Swaziland is a small country, in Southern Africa, bordered by South Africa and Mozambique....

• Swaziland is a small country, in Southern Africa, bordered by South Africa and Mozambique.

• Population: 1,185,000

• The head of state is the king, currently King Mswati III

• Most Swazis live in rural homesteads, the principal occupation is either subsistence farming or livestock herding

• Swaziland ranks as a lower middle income country, but it's estimated that 69% of the population lives in poverty

• Swaziland is critically affected by the HIV and AIDS pandemic, and has the highest HIV infection rate in the world (26% of all adults)

• Swaziland has the lowest life expectancy in the world at 31.88 years

• Tuberculosis is also a significant problem, with an 18% mortality rate

PALFRIDGE COMMITMENTExploring future

refrigeration technology in synergy with nature

THE NEED FOR A SUSTAINABLE SOLUTION

FOR REFRIGERATING VACCINES , FOOD AND

BEVERAGES IN DEVELOPING COUNTRIES

GTZ Terms of Reference

To preserve medicine , food & beverages for human consumption at high ambient temperatures ( 48°c ) using solar energy without the use of chemical storage batteries.

Key Design Criteria•Sustainability•Simplicity•Safety•Reliability•Robustness

Commercial Merchandiser

(LC 86)Domestic Unit

(LS 150)

The Solar therm Range

Medical Unit (MC 72)

Operation of the Solar therm Units

• During sunlight hours, energy from the sun is converted into electrical energy, which is used to cool the product. Any excess energy is stored in a ballast load ( Phase Change Material ) and is used during low light & low energy conditions.

• The cooling system has no battery storage and comprises of the refrigerator and 2 x 90 watt Photovoltaic panels

Operating Principles

MC72 AIR FLOW THROUGH DAMPERS

VACCINE COMPARTMENT

(2°C – 8°C)

ICE PACK COMPARTMENT

(-18°C)

VACCINE STORAGE BASKET

ICE PACKS

DAMPERS

BALLAST LOAD

REFRIGERANT COIL

COOLPLATES

MC72-Medical Unit

• This equipment is designed for hospitals, clinics, and ambulances. This Chest Type unit comprises of two compartments:

-Vaccine storage-Freezer compartment.

• A mechanical damper regulates the amount of cooling and keeps it between 2°C and 8°C.

• The dampers and controller are preset to achieve optimum vaccine temperatures in all ambient temperature conditions.

• Ample insulation also allows for vaccines and medicines to be safely stored for extended periods of time in low light conditions.

Performance Characteristics at 48°C ambient and 75%Rh

LC86-Commercial Merchandiser

• This is a commercial merchandiser comprising of controller and BD35k compressor. Beverages are stored in a basket suspended from the top of the cabinet.

• The unit has a ballast load. The remainder of the space is filled with product. The controller is pre-set to achieve optimum beverage temperatures in all ambient temperature conditions.

Performance Characteristics at 48°C ambient and 75%Rh

LS150-Domestic• This unit is designed for the

storage of fresh food, and is aimed primarily at rural homesteads and areas with intermittent power supply from the national grid.

• It is a single door design with separate fridge and freezer compartments that are able to maintain temperatures from 2°C to –9°C.

• Ample insulation also allows for food to be safely stored for extended periods of time in low light conditions.

• The controller is preset to achieve optimum fresh food temperatures in all ambient temperature conditions.

Performance Characteristics at 43°C ambient and 75%Rh

COST OF REFRIGERATORSMODEL BOS

ItemsBOS

Cost - €

RefrigeratorCost - €

Total Cost - €

LC 86Merchandiser

2 x 90w panels10m x 4mm² CableMounting BracketsElect. Plugs & Acc.

550 808 1358

MT 150Domestic

2 x 90w panels10m x 4mm² CableMounting BracketsElect. Plugs & Acc.

550 924 1474

MC 72Medical

2 x 90w panels10m x 4mm² CableMounting BracketsElect. Plugs & Acc.Ice Packs

550 1089 1639

TESTING & APPROVALTwo phases viz

•Laboratory – as per WHO PQS specs – Simulated Load & Power supply to unit.

•IEC 60335 1/2/24 – Safety Specs.

•SANS 15502 – Performance

•CE Declaration

•Field operation – tested in situation at various countries in both hemispheres in all ambients.

- Refrigerator performance data collected using remote radio link.

Data Collection• Performance data ( temperature & power

consumption ) is logged electronically.

• Alarms ( door open etc ) also logged.

• Data is transmitted daily via the telephone network to a website.

• The website collates the data from all the various loggers worldwide and presents it in a readable pictorial format.

• Anyone can ascess the website and review the test data.

• Data is transferred via GPRS or MMS – Simply Cellular network.

• Data is transferred to a satellite via APRS and the location is transmitted to the website.

• Palfridge has the co-ordinates of every refrigerator and know its operating status !!!!

Communication & Global Positioning

Installation & Maintenance

Accessory Specs

•2 x 90 watt monocrystalline panels.

•Roof mounting brackets and fixtures.

•Intermediate 4mm² x 10m cable and plug.•Solar panel placement directions.•Operating Instructions.•Spare parts exploded view and ordering info.

Installation Procedure

1.Open the cover with a screw driver.

2. Undo nylon screw cap and insert cable

3. Insert and push cable

4. Lift clip using screw driver, push cable in and release clip.

5. Screw back nylon cap to tighten cable. Repeat procedure for connecting other polarity.

6. Close cover

Installing Fridge to Solar Modules

Female Hella

Male Hella

Connect male hella to female hella

Installing Fridge to Solar Modules

Female Hella

Male Hella

Connect male hella to female hella

Wiring Schematic with Data Logger

Spare PartsThe following components are replaceable

Fan Electronic

ControllerHinge

CompressorCondenser

Gasket

SPARE PARTS WITH STOCK CODES

ModelComponent

Compressor Fan Damper Gasket Controller Hinge

MC72 010085 073120 909275 131005 071760 150005

LC86 010085 073120  - 131005 071760 150005

LS150 010085 073120 -  130017 071760 - 

Troubleshooting GuideFAULT

Compressor is notrunning, and the icepacks are not cold

Compressor is running,and the temperature istoo high

Temperature in solar-therm is too low

No temperature isdisplayed

The ventilation grill is blocked.

The lid is not closed properly.

The fan in the compressorcompartment is blocked or defective.

The temperature in the room in whichthe appliance is installed is too high.

The internal lid is not placed properly.

The display battery is flat.

POSSIBLE CAUSE

Be patient, it is most likely that thecompressor will start within a fewminutes

REMEDY

if this is not the case, check thefollowing:-check that power is connected andthat the wire from the solar panel tothe appliance is intact.-if the above is OK, call technicalsupervisor.

Ensure unhindered air circulation.

Ensure that the lid is closed properly.

Check that the fan is running, if notit should be replaced.

shield the appliance against directsun light and ensure more ventilationto the room.

Ensure that the internal lid is placedcorrectly.

Change the battery. See section:service