BINARY REFRIGERATION EQUIPMENT

KTE-5000LT

Equipment Introduction

Binary refrigeration system experiment due to two type of refrigerant
Operation characteristic experiment by 2-stage side refrigerant type (R-404a, R-23)
Drawing Pressure-Enthalpy diagram with excel file data by using refrigeration utilities
Operating test about variation of evaporating pressure by using the evaporator
DAQ program supply tools with that temperature, pressure, enthalpy, amount of the exchanged heat in each position can be measured in real time, and then saved by Microsoft Excel, so that saved data can be show and analysis by graph

Equipment Characteristics

High temperature cycle :
- Compressor 1 → Condenser → Filter Dryer → Sight Glass → Solenoid Valve 1 → Manual Expansion Valve 1 → Cascade Evaporator → Compressor 1
Low temperature cycle :
- Compressor 2 → Cascade Condenser → Filter Dryer → Sight Glass → Solenoid Valve 2 → Manual Expansion Valve 2 → Evaporator → Compressor 2
Being practicable to operate on manual, thermal control or pump down with connecting by sequence or PLC control system
Function for specification of refrigerator performance automatic measuring & data acquisition and system monitoring program
Being practicable to measure temperature at each of compressor inlet and outlet, condenser inlet and outlet, expansion valve inlet and outlet, evaporator outlet, inside chamber and outside air using thermocouples of K-type
Measure of pressure : Being practicable to measure within the range of –1 ~ 35 bar at each of compressor inlet and outlet, condenser outlet, expansion valve inlet by pressure sensors which are installed
Experiment factors

- Refrigeration effect

- Compressor work

- Condensing effect

- Evaporating latent heat

- Amount of flash gas at expansion valve outlet

- Dry ratio and humidity at expansion valve outlet

- Coefficient of Performance

- Temperature and Pressure data which are measured

- Being saved on every minute until 1,440 min as excel file after click the “SAVE”

Education Contents

Measurement and Analysis a Binary refrigeration system using software
Performance measurement and analysis a Binary refrigeration system
Configuration manual sequence control circuit for Binary refrigeration system and operation
Operation manual control PLC programming for Binary refrigeration system and operation
Configuration temperature automatic control sequence circuit at No.1 cycle stage of Binary refrigeration system
Configuration temperature automatic control sequence circuit at No.2 cycle stage of Binary refrigeration system

Mechanical Refrigeration Device Component

Control Panel Device Component

Dual Pressure Switch

Structure of DA100 Program

Application of Data Acquisition Equipment

(1) Schematic diagram of system show temp., press., (in realtime.)

(2) p-h chart.

(3) Data table for temperature, pressure and enthalpy.

(4) Sort of Calculation value like as COP, cooling capacity and heating capacity.

(5) Start switch and capture button.

Main menu, It is for setting of software or hardware and initialization of resister information
It is for select flow chart of each refrigeration system
The temperature and pressure data text are shown
It is for select p-h diagram of each refrigeration system
Performance data (qe, Aw, qc, qf, qr, x, y, COP) automatical calculated are shown
It is for start, stop, save data and finish of program and observe running statues
It is for saving flow chart and p-h diagram

Condition
1. ) Evaporating temperature : -15℃
2. ) Condensing temperature : 30℃
3. ) Temperature at inlet of compressor: -15℃(Dry gas)
4. ) Temperature at inlet of expansion valve: -25℃(sub-cooling temp. 5℃)
Formula
1. ) Refrigeration ability (Qe) = ha ― he
2. ) Compressor work (W) = hb ― ha
3. ) Condensing load (Qc) = hb ― he = Qe + W
4. ) Coefficient of performance (COP) = Qe/W
5. ) Compression Ratio (Pr) = P2/P1
Comparing each Coefficient of performance as each refrigerant