TWK - Test- und Weiterbildungszentrum Wärmepumpen und Kältetechnik GmbH
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TWK - Test- und Weiterbildungszentrum Wärmepumpen und Kältetechnik GmbH
Capacity testing facilities for components
Test chamber for cooling and a/c units and heat pumps
Possible researches:
air conditioning unit operation at environmental temperatures up to 60 °C
heat pump operation down to -20 °C
air conditioning of rail vehicles and buses
performance analysis in complete systems
cooling and dehumidification capacity
fresh and recirculating air can be conditioned separately
solar radiation simulation
dynamic measurements
energy efficiency
heating capacity
Fig. 1
Test chamber for cooling and a/c units and heatpumps
Fig. 2
Measuring station of the test chamber
Fig. 3
Evaporator for cooling of chamber’s inside
Fig. 4
Cooling unit of test chamber
Test bench for full automotive a/c systems
Possible researches:
measuring of full systems or single components of automotive a/c systems
measuring of cooling and heating capacity
in-frame measuring of evaporator and condenser
measuring of gas coolers
a/c and heat pump running, components for cycle reversion
performance balancing on the refrigerant and air side
electrical powered and belt-driven compressors
refrigerants: R134a, R1234yf, R744, …
continuous oil concentration measurements, oil retention
thermographic analysis of temperature distribution
Fig. 1
Test bench for automotive a/c systems
Fig. 2
Evaporator and condenser channel
Fig. 3
Air conditioning for condenser channel
Fig. 4
Measuring cabinet of one of our test benches
Long-term test bench for compressors and systems
Possible researches:
long-term durability measuring of compressors according to VDA or customer specific guidelines
construction in a conditionable soundproof cabin
environmental temperature of compressor controllable
performance analysis of electrical powered and belt-driven compressors
flexible choice of refrigerant
performance balancing on the refrigerant and air side
Fig. 1
Long-term test bench for compressors and systems
Fig. 2
Inside of long-term test bench
Fig. 3
Conditioning of compressor environment
Fig. 4
Measuring station and switchboards
Test bench for components of automotive a/c systems
Possible researches:
performance analysis of battery cooling units
valve examination (TXV, EXV)
performance analysis of internal heat exchangers (IHX)
measurement of pressure loss
refrigerant: R134a, R1234yf, …
adjustable oil concentration
Fig. 1
Test bench for automotive a/c components
Fig. 2
Measuring station of components test bench
Fig. 3
Calorimeter and cooling unit
Test benches for automotive refrigerant compressors
Possible researches:
belt-driven and electrical powered automotive compressors
evaluation of performance map
measurement of cooling capacity via calorimeters and refrigeration cycle
refrigerants: R134a, R1234yf, R513A, R404A, R410A, …
adjustable oil concentration
long-term durability measuring of compressors according to VDA or customer specific guidelines
adjustable environment of compressor
Fig. 1
Test bench 1 for automotive refrigerant
Fig. 2
Measuring station of compressor test bench
Fig. 3
Switchboard of test bench
Fig. 4
Test bench 2 for automotive refrigerant compressors
Test bench for components suitable for R744 (CO
2
)
Possible researches:
analysis of IHX, accumulators and combination of both
transmission capacity and degree of exchange of IHX
R744-chillers
plateau of filling amount
oil recirculation
separation efficiency
pressure loss
Fig. 1
Test bench for components suited for R744
Fig. 2
Measuring station and control panel of test bench
Calibration of oil flow measuring methods
Possible researches:
calibration of sensors for continuous oil flow measuring
sensors: sound velocity, density, refractive index
refrigerant: R134a, R1234yf, R410A, R744, R513A, …
oil varieties: PAG, POE, PAO
miscibility gap
Fig. 1
Calibration rig for measuring devices for oil circulation
Fig. 2
Oil concentration measuring via sound velocity sensors
Fig. 3
Sound velocity at various oil concentrations
Custom test benches
Possible researches:
pressure change examination
long-term durability test of pumps
validation of valves
thermal simulation test bench for control development
component examination under high and low environmental temperatures
performance analysis of battery cooling units and compact a/c units
pressure loss measurement of piping components
Fig. 1
Temperature chamber for component examination
Fig. 2
Environmental conditions simulation reaching from -40 °C up to 160 °C
Fig. 3
Thermal simulation test bench for control development
Fig. 3
Performance test bench for compact a/c units
Further information