Objective Objectives This project aims at developing the use of refrigerant mixtures and the ammonia-water cycle as substitutes for CFC working fluids, in buildings and in high temperature industrial applications. Heat-pumps for buildings will be developed for increased coefficient of performance and heat pump equipment suitable for heat recovery in industrial food production and drying processes will be investigated at temperatures between 40°C and 120° C. Technical Approach The ammonia-water cycle is of interest because it allows higher temperatures to be achieved than are possible using ammonia alone. Problems of water migration, lubrication and materials compatibility have to be addressed. Lorenz cycles used for their wide temperature glides will be studied. New heat exchangers will be developed for Lorenz Cycles. A major concern of the project is the properties of the working fluids and their mixtures: thermo-physical properties, flammability, chemical stability, miscibility with the lubricating oil. In order to identify methods of dynamically measuring actual refrigerant composition at key points in the cycle a "smart" control will be developed to adjust the mixture composition as to match the heat pump performance to the particular application. The safety aspects of flammable refrigerant mixtures and the implications of flammable mixtures appearing on a temporary basis at different places within the system will be investigated. Expected Achievements and Exploitation The outputs of the project will include: . Design of ammonia-water absorber and desorber units to suit large temperature glides. . Evaluation of lubricants, oil-water solubilities and influence of mixture properties on lubrication and stability of working fluids. . Methods to measure continuously ammonia-water concentrations. . Process integration aspects of heat pumps with large temperature glides. . Report on refrigerant mixture selection for operation between 40°C and 120°C, including the thermophysical and transport properties and chemical stability of the mixtures. . Experimental investigation of split evaporator system behaviour with different refrigerant mixtures (range 40-120°C). . Production and testing of smart controller for dynamically controlling mixture composition. . New heat-exchanger designs to achieve counter- or pseudo-counter-current operation. . Report on application of Lorenz cycle machines in a food processing plant and in buildings with experimental validation of performance on test facilities. Fields of science engineering and technologymechanical engineeringtribologylubrication Programme(s) FP4-NNE-JOULE C - Specific programme for research and technological development, including demonstration in the field of non-nuclear energy, 1994-1998 Topic(s) 0201 - RUE in buildings Call for proposal Data not available Funding Scheme CSC - Cost-sharing contracts Coordinator UNIVERSITY OF ULSTER Address Cromore road BT52 1SA Coleraine United Kingdom See on map EU contribution € 0,00 Participants (11) Sort alphabetically Sort by EU Contribution Expand all Collapse all Ausimont SpA - Gruppo Montedison Italy EU contribution € 0,00 Address Piazza donegani 5/6 15047 Alessanria - spinetta marengo See on map Calor Gas Northern Ireland Ltd United Kingdom EU contribution € 0,00 Address Airport road west sydenham BT3 9EE Belfast See on map Chalmers University of Technology AB Sweden EU contribution € 0,00 Address 10,kemivagen 412 96 Göteborg See on map Consiglio Nazionale delle Ricerche Italy EU contribution € 0,00 Address Corso stati uniti 4 35127 Padova - camin See on map Forschungszentrum für Kälte- und Umwelttechnik GmbH Germany EU contribution € 0,00 Address 5,rudower chaussee 12489 Berlin See on map Forschungszentrum für Kältetechnik und Wärmepumpen Germany EU contribution € 0,00 Address Dorotheen straße 1 30419 Hannover See on map Moy Park Ltd United Kingdom EU contribution € 0,00 Address 39 seagoe industrial estate BT63 5QE Craigavon See on map UNIVERSITA DEGLI STUDI DI PADOVA Italy EU contribution € 0,00 Address 1,via venezia 1 35131 Padova See on map Universidad de Las Palmas de Gran Canaria Spain EU contribution € 0,00 Address 33,obispo rabadan 35003 Las palmas de gran canaria See on map Università degli Studi di Ancona Italy EU contribution € 0,00 Address Via delle brecce bianche 60131 Ancona See on map York International Ltd United Kingdom EU contribution € 0,00 Address Gardiners lane south SS14 3HE Basildon See on map
