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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.
12. 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 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.
7. 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, 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.