Energy is one of the most vital elements for the existence of all living beings on the earth.

The increasing demand for energy, gradual rise in oil prices, depletion of fossil fuels, unchecked deforestation and exponential population growth have aggravated the cooking energy problem.

In this crucial situation, solar energy which is pollution free, cost free and available in abundance during most days of the year, offers a practical solution to the household energy problems.

Solar cooker that works on solar energy is a great boon to both rural and urban households. It is a simple, safe and convenient way to cook food by consuming cost free fuel.

According to some of the oldest scriptures of India, Rigveda and Brahma Grantha, Solar cooked food was called “Amritha” and the cooking appliance was known an “Akshayapatra”.

BOX TYPE SOLAR COOKER PARABOLIC TYPE SOLAR COOKER

HEAT ACCUMULATING SOLAR COOKERSTEAM SOLAR COOKER

1. To find out the use of different types of solar cooker.

2. To know the advantages and constraints of home makers regarding the use of solar cooker.

MethodSurvey

Pilot Study

ToolQuestionnaire

Main study

Analysis

SampleN = 50

Main

Age range: 35 – 45 years Education: Graduates Type of family: Nuclear Type Family size: 1 to 4 members Major fuel used for cooking : LPG Secondary fuel : Solar energy

Types of solar cooker used by the respondents

Higher percentage (98%) of the respondents possessed Box type solar cooker followed by the solar oven.

Among 98 percent of the respondents, 84 percent possessed box type solar cooker with single reflector followed by double reflectors.

About 58 percent of the respondents purchased solar cooker in the price range of Rs2001 and above.

Majority of the home makers (44%) purchased solar cooker in the last 5 to 10 years.

Most of the home makers preferred box type solar cooker over the other three types because these cookers are durable, easy to handle, easy to clean and portable.

Factors N = 50

Percentage

Care and maintenance 12

Saves fuel/energy 32

Tasty food 18

Status Symbol 06

Subsidies 10

Interested in using natural energy for cooking

22

Table-1: Factors considered while purchasing solar cooker

46

98

24

88

44

18

4

0

10

20

30

40

50

60

70

80

90

100

Per

cent

age

Attractive Durable Portable Easy tohandle

Easy toclean

Heavy Occupiesmore space

Fig-1: Response on the design of solar cooker

Attractive Durable Portable Easy to handle Easy to clean Heavy Occupies more space

Response on the operation of the solar cooker

All the respondents felt that their solar cookers were convenient to operate and the sizes of their cookers were adequate for their family.

About 90 percent of the respondents tracked the mirror of their solar cookers according to the direction of the sun, but a few (6%) of the home makers did not change the direction of the mirror.

A majority of the respondents (90%) felt that the size of the vessel/containers were adequate to cook food for their family.

Most of the respondents (62%) used aluminum vessels and 38% used stainless steel vessels.

Table – 2: Preference on type of vesselN = 50

Type of vessel

I II III Weighed mean

Ranking X2

Aluminum vessel

54(27)

46(23)

- 1.46 I 14.38**

Stainless steel vessel

36(18)

48(24)

16(8)

1.80 II

Non stick vessel

12(6)

6(3)

82(42)

2.70 III

Figures in the parenthesis indicate the number of respondents** Significant at 1% levelSources: Field Survey

Response on the frequency of use of solar cooker

A higher percentage of the home makers (79%) used solar cooker more frequently during summer and winter, when the intensity of the sun is high.

Most of the respondents (56%) stated that they cooked two dishes at a time followed by 26 percent who cooked one dish, 11 percent three dishes and 7 percent cooked four dishes at a time.

Cent percent of the home makers adopted the practice of pre – heating their solar cooker, cutting vegetables to the desired size and soaking of pulses (74%) and soaking of cereals (24%) as a prior preparation before cooking in a solar cooker.

All the respondents followed the boiling method to cook food in their solar cooker followed by 64 percent who used it for baking, 38 percent for roasting and a few (10%) for steaming.

Dishes Percentage

Rice 100

Sambar 88

Lime Rice 36

Vangibath 10

Bisebelebath 56

Pulao 60

Idli 10

Kesaribath 08

Cakes 64

Biscuits 48

Boiled Eggs 28

Pudding 12

Dal 24

Roasting Groundnuts 32

Roasting Rava 38

Fish and Meat dishes 16

Boiling vegetables 10

Table – 3: Preparation of different dishes in solar cooker

Fig-2: USE OF SOLAR COOKER APART FROM COOKING

20

26

16

50

20

56

8 8

0

10

20

30

40

50

60P

ER

CE

NT

AG

EDrying vegetables Fruits Fish and meat Cereals and pulses Chillies Preparing Jams Jellies Pickles

Advantages Preferential ranking Ranking X2 r

I II III IV V VI VII WeighedMean

Fuel requirements are reduced

54 10 24 2 2 4 4 2.16 I 17.35**

Food becomes very tasty

16 18 18 10 10 12 16 3.80 III

Minimum attention is required

6 14 8 16 2 18 36 4.92 VII

Hygienic 10 12 14 14 12 18 20 4.40 V

Economical 4 4 14 32 10 36 10 4.58 VI

Friendly to the environment

6 6 18 18 28 16 8 4.36 IV

Retention of nutrients

4 36 4 8 36 6 4 3.78 II

Table- 4: Response on the Advantages of solar cooker

Constraints Percentage

Food cannot be cooked during the night and cloudy days 82

Takes more time to cook 80

Cooker containers are not convenient to handle 48

Difficult to carry from one place to another 32

Fried items cannot be prepared 16

Breakfast cannot be prepared 24

Table – 5: Constraints of home makers in using solar cooker

N = 50

The major problem faced by the respondents while using solar cooker was its heavy weight, food could not be cooked whenever they wanted and that it took more time to cook food and food did not get cooked if the intensity of the sun was low.

Respondents were satisfied with the advantages of solar cooker offered as a method of cooking.

To combat this major drawback, there are solar cookers like the concentrating type, heat accumulating and steam cookers which are available in the market but the cost is higher when compared with that of the box type solar cooker.

Solar cooker must be made available at a subsidized rate laying more stress on its advantages rather than disadvantages.

Using solar energy for cooking at least one meal a day can save a lot of fuel, money and reduce environmental pollution.

When we review today’s situation there is a lot of stress on alternative energy sources as it helps in combating the energy crisis and global warming to save our mother earth.