Objective
Design and testing of a resorption system as unit with the working pair with ammonia-water to produce chilled water using district heating at very low supply temperatures (80 deg. C).
The project was started in April 1994 for phase I and the design of a unit with 500 kW was finalized end of 1994 for a first application in Berlin, but the detail planning for the integration into the existing supply and consumer system together with the realistic conditions on site shows that for a yearly operating time of less than 1000 h/a such an investment can not be justified from economical view. Other consumers of chilled water have similar conditions.
Another attempt was made for an application in a food processing plant where a yearly operating time of more than 5000 h/a seems to be possible and a cogeneration system with combustion motors should be installed. On the other hand, not chilled water but brine down to 0°C was intended to use at lower refrigeration demand. A modified design for a refrigeration demand of 250 kW was completed, but finally the overall investment of the entire food processing extension was changed and the refrigeration unit cancelled. Therefore this demonstration project was finalized with completion of phase I including the investigation of :
- the partial load and over load behaviour
- new inhibitors
- compact design within two pressure vessels.
A practical design is now available and a preferred application will not be for chilled water production but for brine cooling down to -5°C with warm water of supply temperatures below 90°C.
District heating systems operate in summertimes with remarkably reduced supply temperatures of about 80 deg. C under very low demand. A consumer of such heat of low quality is an interesting customer for power stations connected with district heating systems. Absorption systems of standard design are not suitable for such heat supply conditions, especially with high temperatures for heat rejection to the ambient during the summer season.
In such cases a resorption system with ammonia-water can operate under these extreme conditions. For components of such a system a lot of experiences in design and function is available, but there is a lack of demonstration for units of described application due to a missing demand in the past. A demonstration unit of about 500 kW refrigeration capacity should be designed, manufactured and tested under original operating conditions at a place where refrigeration demand exists and warm water out of a district heating system is available.
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Programme(s)
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Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Topic(s)
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Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Call for proposal
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Funding Scheme
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Coordinator
13507 Berlin
Germany
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.