IEA-BCS Annex 35: HybVent

6th Expert Meeting

Meeting Minutes

Den Haag, The Netherlands

May 14 – 17, 2001

Minutes of 6th Expert Meeting

Location and Time

HybVent Forum 01, May 14, 2001 at Aula Conference Centre, Delft University of Technology ( Delft, The Netherlands.

6th Annex 35 Expert Meeting, May 15-17, 2001 at Carlton Beach Hotel ( Den Haag/Scheveningen, The Netherlands.

Host

Willem de Gids, TNO ( ), Building and Construction Research ( ), Delft, The Netherlands.

Ad van der Aa, Cauberg-Huygen Consulting Engineers, Rotterdam, The Netherlands

Attendance

32 delegates from 14 countries; Australia, Belgium, Canada, Denmark, France, Finland, Germany, Greece, Hong Kong, Italy, Japan, Norway, Sweden, The Netherlands.

There was no representation from: United Kingdom and U.S.A.

Objectives of the 6th Expert meeting

  • Discussion and revision of 1st draft of “Principles of Hybrid Ventilation”, including CD-ROM and technical reports
  • Revise dissemination plan for subtasks, workgroups and pilot studies
  • Nomination of authors for additional technical reports
  • Update and information on Pilot Studies and measurement results.
  • Reports on progress in working groups and goals for the coming months
  • Exchange of information at “HybVent Forum”

Annex Participation

Firm commitment for annex participation by 10 countries: Australia, Canada, Denmark, France, Finland, Germany, Greece, Italy, Japan and The Netherlands.

Firm commitment is still pending in 5 countries: Belgium, Norway, Sweden, United Kingdom and U.S.A. (UK and USA have not participated in the last 2-3 meetings)

University of Hong Kong is associate participant of Annex 35.

6th Expert Meeting Results

The working phase of the project has started on August 1, 1998 and the 6th Expert meeting was the eighths meeting held. The previous meetings were:

Preparation Phase : Project Definition Workshop, Aalborg, Denmark, October 1997

Kick-Off Meeting, Rome, Italy, March 1998

Working Phase:1st Expert Meeting, Trondheim, Norway, October 1998

2nd Expert Meeting, Lyon, France, April 1999

3rd Expert Meeting, Sydney, Australia, October 1999

4th Expert Meeting, Athen, Greece, April 2000

5th Expert Meeting, Brussels, Belgium, October 2000

HybVent Forum ’01

The purpose of the Forum is to disseminate information and to get feedback on the work performed within the annex both internally among annex participants and externally among the international design community. At this expert meeting a full day was reserved for this purpose with attendance of about 100 participants from Dutch industry in addition to the annex participants. A total of 11 papers were presented (All presentations are available from the web-site). Additional copies of proceedings can be ordered from Ad van der Aa. (Cost: 15 Euro/copy)

Principles of Hybrid Ventilation

The 1st drafts of the booklet “Principles of Hybrid Ventilation” and the technical reports on the CD-ROM were discussed in a plenary session. Comments to the first draft and a revised outline can be seen in attachment 7. The 1st draft of chapter 3 Design was not available at the meeting. WdG, POT and ÅB will during a to-day meeting (25. and 26. July, 2001) develop the first draft and it will be distributed to participants by August 1, 2001. OA and YL will elaborate chapter 5 and a complete 1st draft will be circulated to authors by August 10, 2001, in time for authors to take the complete draft into consideration when preparing their 2nd draft.

The CD-ROM is an information source with a number of reports, papers etc. with detailed information about the research results from subtasks, workgroups and pilot studies. The updated outline of the contents can be seen in attachment 7. For all case studies the first (and for some 2nd draft) draft reports are available. However, only for a few of the technical reports 1st drafts are available.

The dissemination plan for workgroups was discussed and revised at the meeting and the result is included in the revised outline of content of CD-ROM. Different proposals for navigation structure was discussed (see meeting documents), however, in the end it was decided that the structure should follow the structure of the booklet. Peter Wouters presented different ideas to improve the usability of the CD-ROM and it was decided that OA presents a first draft of CD-ROM outline at the next meeting.

The budget for the final reports is still valid and most countries have paid their first contribution to the common publication fund. Payments are only pending from Greece, The Netherlands and United Kingdom, see state of account in attachment 7.

The time-schedule for the final report was revised.

