Experimental facilities

Detailed numerical simulation and experimental validation of hermetic reciprocating compressors. Integration to single stage vapour compression refrigerating unit

Fig. 1: Hermetic reciprocating compressor scheme.
Fig. 2:. Commercial hermetic compressor view.

Fig. 3: Hermetic reciprocating compressor thermocouples positions.
Fig. 4: Hermetic compressor instrumented opened.
Fig. 5: Thermocouples details in cylinder head and valve plate.
Fig. 6:. Thermocouples position at crankcase and shell.


Detailed numerical simulation and experimental validation of hermetic reciprocating compressors. Integration to single stage vapour compression refrigerating unit.

Fig. 1: Single stage vapour compression refrigerating unit scheme
Fig. 2:. Single stage vapour compression refrigerating unit pictures.


Simulation of absorption refrigeration systems and water falling film absorption processes.
Design of a low capacity air-cooled absorption chiller.

Fig. 1:. Scheme of the air-cooled absorber test rig
Fig. 2: Front view of the test rig
Fig. 3: Lateral view of the test rig


Test bank for low and medium temperature collectors

Fig. 1: Scheme of the thermal oil collector test bank with Working temperatures up to 250ºC. Both the mass flow rate and the collector inlet temperature are computer controlled. The basic elements of the circuit are a circulation pump, a circulation heater, the solar collector and an oil-air heat exchanger. After passing through the pump and the flow meter, the fluid is heated up to the desired inlet temperature.
Fig. 2:. View of the pressurised water collector test bank. Working temperatures up to 150 oC. Measurements of a single collector, comparative measurements of two collectors and measurement of collectors arrays with an absorber area up to 10 m2 can be carried out.


Solar cell for the testing of solar thermal system and equipment.
Solar collectors and multifunctional ventilated facades.

Fig. 1: View of the solar cell of the CTTC. The solar cell consists on: two collector test banks (for temperatures up to 250 oC), a south orientated modular wall for the testing of facades (passive solar systems) and a collector tracker.
Fig. 2: Stagnation proof transparent insulation flat plate solar collectors for medium temperature applications. Collectors optimised, designed, constructed and tested at the CTTC in the frame of a CRAFT-JOULE project (STATIC).


Analysis of fin-and-tube exchangers. Applications to refrigeration, air conditioning and automobile industries

Fig. 1: Diagram of the environmental chamber for heat exchanger testing.

Fig. 2: Diagram of the liquid overfeed ammonia refrigeration circuit.

Fig. 3: Water-glycol circuit for the single-phase experiments.

Fig. 4: Enviromental chamber external view.
Fig. 6:. Heat exchanger prototype mounting inside
environmental chamber
Fig. 5: Liquid overfeed refrigeration test facility.


Hot Wire Anemometry measurements. Application to air curtains and domestic refrigerators.

Fig. 1: Refrigerator velocity measurements by means of Hot Wire Anemometry.
Fig. 2: Hot Wire Anemometry positioning by means of a high precision 2D Cartesian robot.
Fig. 3: Scheme of the set-up for Air Curtains efficiency rating according to the AMCA standards
Fig. 4: Calibration of the probes in the laboratory.
Fig. 5: Probes signal and post-processing