COSTIC - Programme SOLHEATCOOL PROGRAMME SOLHEATCOOL STUDY AND DEVELOPMENT OF HEATING / COOLING SYSTEMS USING RENEWABLE ENERGY COSTIC - Comité Scientifique et Technique des Industries Climatiques - Eric MICHEL Enerbuild Participant number : 37

COSTIC - Programme SOLHEATCOOL PROJECT PARTNERS COSTIC Research centre - Technical co-ordinator JACQUES GIORDANO INDUSTRIES - France Manufacturer of solar collectors VELTA - Germany Manufacturer of heating / cooling floors ZAE BAYERN - Germany Manufacturer of absorption heat pump IMPAE / NOA - Greece Modelling of the system

COSTIC - Programme SOLHEATCOOL RESEARCH TOPIC TO DEVELOP A SOLAR HEATING / COOLING SYSTEM COMPOSED OF : Absorption heat pump Solar thermal collectors Heating / cooling floor

COSTIC - Programme SOLHEATCOOL RESEARCH TOPIC

COSTIC - Programme SOLHEATCOOL BACKGROUND Existing reversible systems : Conventional heat pump Gas absorption heat pump using LiBr / water with power over 100 kW Aim of the programme : To design a HCFC free heating cooling systems using renewable energies for small or medium buildings Type of buildings : Surface : about 300 m² Tertiary sector - little collective housing

COSTIC - Programme SOLHEATCOOL PROJECT OBJECTIVES To study the application of a floor system for cooling To study high performance solar thermal collectors To study a Lithium bromide / Water absorption heat pump To study the complete heating / cooling system

COSTIC - Programme SOLHEATCOOL STUDY OF THE HEATING / COOLING FLOOR SYSTEM Tests achieved in climatic cell Study of the influence of parameters on the heat exchange coefficient : Objective was to obtain heat exchange coefficient around 7 W/m².K Testing of a system : inertia - reaction of the control

COSTIC - Programme SOLHEATCOOL STUDY OF THE HEATING / COOLING FLOOR SYSTEM MEASURE OF THE HEAT EXCHANGE COEFFICIENT

COSTIC - Programme SOLHEATCOOL STUDY OF THE HEATING / COOLING FLOOR SYSTEM HEAT EXCHANGE REPARTITION 1,9 W / m² K 5,5 W / m² K

COSTIC - Programme SOLHEATCOOL STUDY OF CONTROL Measurement of the response to a pseudo step of supply water temperature Measurement of the response of a floor system to several scenarios Slow and mean increase of the external dew point Fast increase of the external dew point Fast increase of the load Cycle with internal inputs and solar load simulation Results Control must insure a fast reaction of water temperature to variation of the dew point in order to limit risks of condensation on the floor

COSTIC - Programme SOLHEATCOOL STUDY OF THE SOLAR COLLECTORS C8 prototypes CORTEC prototype Improvements brought to the collectors New selective coating to improve the efficiency New welding process : laser welding to allow an on line production

COSTIC - Programme SOLHEATCOOL STUDY OF THE SOLAR COLLECTORS C8 COLLECTORS

COSTIC - Programme SOLHEATCOOL STUDY OF THE SOLAR COLLECTORS CORTEC CORTEC with laser welding CORTEC Objective = 0,89 - 2,5  T/H

COSTIC - Programme SOLHEATCOOL Description of the tests (1) Measurement of the efficiency of the heat pump according to several parameters: –Temperature of the water from the collectors; –Temperature of the water from the cooling floor; –Temperature of the water from the cooling tower. Testing of the prototype in real conditions coupled with cooling floor and solar collectors. STUDY OF THE ABSORPTION HEAT PUMP

COSTIC - Programme SOLHEATCOOL Description of the tests (2) Return from cooling tower temperature Return from solar collectors temperature Chilled water temperature STUDY OF THE ABSORPTION HEAT PUMP

COSTIC - Programme SOLHEATCOOL Test facilities (1) STUDY OF THE ABSORPTION HEAT PUMP

COSTIC - Programme SOLHEATCOOL Test facilities (2) STUDY OF THE ABSORPTION HEAT PUMP

COSTIC - Programme SOLHEATCOOL STUDY OF THE ABSORPTION HEAT PUMP Tboiler inlet = 94,4 °C Tboiler outlet = 87,3 °C Cooling floor Absorption heat pump 10,1 kW7,1 kW 17,9 kW Cooling tower Tevaporator inlet = 20,7 °C Tevaporator outlet = 17 °C Tcondenser inlet = 29,3 °C Tcondenser outlet = 35,4 °C COP = 0,7  T = 7,1 K  T = 6,1 K  T = 3,7 K First results of tests in laboratory Boiler

COSTIC - Programme SOLHEATCOOL CONCLUSION (1) Study of the heating / cooling floor system Measurement of the heat exchange coefficient Sizing of the whole system Study of the working of the control Objectives reached Study of the solar collectors Measurement of the performances of some prototypes Objectives reached Study of the AHP (on going) Measurement of the performance according to several parameters (boiler temperature, evaporator temperature, cooling tower temperature) : first results showed a good working of the AHP. The COP reaches 0.7.

COSTIC - Programme SOLHEATCOOL CONCLUSION (2) Study of the whole system Connection of the different part of the system and measurement of the performances Modelling Modelling of the working and preparation of a handbook and a data basis of the results of the modelling End of the programme : September 2001