Item

/

Deadline

Plans for outline of PHV and contents on CD / Oct 5, 2000
1. draft ready of PHV and technical reports / May 1, 2001
Plans revised / May 17, 2001
Complete 1st draft ready / August 1, 2001
Complete 1st draft circulated to all / August 10, 2001
2. draft ready of PHV and technical reports / September 14, 2001
2. draft of PHV and technical reports circulated to all / September 21, 2001
Final draft ready of PHV and technical reports / April 2002
ExCo review / May/June, 2002
Printing / July/August, 2002
Publication available / September 8, 2002

Progress in Subtasks A

The subtask has defined five workgroups, which form a common basis for defining requirements and evaluation criteria for control and ventilation strategies.

During the workgroup sessions the workgroups discussed the status of their work and planned their activities before the next meeting. They also discussed the dissemination plan and contribution to the “Principles of Hybrid Ventilation “ booklet. For more detailed information see attachment 5 and the planned content for booklet and CD-ROM in attachment 7.

A new workgroup, WG A5: Cost aspects of Hybrid Ventilation, was started at this meeting. Workgroup leader is Ad van der Aa from The Netherlands and Denmark, Finland, Italy, Norway and Sweden also participates in the work.

It was decided that a survey of tool characteristics and selection of tools that are useful for hybrid ventilation performance analysis should be included in the work of work group A4 and B2. These two workgroups should create a table of existing tools including their characteristics and usefulness.

Running work groups include:

Work Group A1: Characterisation of Ventilation and Control Strategies.

The work group characterise and evaluate relevant hybrid ventilation and control strategies.

Work Group A2: Equivalent Energy Performance Targets in Standards and Regulations

The work group makes a critical analysis of the approaches used in present standards (or standard proposals) focusing on energy performance of buildings and suggests improvements for stimulation of the use of hybrid ventilation concepts.

Work Group A3: Comfort Requirements and Energy Targets

The work group develops new comfort requirements and energy targets for hybrid ventilated buildings, and based on a critical analysis of existing requirements and targets how they apply to hybrid ventilated buildings.

Work Group A4: Application of Analysis Methods in Hybrid Ventilation Design Process

The work group develops a design procedure for hybrid ventilation including recommendations on which methods to be used in different stages of the design.

Work Group A5: Cost Aspects of Hybrid Ventilation

The aim of the work is to get an overview of the cost-benefits of hybrid ventilation systems. The first start shall be to collect data from the pilot studies about investment costs. Special interest is in the specific hybrid ventilation components and controls. On the site of the benefits the focus shall be on energy savings and the pay back period. If available also data from maintenance and operating costs will be collected. To have a good comparison between the several countries data will be collected about reference costs.

Progress in Subtasks B

The participants in Subtask B develop analysis methods of different levels of detail from simple “easy to use” design methods to more detailed simulation methods which require a large effort. A better understanding of the physics of hybrid ventilation is necessary for the development of these methods and a number of elements in the air flow process is therefore looked at by different working groups.

During the work group sessions the workgroups discussed the status of their work and planned their activities before the next meeting. They also discussed the dissemination plan and contribution to the “Principles of Hybrid Ventilation “ booklet. For more detailed information see attachment 6 and the planned content for booklet and CD-ROM in attachment 7.

Running work groups include:

Work Group B1: Incorporate thermal Stratification Effects in Analysis Methods

The work group studies the effects of thermal stratification on natural ventilation and develops effective algorithms for incorporating thermal stratification in analysis methods of hybrid ventilation.

Work Group B2: Methods for Vent Sizing

The work group focuses on easy-to-use design methods for vent sizing and how to accurately estimate the values of parameters needed.

Work Group B3+B8: Input Data Bank and Climate Data

The work group collects input data suitable for evaluation of developed analysis methods, focuses on the translation on climate data from meteorological stations to building sites and estimates climate data impact on accuracy of hybrid ventilation feasibility analysis.

Work Group B4: Development of Probabilistic Methods

The work group develops probabilistic analysis methods for hybrid ventilation that can predict the uncertainty and probability of critical incidents like unsatisfactory air flows, large energy consumption and poor IAQ.

Work Group B5: Wind Flows through Large Openings

The work group focuses on boundary conditions required to model airflow through large openings and in particularly to what extent the standard surface pressure coefficient can be used.

Work Group B7: Evaluation of Control Strategies using Simulation Tools

The work group develops algorithms for incorporating control strategies in network models of hybrid ventilation.

