Item.2 DL-ZLDR03 Refrigerator Training System (including software, computer, and UPS)
1．Equipment Overview
This device is a desktop model, with dimensions of approximately 1280 ( length) × 700 (width) × 1650 (height) .
It allows users to study and observe the various stages of the refrigeration cycle (such as coefficient of performance, superheating, and subcooling) through pressure-enthalpy diagrams and R-134a charts.
The refrigeration circuit includes high-pressure and low-pressure gauges, pressure switches, sight glasses, filters, dryers, thermostatic expansion valves (TEVs), etc.
Refrigerant: R134a or equivalent.
2．Technical parameters
1.）Power supply: Single-phase 220V±10%, 50Hz, 10A;
2.）Test bench body: movable bench body with four casters (two with brakes, two without brakes).
3. ) RFID power supply management system (the following items will be provided with relevant supporting documentation).
It uses high-frequency RFID, with an operating frequency of 13.56MHz, and can manage and control the power of the entire device by swiping a card via the RS485 RFID communication method. It will also have corresponding prompt sounds and LED indicator lights.
3．Additional Equipment Configuration
3.1 Branded Desktop Computer (Dell)
Processor: Minimum Intel Core i5, 10th generation, 12MB cache, frequency 2.5 GHz to 4.0 GHz
Motherboard: Intel platform
Memory: 8GB DDR4
Graphics card: Intel integrated graphics
Storage: 1TB SATA hard drive
Monitor: 21.5 -inch high-definition monitor with a minimum resolution of 1366×768; Interfaces: VGA × 1, HDMI × 1
Operating system: Free-DOS
Keyboard and mouse: A USB keyboard and USB mouse of the same brand must be provided.
3.2 Offline Uninterruptible Power Supply (UPS)
Type: Offline UPS
Capacity: Minimum 650VA
Full load backup time: minimum 10 minutes (supports 1 computer and 1 monitor)
4．Learning Objectives
(1) Learning to use pressure-enthalpy charts
(2) Determine superheat and supercooling
(3) Basic refrigeration cycle energy balance
(4) Determine the coefficient of performance (CoP)
(5) Determine the non-isotropic, isotropic, and volumetric efficiencies during the compression phase.
(6) The effect of heat source and heat sink temperature on COP.
(7) Compare the performance of the actual cycle and the inverse Carnot cycle.
