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Products | Thermodynamics, Heating and Sanitary Systems | Refrigeration and Air Conditioning | ET 165

ET 165

Experimental Module Refrigeration System

Technical Description

The ET 165 facilitates fundamental experiments in the area of refrigeration engineering. The unit contains a closed refrigerant circuit with open compressor, a condenser with switchable fan and an evaporator in a refrigeration box with transparent door and an adjustable heat load. The compressor is powered by a V-belt using the drive unit HM 365. A pressure controller prevents unacceptable pressures through electromagnetic opening of a bypass valve. All temperatures, pressures, the speed of the compressor, the heat load and the refrigerant mass flow rate are recorded electronically, indicated on digital displays and transferred to a PC (not included). The software and the data acquisition card are part of the HM 365 unit.

Learning Objectives / Experiments

- Fundamental principles of refrigeration engineering
- Components of a refrigeration circuit
- Calculations in a refrigeration circuit:
   energy balance
   coefficient of performance
   compressor power
   refrigerating capacity
   compressor pressure ratio
   volumetric efficiency
- Plotting a p-h state diagram

Features

* Part of equipment series for the investigation of
engines and machines₁
* Refrigerating chamber with transparent door and
adjustable heat load₁
* PC data acquisition system

Available accessories

HM 365 -- Universal Drive and Brake Unit

Alternative products

ET 351 -- Refrigeration Cycle with Open Compressor
ET 426 -- Capacity Control Methods in Refrigeration
ET 428 -- Multiple Compressor Refrigeration Control

Specification

[1] Experimental module for refrigeration unit
[2] Driven by HM 365
[3] Open compressor, 2 cylinders, max. refrigerating capacity: 845W, stroke: 26mm, bore: 35mm
[4] Refrigerating chamber with transparent door and adjustable heat load
[5] Lamellar radiator as heat load, 500W
[6] Air-cooled evaporator
[7] Condenser with fan
[8] Electronic sensors with digital displays for measurement of pressure, temperature, flow rate
[9] PC data acquisition via HM 365, software under Windows XP
[10] CFC-free refrigerant R134a

Technical Data

Compressor speed: 480...975rpm
Evaporator

- cooling surface: 3.62m²

- refrigerating capacity at 3°C air temperature (chamber) / DT₁=13°C: 460W

- 2 fans

- power consumption: 12W

- speed: 2200rpm

- max. airflow rate: 125m³/h
Condenser

- heat exchanger surface: 2.5m²

- fan airflow rate: 570m³/h

Sensor measuring ranges

- speed: 0...1000rpm

- pressure: -1...15bar

- temperature: -20...80°C

- flow rate: 2...15g/s

- power: 0...600W

Dimensions and Weight

l x w x h : 1460 x 800 x 1830 mm
Weight : approx. 120 kg

Connections

230V, ~50Hz (supply via HM 365)

Scope of Delivery

1 experimental module

1 instruction manual

Order Details

061.16500 ET 165 Experimental Module
Refrigeration System