Progress in Subtasks C

In Subtask C 13 pilot study buildings are now offered for demonstration of hybrid ventilation performance in office and educational buildings and 1st drafts of pilot study reports are available for all. The pilot study reports can be downloaded from ftp://ftp.civil.auc.dk/pub/private/HybVent/pilotstudy/.

At this meeting 2nd drafts of pilot study reports were presented for four buildings - Bertolt Brecht Gymnasium, Palazzina I Guzzini, Fujita Technical Center, Tånga School. Jorma Heikkinen presented results from four Finnish buildings with hybrid ventilation. These are not pilot studies, but can provide interesting results to be used in the project.

Miscellaneous

Next meeting

A joint

Action list

Principles of Hybrid Ventilation

  • Provide common template for technical reports by August 1, 2001OA
  • Send 1st draft of chapter 3 to OA by August 1, 2001WdG, POT, ÅB
  • Send 1st draft of chapter 5 to OA by August 1, 2001OA, YL
  • Send 1st draft of chapter 6 to OA by August 1, 2001AA, PO
  • Distribute complete 1st draft to authors by August 10, 2001OA
  • Send 2nd draft of booklet chapters to OA by September 14, 2001Authors
  • Send 1st draft of technical reports to OA by September 14, 2001Authors
  • Distribute 2nd draft of sections for booklet to participants by September 21, 2001 OA
  • Send title and authors of technical reports to OA by May 31, 2001Authors
  • Presentation of 1st draft of CD-ROM contents and structure at the China meeting OA

Work Groups

  • Work Group Co-ordinators sends summary of meeting results (including action list and dissemination plan) to OA before May 31, 2001 WGC
  • Work Group actions in attachment 5 and 6All

Web-site

  • Send bibliographic information on published Annex 35 work to OA to be included in the record of publications by June 1, 2001 All
  • Send technical papers and/or working documents to be published on the Web to OA All

Miscellaneous

  • CO2-sensor report on web-site next weekOA
  • Send comments to CO2-sensor report to Ad van der Aa before June 30, 2001 All
  • Distribution of meeting minutes by June 12, 2001OA
  • Send comment to PHV to all next weekOA
  • Make local arrangements for 7th expert meeting in ChangshaFH
  • Send invitation and prepare program for 7th Expert meeting by June 12, 2001 OA
  • Send registration for 7th Expert Meeting by July 1, 2001All
  • Preliminary preparations for 8th Expert meeting in CanadaFH
  • Note future meetings All

Next Meetings

7th Expert Meeting

Where and When: Changsha, China, October 8-10, 2001

Host: Hunan University, Prof. Guoqiang Zhang.

8th Expert Meeting

Where and When: Montreal, Canada, May 13-17, 2002

Host: Concordia University, Fariborz Haghighat.

Closing Meeting

Where and When: Copenhagen, Denmark, September 8, 2002

Host: Danish Building Research Institute, Søren Aggerholm.

