

Contact information

  • Xiaoyun Xie
  • Building Energy Research Center, Tsinghua University, Beijing, China


  • Yijie Liu
  • Building Energy Research Center, Tsinghua University, Beijing, China.
Contact: Xiaoyun Xie