SR2021 capacity control and faults in refrigeration systems
Learning Objectives / Experiments
- familiarisation with the key devices for changing the
refrigeration capacity
* thermostat
* capacity controller
* start-up controller
* evaporation pressure controller
* condensation pressure controller
- fault finding in refrigeration system components
- effect of refrigerant supercooling
- familiarisation with defrosting methods
* electric defrost heater
* hot gas defrosting
- representation of the thermodynamic cycle in the log p-h diagram
Specification
[1] investigation of a refrigeration system with refrigeration and
freezing chambers
[2] refrigeration circuit with compressor, condenser, capacity
controller, start-up controller, combined pressure switch and 2
evaporators in insulated chambers
[3] each chamber with solenoid valve, thermostat, thermostatic
expansion valve, fan and heat exchanger for refrigerant
supercooling
[4] refrigeration chamber with evaporation pressure controller
[5] freezing chamber with electric defrost heater and hot gas
defrosting
[6] separate or parallel operation of the chambers via solenoid
valves
[7] simulation of 12 faults
[8] touch panel PC for fault activation, data acquisition,
evaluation and representation in the log p-h diagram
[9] refrigerant R404a
Technical Data
Compressor
- refrigeration capacity: 2440W at -10/30°C
Condenser with fan
- volumetric air flow rate: 570m³/h
Evaporator transfer areas
- refrigeration chamber: 1,12m²
- freezing chamber: 1,88m²
Electric defrost heater: approx. 125W
Capacity controller: 0,2...6bar
Start-up controller: 0,2...6bar
Thermostat: 2x -25...15°C
Evaporation pressure controller: 0...5,5bar
Measuring ranges
- temperature: 6x -50...50°C; 5x 0...100°C
- pressure: 3x -1...12,5bar; 2x -1...24bar
- flow rate: 2x 1.5...22,5L/h
- compressor power consumption: 0...5kW
Dimensions and Weight
LxWxH: 2420x780x1900mm
Weight: approx. 280kg
Required for Operation
400V, 50Hz, 3 phases or 230V, 60Hz/CSA, 3 phases
Product Details and Warranty
We supply suitable spare pats according to experiment requirement,
our products take aluminum structure, A4 paper dimension aluminum
and plastic hanging box structure.
We supply 3 years warranty time.
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Package details: plastic film+ plastic foam + plywood box with
pallet, and for equipment dimension less than 1CBM, we supply
plastic film+ plastic foam+ fine carton.
Arrange delivery within 45 days upon receipt of payment.
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Company Information
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Certificate
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| No. | Feature Name | Details |
| 1 | Customer design | Yes |
| 2 | Warranty | 1 year, 2 years, 3 years or 5 years according to client
requirements |
| 3 | Package | Plastic film+ carton+ Fine plywood |
| 4 | Products standard | International didactic equipment standard |
| 5 | Application range | Educational equipment for university, college, vocational training
centers |
| 6 | Company philosophy | Supply best quality Chinese products to the worldwide schools. |
| 7 | Self owned brand | Shouldshine, SSEDU, JSS. |
| 8 | Production time | From 10 days to 60 days according to different items |
| No. | Feature Name | Details |
| 1 | Customer design | Yes |
| 2 | Warranty | 1 year, 2 years, 3 years or 5 years according to client
requirements |
| 3 | Package | Plastic film+ carton+ Fine plywood |
| 4 | Products standard | International didactic equipment standard |
| 5 | Application range | Educational equipment for university, college, vocational training
centers |
| 6 | Company philosophy | Supply best quality Chinese products to the worldwide schools. |
| 7 | Self owned brand | Shouldshine, SSEDU, JSS. |
| 8 | Production time | From 10 days to 60 days according to different items |