Conferences and Meetings

June 13-15, 200149th ECB ExCo MeetingFrance

September 15-18, 20018th World Congress CLIMA 2000Napoli, Italy

October 2-5, 2001IAQVEC 2001Changsha, China

October 8-10, 2001Annex 35 7th Expert MeetingChangsha, China

November 4-7, 2001IAQ 2001San Francisco, California, US

November 7-9, 200150th ECB ExCo MeetingPoland

November 7-9, 2001PLEA 2001Florianopolis, Brazil

May 13-17, 2002Annex 35 8th Expert MeetingCanada

June 12-14, 200251th ECB ExCo MeetingCanada

June 30- July 5, 2002Indoor Air 2002Monterey, California, US

September 8, 2002Annex 35 Closing MeetingCopenhagen, Denmark

September 8-11, 2002ROOMVENT 2002Copenhagen, Denmark

November 6-8, 200252th ECB ExCo MeetingItaly

Attachmhents

Attachment 1Program

Attachment 2Agenda

Attachment 3Meeting Attendees with addresses

Attachment 5Subtask A Work Groups, information and progress reports

Attachment 6Subtask B Work Groups, information and progress reports

Attachment 7Work Group Final Report

Attachment 8Subtask C Pilot Studies

Attachment 9List of technical reports, articles and papers

Aalborg, June 5, 2001

Per Heiselberg

Operating Agent, Annex 35

Programme

Monday / May 14, 2001
900 – 1035 / HybVent Forum: An Integral Solution for Ventilation, Health and Energy / AA, HC
1035 – 1100 / Morning break
1100 – 1230 / HybVent Forum cont’d / AA, HC
1230 – 1330 / Lunch
1330 – 1440 / HybVent Forum cont’d / AA, HC
1440 – 1510 / Afternoon break
1510 – 1700 / HybVent Forum cont’d / AA, HC
1700 – 1900 / HybVent Forum Banquet and Demonstrations / AA, HC
Tuesday / May 15, 2001
0830 – 0900 / Registration
0900 – 1030 / Session 1Agenda 1-2
Welcome and introduction to the 5th Expert Meeting, general business / OA
1030 – 1100 / Coffee break / Hotel
1100 – 1230 / Session 2Agenda 3-4
Presentation of 1st draft of “Principles og Hybrid Ventilation. Presentation echnical reports and of structure of CD-ROM / OA
1230 – 1400 / Lunch / Hotel
1400 – 1530 / Session 3Agenda 6
Presentation of Pilot Study Progress / MC
1530 – 1600 / Coffee Break / Hotel
1600 – 1730 / Session 4Agenda 5, 7.1 and 7.9
Ventilation and Control Strategies / SA, AD
Free evening
Wednesday / May 16, 2001
0800 – 0900 / Breakfast SessionAgenda 7.1
Workgroup meetings / Group Leaders
0900 - 1030 / Session 5Agenda 7.3 and 7.4
Workgroup meetings / Group Leaders
1030 - 1100 / Coffee break / Hotel
1100 - 1230 / Session 6Agenda 7.10, 7.6 and 7.5
Workgroup meetings / Group Leaders
1230 – 1400 / Lunch Session Agenda 7.9
Workgroup meetings / Group Leaders
1230 – 1400 / Lunch / Hotel
1400 – 1700 / Visit to Waterland School Building / AA
Evening: Social Dinner / WdG
Thursday / May 17, 2001
0830 - 1000 / Session 7Agenda 7.2, 7.7, 7.8
Workgroup meetings / Group Leaders
1000 - 1030 / Coffee break / Hotel
1030 - 1200 / Session 8Agenda 4 and 8
Summary of workgroup results and 1st draft of technical reports / OA, Group Leaders
1200 – 1300 / Lunch / Hotel
1300 – 1500 / Session 9Agenda 9 and 10
Summary of workgroup results and 1st draft of technical reports
Summary of meeting results, general business, conclusions, next meetings and next steps / OA
1500 - 1530 / Coffee break / Hotel
1530 / End of workshop

OA: Per Heiselberg, WdG: Willem de Gids, MC: Marco Citterio, AA: Ad van der Aa, HC: Hans Cauberg, SA: Søren Aggerholm, AD: Angelo Delsante

Agenda

  1. Welcome, Introduction.

1.1Additions to and approval of agenda.

1.2Approval of minutes of 5th Expert meeting.

1.3Meeting participants and their affiliations.

1.4Goals of this meeting.

2Update on Annex 35 confirmed participation, national contact persons, etc.

2.1Annex 35 participants

2.1National contact persons

2.2Work group affiliations

2.3New workgroups

3Presentation of 1st draft of Booklet and CD-ROM

4Presentation of 1st draft of technical reports

5Presentation and discussion on ventilation and control strategies as well as modelling of control strategies.

5Presentation of Pilot Study progress

5.1Wilkinson Office Building, Sydney,Australia (DR, AU)

5.2IVEG Office Building, Hoboken, Belgium (NH, B)

5.3PROBE Office Building, Limelette, Belgium (NH, B)

5.4B&O Headquarters, Struer, Denmark (OJH, DK)

5.5Bertolt Brecht Gymnasum, Germany (UM, D)

5.6Palazzina I Guzzini, Recanati, Italy (PP, I)

5.7The Liberty Tower, Meiji, Japan (TC, J)

5.8Tokyo Gas Earth Port, Tokyo, Japan (TC, J)

5.9Fujita Technical Center, Atsugi, Japan, (AH, J)

5.10Mediå School, Grong, Norway (POT, N)

5.11Jaer School, Oslo, Norway (PS, N)

5.12Tangå School, Falkenberg, Sweden (ÅB, S)

5.13Waterland School, Leidschenveen, The Netherlands (AA, NL)

