● Demonstrates the Operation of An Ammonia-Water Absorption Refrigerator
● Electrically Driven With Optional Computerised Data Acquisition.
● Allows Investigation of Refrigerator Performance Under Load.
● All Major Components Visible.
● Two year Warranty.
Introduction
The absorption refrigerator 816 is a fully operational ammonia-water refrigerator with all of the major refrigeration components visible.
The unit is robustly constructed entirely from standard commercial components. With the built in load and optional instrumentation students can investigate a refrigeration system that operates from an electrical heat source.
Originally invented by Albert Einstein and Leo Szilard the absorption refrigerator has no moving parts and utilises a mixture of ammonia-water and hydrogen. The cycle is complex and not easily understood without reference to an operating unit.
The unit has thermocouples located at 10 strategic and important locations around the refrigeration circuit. These together with a comprehensive system diagram and description in the manual, assist in student understanding of this complex system.
Description
Model 816 is one of a range of trainers designed to provide practical training in the fields of Refrigeration and Air Conditioning.
Each trainer has been carefully designed to provide instruction in specific topic areas that trainees are required to study as part of most Refrigeration and Air Conditioning courses.
On the model 816 all of the main absorption cycle components are visible at the rear of the unit. An instrumentation console with digital wattmeter and multi-way temperature indicator allow all of the important system parameters to be recorded. The system allows the ammonia generator and evaporator load to be independently varied and measured using the wattmeter.
An optional computerised Data Acquisition system 816A, allows all 10 thermocouples to be monitored as well as the ammonia generator power consumption and load current and voltage. This allows the system start condition to be monitored, which aids student understanding plus the system performance variation with change of load. All parameters can be monitored and plotted against time or transferred to a spreadsheet for analysis.
Specification
Detailed
The unit is mounted on a wheeled steel frame and incorporates:
Electrically driven ammonia-water absorption refrigeration system with insulated freezer compartment. All major components of the refrigeration system: generator, absorber, condenser and reservoir are visible
Variable electrical load inside the freezer compartment
Variable generator heater.
Instrumentation
Digital temperature indicator with 10 way selector.
Digital wattmeter to give instantaneous indication of generator heater input and evaporator load.
Optional Computerised Data Acquisition System.
The unit is also protected by double pole combined switches and circuit breakers and a residual current circuit breaker to protect against earth leakage.
Operating Manual
A comprehensive operating manual includes:
Notes on theory and principles
Detailed description of system circuit and operation.
Sample test results.
