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Task 35

Task Background

In the IEA PVPS Task 7 Activity 2.5 "PV/T-systems" a comprehensive inventory of known manufacturers and projects was compiled and a short draft working document was set up describing the state of the art on the field. One objective of this activity was to evaluate these systems and to give guidance on the design of PV/Thermal systems for the built environment, but quickly it was clear that there was a strong need to liase with the expertise of the SHC-programme on evaluation of thermal systems, experience on materials, integration issues etc.

On a workshop chaired by Mr. Erik Lysen (NL) in September 1999, where the experts from the SHC and from PVPS got together, it was agreed to initiate a Joint Working Group between the two implementing agreement.

Joint Working Group - Kick-off meeting in Copenhagen, June 2000

Henrik Sørensen, Esbensen Consulting, DK, activity leader of IEA PVPS Task 7 activity 2.5 on PV/T-collectors was asked to initiate the Joint Working Group and organise the first meeting in Copenhagen in connection to the Eurosun2000 conference in June 2000.

Agenda for the meeting can be downloaded below:

Minutes from the meeting can be downloaded from the links below:

Objectives of the Joint Working Group

The basic activities listed for the Joint Working Group was:

  • Set up the necessary definitions and methodologies for evaluation of PV/T-systems, both re. thermal and electrical output and efficiency
  • Provide an overview of all activities going on nationally on the field of PV/T
  • Carry out technical and economical evaluations of existing systems and projects
  • Evaluate the potential for increased use of PV/T-systems in the IEA member countries
  • Identify the barriers of increased use of PV/T and possible ways to overcome these
  • Provide results directly addressed to designers, manufacturers and researchers involved in the design of PV/T systems.

Joint Working Group - Rapperswil, Switzerland, October 2000

The purpose of this meeting was to follow up on actions decided on the kick-off meeting in Copenhagen, to prioritise the suggested topics for the work plan, organise the work in specific actions and to identify possible action leaders. Invitation with agenda for the meeting can be downloaded below:

Work Plan & Documents from joint working group

Road Map:
A Road Map is set op in a format suited to describe the necessary development in short, medium and long term, in order to reach the final goal: market ready products with cost-effective performance. The major headings for each period are:

  • Long term (7-10 years):
    - Commercial PV/T systems to the end-user market
  • Medium term (3-7 years):
    - Develop and disseminate methods and design tools
    - Start market introduction of systems, which can compete with separate PV and thermal solar systems
  • Short term (0-3 years):
    - Provide road map for possible routes of development
    - Catalyse information exchange to create new developments
    - Definitions and test methos for performance rating
The first version of this Road map of the development of PV/Thermal Solar Systems was discussed at 2. meeting of Joint Working Group - Rapperswil, Switzerland, October 2000

The second version of the document has been edited based on the comments received at the meeting in Rapperswil, and can be downloaded from the link below: This draft document is the basis for the draft workplan of the group, see below. Comments and suggestions for improvement are very welcome - Please address your contribution to the authors Frederik Leenders and Henrik Sørensen.

Work Plan:
The work plan of the joint working group is basically a description of how to "navigate" in the road map described above. The workplan will list the specific tasks to be perfomed in order to register, analyse, learn and disseminate information about PV/T-systems. Whereas the Road Map identifies the route and the overall milestones, the Work Plan is more detailed and specific regarding the expected achievements of each activity. The primary headings in this work plan is listed below:
  • Establish R&D Network
  • Market Analysis
  • Investigation of construction materials
  • Test methodologies incl. performance rating
  • Design specifications
  • Design Tools
  • Market introduction projects
  • Demonstration projects
  • Dissemination activities
Each of the tasks above will be described regarding effort, methodology, outcome and dissemination. Furthermore it will be important to identify the activity leaders and secure sufficient funding carrying out the work.

Following Activities in the Joint Working Group
In connection with the semi-annual meetings of IEA PVPS Task 7 and participation in various workshops and seminars, informal meetings was arranged in order to co-ordinate the planning of the activities of the joint working group with the results of activity 2.5. The contents of the final report of the activity 2.5 has served as an important basis for the more detailed planning of the work in the Joint Working Group.

Efforts to Form a New IEA SHC Task in this Field
During 2002 it became clear that the work to be carried out had a level which would call for a full task to be realised. Due to the fact that the primary theoretical and monitoring part would have to be based on the expertise of the Solar Thermal community, a proposal for a new Task within IEA Solar Heating and Cooling Implementing Agreement was set up.

A draft Annex text was presented during the SHC Exco meeting in New Zealand, november 2003 and based on the decision at this meeting, a task definition workshop was held in Copenhagen 25.-26. February 2004. Aim of this meeting was to detail the working plan for the task based on recommendations from all interested countries and experts involved in the field of PV/Thermal Solar Systems. Based on the results and recommendations of this meeting a work programme was presented at the IEA SHC ExCo meeting in Finland 3.-5. April 2004 and the three year IEA SHC Task 35 on PV/Thermal Solar Systems was approved.

Literature and Background Material
In the below relevant litteratur and background material is available:

Swiss report on a-Si PV/Thermal systems by LESO-PB/EPFL, Lausanne; Enecolo AG, Mönchaltorf and Ernst Schweizer AG, Hedingen

Final report from IEA PVPS Task 7, activity 2.5 on PV/Thermal Solar Systems In case a confirmation menu appears during download just quit the menu and the files will be downloaded

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