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MECHANICAL HEAT PUMP

Equipment for Engineering Education & ResearchSOLTEQ

MODEL: HE 165

THIS Mechanical Heat Pump (Model: HE 165)has been designed to provide students with a practical

and quantitative demonstration of the vapour compression cycle, and is suitable for all course levels

(intermediate to undergraduate). Refrigerators and heat pumps both use the vapour compression

cycle, and although the applications of these machines differ, the components are essentially the same. The HE

165 is capable of demonstrating the heat pump application where a large freely available energy source, such as

the atmosphere, is to be upgraded for water heating. The unit will be of particular interest to those studying

Mechanical Engineering, Energy Conservation, Thermodynamics, Building Services, Chemical Engineering, Plant

and Process Engineering, and Refrigeration and Air Conditioning

DESCRIPTION

The unit is a bench top unit with all components and

instrumentations mounted on the sturdy panel. The heat

pump consists of a hermetic compressor, a water

cooled condenser, a thermostatically controlled

expansion valve and an air heated evaporator. The

arrangement of the components are in a manner similar

to that used for many domestic air-water heat pumpswhere they are visible from the front of the unit.

During the operation, slightly superheated refrigerant

(R134a) vapour enters the compressor from the

evaporator and its pressure is increased. Thus, the

temperature rises and the hot vapour then enters the

water cooled condenser. Heat is given up to the

cooling water and the refrigerant condenses to a liquid

before passing to the expansion valve. Upon passing

through the expansion valve the pressure of the liquid

refrigerant is reduced. This causes the saturation

temperature to fall to below that of the atmosphere.Thus, as it flows through the evaporator, there is a

temperature difference between the refrigerant and the

air being drawn across the coils. The resulting heat

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transfer causes the refrigerant to boil, and upon leaving

the evaporator it has become slightly superheated

vapour, ready to return to the compressor.

The temperature at which heat is delivered in the

condenser is controlled by the water flow rate and its

inlet temperature. The evaporating temperature is

largely determined by the ambient conditions.

However, this can be limited, either by restricting the

air intake to the evaporator, or by directing warmed air

towards the intake. Instrumentations are all provided

for the measurement of flowrates of both the refrigerant

and cooling water, power input to the compressor, andall relevant temperatures.

EXPERIMENTAL CAPABILITIES

The HE 165 allows the students to perform the following:

Determination of power Input, heat output and

coefficient of performance

Production of heat pump performance curves over

a range of source and delivery temperatures

Production of the vapour compression cycle on a

p-h diagram and comparison with the ideal cycle

Determination of energy balances for the condenser

and compressor

Production of heat pump performance curves based

on the R134a properties at a variety of evaporating

and condensation temperatures

Estimation of the effect of compressor pressure ratio

on volumetric efficiency.

SPECIFICATIONS

i) Rig:

Bench top unit. Epoxy coated steel bench,

Ii) Refrigerant:

R134a

iii) Compressor:

Fully hermetic single cylinder reciprocating type.Displacement 8.85 cm

3.rev

-1.

iv) Condenser:

Refrigerant to water. Plate Heat Exchanger..

v) Evaporator:

Air to refrigerant. Serpentine copper tube with

aluminium fins and with integral fan.

vi) Instrumentations:

Indicators for the measurement of relevant

temperatures, flowrates, pressures, and motor

power input.

OPTIONAL ITEMS

- EI

DIGITAL INSTRUMENTATIONS

i) 4 units of digital indicator

ii) 6 units of temperature sensor c/w transmitters

iii) 2 units of electronic flowmeter

iv) 1 unit of power transducer

v) 2 units of pressure transmitters

-DAS

SOLDAS DATA ACQUISITION SYSTEM

i) A PC with latest Pentium Processor

ii) An electronic signal conditioning system

iii) Stand alone data acquisition modules

iv) Windows based software

Data Logging

Signal Analysis

Process ControlReal-Time Display

Tabulated Results

Graph of Experimental Results

- CAL

SOLCAL COMPUTER AIDED LEARNING

SOFTWARE

i) Interactive multimedia features

ii) Graphical simulation

iii) Experiment results samples

iv) Full experiment manuals

Equipment for Engineering Education & ResearchSOLTEQ

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REQUIREMENTS

Electrical :240 VAC/1-phase/50 Hz

Water :Laboratory tap water, 20 LPM @ 20 m head, Drainage.

OVERALL DIMENSIONS

Height : 0.65 m

Depth : 0.60 m

Width : 1.00 m

MANUAL

The unit is supplied with Operating and Experiment

Manuals in English giving full descriptions of the unit,summary of theory, experimental procedures and

typical experimental results.

Performances of Heat Pump against Condensing Temperature

0

200

400

600

800

1000

1200

35.0 37.0 39.0 41.0 43.0 45.0 47.0 49.0 51.0 53.0 55.0

Cooling Water Outlet Temperature (degC)

PowerInput/HeatOutput(W)

0.00

1.00

2.00

3.00

4.00

COPH

Power Input

Heat Delivered

COPH

TYPICAL SAMPLE RESULTS

Performance of Heat Pump VS Cooling Water Outlet Temperature

0

200

400

600

800

1000

1200

1400

30.0 32.0 34.0 36.0 38.0 40.0 42.0 44.0 46.0 48.0

Cooling Water Outlet Temperature (degC)

Powe

rInput/HeatOutput(W)

0.00

1.00

2.00

3.00

4.00

COPH

Power Input

Heat Output

COPH

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Our range of teaching equipment can be complemented with our

SOLDAS and SOLCAL software.

SOFTWARE & e - LEARNING

SOLDAS - Supervisory Control & Data Acquisition

- Data Logging

- Signal Analysis

- Process Control

- Real-Time Display

- Tabulated Results- Graph of Experimental Results

SOLCAL - Computer Aided Learning

- Multimedia Features

- Interactive- Graphic Simulation

- Experiment Result Samples

- Full Experiment Manuals

Equipment for Engineering Education & ResearchSOLTEQ

Contact us for a catalog CD

SOLUTION ENGINEERING SDN. BHD.(Co. No. 174876-M)

Sales Office :

No.3, Jalan TPK 2/4, Taman Perindustrian Kinrara,47100 Puchong, Selangor Darul Ehsan, Malaysia.Tel. No. : +(603) 80758000Fax. No. : +(603) 80755784

R&D Office :

G-2A, Incubator 3, Technology Park Malaysia,

Bukit Jalil, 57000 Kuala Lumpur, Malaysia.Tel. No. : +(603) 8996 0023

Email : solution@solution.com.myWeb site : http//www.solution.com.my/

AGENT:

BUATAN MALAYSIAMSC- Status

Company

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