Development of Vapour Compression Refrigerator Working On Solar And Pedals.

Project Title

Development of Vapour Compression Refrigerator Working On Solar And Pedals.

Project Area of Specialization Mechanical EngineeringProject Summary

A refrigerator is a commercial and home appliance consisting of a thermally insulated compartment and a heat pump (mechanical, electronic or chemical) that transfers heat from its inside to its external environment so that its inside is cooled to a temperature below the room temperature.

A similar device that maintains a temperature below the freezing point of water is called a freezer.

Freezer units are used in households and in industry and commerce. Food stored at or below ?18 °C (0 °F) is safe indefinitely. Most household freezers maintain temperatures from ?23 to ?18 °C (?9 to 0 °F), although some freezer-only units can achieve ?34 °C (?29 °F) and lower. Refrigerator freezers generally do not achieve lower than ?23 °C (?9 °F).

Project Objectives

 Domestic applications 

 Office and Bank applications 

 It will be very much useful in colleges and schools 

 it is specially very useful for ice cream sellers and the areas where energy problem is happened.

Project Implementation Method

 A vapour compression refrigeration system is usually made up of four essential components, namely:

1. Evaporator

2. Compressor

3. Condenser

4. Expansion valve (Throttling device).

OTHER PARTS OF A FREEZER

FREEZER BODY: This is made of plastic. It serves as the reservoir where the cold water is cooled and stored.

Thermostat: This senses the temperature of cold water and controls the electric power supply to the compressor automatically in order to keep constant the temperature of the cold water. This device will not be needed in the modified models as it will be replaced by an ice sensor.

PTC Starter: PTC stands for “Positive Temperature Coefficient”. The PTC starter starts up the motor of the compressor.

Drier: This removes moisture and dirts inside the refrigeration pipes.

Solar plates.

Battery.

Dynamo Motor for Battery Charge.

Bicycle or Pedal Frame for Dynamo Motor Running to Generate Current.

Table : Specification of Freezer under study

Voltage

12/24 v (Direct current)

Cooling power

95 Watts

Minimum temperature

-16 c

Test pressure

15 psi

Refrigerant

R134a

Benefits of the Project

1. Domestic applications 

2. Office and Bank applications 

3. It will be very much useful in colleges and schools 

4. it is specially very useful for ice cream sellers and the areas where energy problem is happened.

Technical Details of Final Deliverable

It works on the Alternating current 220V but as well as the Direct current 12V. We use the Danfoss DC compressor to work on the direct current and a designed circuit box to convert the AC supply to DC supply. By the use of DC compressor it reduces the running cost in cooling and save upto 250W per hour.

Build a cooling system that can run on batteries, solar cells and AC supply.

Final Deliverable of the Project Hardware SystemCore Industry Energy Other Industries Others Core Technology OthersOther Technologies Wearables and ImplantablesSustainable Development Goals Good Health and Well-Being for PeopleRequired Resources

Item Name	Type	No. of Units	Per Unit Cost (in Rs)	Total (in Rs)
			Total in (Rs)	70000
Compressor	Equipment	1	15000	15000
Condenser	Equipment	1	3000	3000
Evaporator	Equipment	1	4000	4000
Expansion valve	Equipment	1	2000	2000
Body	Miscellaneous	1	10000	10000
Relay/overload+PTC starter	Equipment	2	2000	4000
Solar panels	Equipment	2	10000	20000
Battery	Equipment	1	12000	12000