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REFRIGERATION CIRCUIT WITH VARIABLE LOAD

REFRIGERATION CIRCUIT WITH VARIABLE LOAD

Code: EML0153

REFRIGERATION CIRCUIT WITH VARIABLE LOAD.

Learning Objectives / Experiments

- design and components of a refrigeration system

  * compressor;   * condenser ;   * thermostatic expansion valve; 

 * evaporator;   * pressure switch

- representation of the thermodynamic cycle in the log p-h diagram

- determination of important characteristic variables

  * coefficient of performance;   * refrigeration capacity

  * compressor work

- operating behaviour under load

Specification

[1] investigation of a refrigeration circuit with water circuit as load

[2] refrigeration circuit with compressor, condenser with fan, thermostatic expansion valve and coaxial coil heat exchaELTr as evaporator

[3] water circuit with pump, tank with heater as cooling load at the evaporator

[4] heater with controller to adjust the tank temperature

[5] record of all relevant measured values and display directly at the location of measurement

[6] GUNT software for data acquisition via USB under Windows Vista or Windows 7

[7] refrigerant R134a, CFC-free

Technical Data

Compressor:- refrigeration capacity: approx. 380W at 5/40°C

Evaporator:- refrigerant volume: 0,4L

- water volume: 0,8L

Condenser:- transfer area: approx. 0,175m²

- fan power consumption: 2x 29W

Pump: - max. flow rate: 1,9m³/h

- max. head: 1,4m

Tank:- volume: approx. 4,5L

- heater: approx. 450W

Measuring raELTs

- pressure: 2x -1...15bar

- compressor power: 1x 0...750W

- temperature: 6x 0...100°C

- flow rate (water): 1x 0,05...1,8L/min

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