POLBAN Final Projects Prof AgusW

7/28/2019 POLBAN Final Projects Prof AgusW

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1. Basic Refrigeration Trainer and Program for System

Performance

In this project, the students will have experience and better understanding about

refrigeration system and equipment. The project will include developing equipment and

teaching material. Features of developed equipment are as follows:

1. Teaching methodology using animation and narration explanation voice completed with job

sheet and manual equipment.

2. Cycle composition: compressor – condenser – filter dryer – sight glass – expansion valve –

evaporator – compressor.

3. Can be operated manually or using PLC control system, equipped by textbook and manual

experiment.

4. Completed with software for Specification or Refrigerator Performance Automatic

Measuring and Data Acquisition and System Monitoring Program.

- Measure temperature at compressor inlet and outlet, condenser inlet and outlet,

expansion valve inlet and outlet, evaporator outlet, inside and outside chamber using

thermo couple sensors.

- Measure of pressure within the range of -1 bar up to 35 bar at each of compressor

inlet and outlet, condenser outlet, expansion valve outlet and evaporator inlet by

pressure sensors.



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- Measure of factors: refrigeration effect, compressor work, condensing effect,

evaporating latent heat, amount of flash gas at expansion valve outlet, dry rate and

humidity at expansion valve outlet and coefficient of performance (COP) in the

abstract with measured temperature and pressure data.

5. Completed with textbook related with refrigeration (theory, performance test and

troubleshoot) and automatic control experiment (sequence, PLC)

6. Windows based automatic measurement system, Excel transfer capability using RS232

interface.

7. Data acquisition systems function:

a. Real-time temperature, pressure data and view

b. Real time data of enthalpy on a diagram (P-H chart) of standard refrigeration system.

c. Real-time monitoring factors like as refrigeration effect, compressor work,

condensing heat in condenser, evaporating latent heat, amount of flash gas, dry

ratio, humidity at expansion valve outlet, coefficient of performance (COP) in the

abstract with temperature and pressure data.

d. Temperature, pressure and enthalpy data automatically saved every minute.

e. Evaporation experiment: various evaporation loads, various evaporation pressure,

various evaporation temperature and super heating.

f. Condensation experiment: over condensing operation and over condensing load

operation.

g. Compressing experiment: wet compressing operation, super heat compressing

operation and dry saturation compressing operation.

8. Teaching material that cover detail and comprehensive explanation about:

a. Operation description of circuit using a switch, contact circuit using a Magnetic contactor,

contact circuit using a relay, a basic refrigeration circuit using a magnetic contactor and

relay.

b. Operation of a basic refrigeration system by a self return circuit for priority stopping and

running.

c. Description of circuit for low and high temperature control by a thermal switch.

d. Description of circuit for low and high pressure control (LPS) by a pressure switch.

e. Description of a series circuit for low temperature and low pressure by a thermal switch and

a pressure switch in basic refrigeration system.

f. Description of a circuit for pump down control in basic refrigeration system.



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2. Principle of Measuring Temperature, Pressure and Defrost Control

Refrigeration Training Unit

In this project, the students will have experience and better understanding about

principle of measuring temperature, pressure and defrost controll system on a

refrigeration system. The project will include developing equipment and teaching

material. Features of developed equipment are as follows:

1. Teaching methodology using animation and narration explanation voice complete with job

sheet and manual equipment.

2. Cycle system: compressor – condenser – receiver – filter dryer – sight glass – solenoid

valve – heat exchanger – expansion valve – evaporator – heat exchanger – liquid separator

– compressor.

3. Hot gas-defrost cycle: compressor – solenoid valve – capillary tube – evaporator – heat

exchanger – liquid separator – compressor.

4. Can be operate on manual or using PLC control system, to control thermal control of pump

down, and hot gas defrost.

5. Function of refrigeration performance automatic measuring data acquisition equipment and

system monitoring program.



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6. Measure temperature at each of compressor inlet and outlet, condenser inlet and outlet,

expansion valve inlet and outlet, evaporator outlet, heat exchanger (gas) inlet and outlet,

inside chamber and outside using thermo couples.

7. Measure of pressure within the range of -1 bar up to 35 bar at each of compressor inlet and

outlet, condenser outlet, expansion valve outlet, and evaporator inlet by pressure sensors.

8. Measure of factors: refrigeration effect, compressor work, condensing effect, evaporating

latent heat, amount of flash gas at expansion valve outlet, dry rate and humidity at

expansion valve outlet, end coefficient of performance (COP), the abstract with

temperature and pressure data measured.

9. Complete with text book related with refrigeration (theory and troubleshoot) and automatic

control experiment (sequence, PLC, IC).

10. Windows based automatic measurement system, excel transfer capability RS232 interface.

11. Operating performance test of air cooling and cold storage performance test by increasing

and decreasing air cooling and storage load performance test for the proper refrigerant

charging.


a. Operation description of circuit using a switch, contact circuit using a magnetic

contactor, contact circuit using a relay, a basic refrigeration circuit using a magnetic

contactor and relay.

b. Operation of basic refrigeration system by a self return circuit for priority stopping

and running. Description of a circuit for low and high temperature control by a

thermal switch, a circuit for low and high pressure control by a pressure switch of a

series circuit for low temperature and low pressure by a thermal switch and a

pressure switch basic refrigeration system, of a circuit for pump down control in

basic refrigeration system.

c. Operation of a circuit for high pressure control by a pressure switch manual and

auto return.

d. Operation of a series circuit for low temperature and low pressure by a thermal

switch hand a pressure switch in defrost refrigeration system.

e. Operation of the circuit for pump down control and hot gas defrost refrigeration

system.





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6. Data acquisition function:

a. Real-time temperature, pressure data and graph view.

b. Real-time data of enthalpy on diagram of standard refrigeration system.

c. Real-time monitoring factors like as refrigeration effect, compressor work,

condensing dry ratio at expansion valve outlet, humidity at expansion valve

outlet, coefficient of performance in the abstract with temperature and pressure

data which are measure in real time.

d. Saved data of temperature, pressure and enthalpy every time.

e. Evaporation experiment: various evaporation loads, various evaporation

pressure, various evaporation temperature and super heating.

f. Condensing experiment: over condensing operation and over condensing load

operation.

g. Compressing experiment: wet compressing operation, super heat compressing

operation and dry saturation compressing operation.


a. Operation description of circuit using a switch, contact circuit using a magnetic

contactor, contact circuit using a relay, basic refrigeration using a magnetic contactor

and relay.

b. Operation of basic refrigeration circuit using magnetic contactor and relay.

c. Operation of basic refrigeration system by a self return circuit for priority stopping.

d. Operating of basic refrigeration system by a self return circuit for priority running.

e. Operating of a circuit for low and high temperature control by a thermal switch.

f. Operating of a circuit for low and high pressure control by a pressure switch.

g. Operating of series circuit for low temperature and low pressure by a thermal switch

and a pressure switch in basic refrigeration system.

h. Operating of a circuit for pump down control in basic refrigeration system.

POLBAN Final Projects Prof AgusW

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