6Workgroup sessions

6.1WG-A1 Characterisation of Ventilation and Control Strategies (SA, DK)

6.2WG-A2 Equivalent Energy Performance Targets in Standards and Regulations (PW, B)

6.3WG-A3 Comfort Requirements and Energy Targets (WdG, NL)

WG-A4 Application of Analysis Methods in Hybrid Ventilation Design Process (POT, N)

6.4WG-A5 Cost Aspects of Hybrid Ventilation (AA, NL)

6.5WG-B1 Incorporation of Thermal Stratification Effects in Network Modelling (YL, AU)

6.6WG-B2 Methods for Vent Sizing (WdG, NL)

6.7WG-B3 Input Data Bank (MO, UK), WG-B8 Climate Data (GVF, I)

6.8WG-B4 Development of Probabilistic Methods (HB, DK)

6.9WG-B5 Wind Flows through Large Openings (MS, S)

6.10WG-B7 Evaluation of Control Strategies(AD, AU)

6.11WG Outline of “Principles of Hybrid Ventilation” (PH, DK)

7Reports on progress in workgroups

8Future expert meetings

8.17th expert meeting in Changcha, China, October 8-10, 2001

8.28th expert meeting in Montreal, Canada, April 2002

8.3Annex closure in Copenhagen, Denmark, September 2002

9Summary of workshop results, action list, next steps, and conclusions.

Meeting Attendees with addresses

Søren Aggerholm (SA), Danish Building Research Institute, Denmark

Åke Blomsterberg (ÅB), J&W Consulting Engineers, Sweden

Henrik Brohus (HB), Aalborg University, Denmark

Tomoyuki Chikamoto (TC), Nikken Sekkei Ltd., Japan

Marco Citterio (MC), ENEA, Italy

Florence Cron (FC), LEPTAB, Pôle Sciences et Technologie, France

Willem de Gids (WG), TNO Building & Constr. Research, The Netherlands

Angelo Delsante (AD), CSIRO Building, Construction and Engineering, Australia

Mohamed El Mankibi (MEM), ENTPE / DGCB / LASH, France

Gérard Guarracino (GG), ENTPE-LASH, France

Fariborz Haghighat (FH), Concordia University, Canada

Nicolas Heijmans (NH), BBRI, Belgium

Jorma Heikkinen (JH), VTT Building and Transport, Finland

Per Heiselberg (PH), Indoor Environmental Engineering, Aalborg University, Denmark

Ole Juhl Hendriksen (OH), Esbensen Consulting Engineers, Denmark

Akinori Hosoi (AH), FUJITA Corp., Development and Research Division, Japan

Christian Inard (CI), LEPTAB, Pôle Sciences et Technologie, France

Yuguo Li (YL), The University of Hong Kong, China

Uwe Meinhold (UM), Dresden University of Technology, Germany

Pierre Michel (PM), ENTPE LASH, France

Shigeaki Narita (SN), FUJITA Corp., Development and Research Division, Japan

Konstantia Papakonstantinou (KP), University of Athens, Greece

Marco Perino (MP), DENER - Politecnico di Torino, Dept. di Energetica, Italy

Paolo Principi (PP), Università degli Studi di Ancona, Italy

Markus Rösler (MR), Dresden University of Technology, Germany

Elena Ruffini (ER), Dipartimento di Energetica, Università degli Studi di Ancona, Italy

Peter G. Schild (PS), Norwegian Building Research Institute (NBI), Norway

Per Olaf Tjelflaat (PT), NTNU, Norway

Ad van der Aa (AA), Cauberg-Huygen Consulting Engineers, The Netherlands

Åsa Wahlström (ÅW), Swedish National Testing and Research Institute, Sweden

Christian Wetzel (CW), Fraunhofer Institute for Building Physics, Germany

Peter Wouters (PW), BBRI, Belgian Building Research Institute, Belgium

Søren Aggerholm

Danish Building Research Institute

Dr. Neergaardsvej 15

Postboks 119

DK-2970 Hørsholm

Denmark

Telephone: + 45 4586 5533; Fax: + 45 4586 7535; E-mail:

Åke Blomsterberg

J&W Consulting Engineers

Slagthuset

S-21120 Malmö

Sweden

Telephone: + 46 40 108 266; Fax: + 46 40 108 335; E-mail:

Henrik Brohus

Indoor Environmental Engineering