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close this bookAppropriate Community Technology - A Training Manual (Peace Corps; 1982; 685 pages)
View the documentThe Farallones Institute Rural Center
View the documentCHP International, INC.
View the documentPreface
View the documentAcknowledgments
View the documentIntroduction
Open this folder and view contentsPhase I: Introduction to training
close this folderPhase II: Earthen construction and fuel-saving cookstoves
View the documentPhase II Calendar
View the documentSession 1. Environmental health and sanitation
View the documentSession 2. Traditional methods of cooking: an introduction to cookstove technologies
View the documentSession 3. Fuel-saying cookstoves: gathering information
View the documentSession 4. Cookstove design and innovations
View the documentSession 5. Thinking in pictures: introduction to design drawing
View the documentSession 6. Introduction to independent study
View the documentSession 7. Cookstove operation function and design principles
View the documentSession 8. Understanding the cookstove design process and soil mixes
View the documentSession 9. Insolation meter construction
View the documentSession 10. Cookstove construction
View the documentSession 11. Nature of volunteerism: expectations beyond training
View the documentSession 12. Food issues
View the documentSession 13. The role of the volunteer in development: definition of appropriate technology
View the documentSession 14. Stove promotion and dissemination
View the documentSession 15. Explaining completed cookstoves
View the documentSession 16. Evaluating cookstove efficiency
View the documentSession 17. Diagnosing and repairing malfunctioning cookstoves
View the documentSession 18. Other responses to fuel scarcity
View the documentSession 19. Charcoal production and stoves
View the documentSession 20. Custom and food
View the documentSession 21. Design and construction of the second stove part one: stove base
View the documentSession 22. Alternative cookstoves: presentations
View the documentSession 23. Basic nutrition
View the documentSession 24. Cookstove operation
View the documentSession 25. Cookstove development and innovation
View the documentSession 26. Cookstove information and resources/ evaluation of cookstove training
Open this folder and view contentsPhase III: Pedal/treadle power
Open this folder and view contentsPhase IV: Solar water heaters
Open this folder and view contentsPhase V: Solar agricultural dryers
Open this folder and view contentsPhase VI: Concluding the program: The energy fair
Open this folder and view contentsAppendices
 

Session 9. Insolation meter construction

Total time:

2 hours

Objectives:

* To build and use a simple insolation meter
* To begin to gather data on insolation for future application to solar projects

Resources:

* Anderson, Bruce, The Solar Home Book, pp. 58-62, 173-174
* Mazeia, Edward, The Passive Solar Energy Book, pp. 13-20
* Baer, Steve, Sunspots, pp. 118-125
* Attachment II-9-A, "Insolation Meter Data Collection Sheet"
* Attachment II-9-B, "Insolation Meter"

Materials:

Newsprint and felt-tip pens, metric scale 0-30 kg, thermometers (0°C), tape (or other fasteners), saws or knives, insulating material (rigid foam insulation, straw, newspaper, etc.), clear glazing material (glass, vinyl, etc.), 20-liter tin cans or other containers, flat black paint, paint brushes, paint thinner, sample insolation meter

Procedures:

Step 1. (10 minutes)
Begin the session by posting the words "Insolation Meter" on newsprint and asking the participants to define "insolation" and "insolation meter."

Step 2. (5 minutes)
Facilitate a brief discussion of the terms "units of insolation" and "kilogram calorie," and provide an overview of the different units of measuring insolation in different countries.

Step 3. (5 minutes)
Display the sample insolation meter. Have the participants discuss how to locate and align the insolation meter.

Trainer Notes

It is important that the participants discuss these three basic guidelines for location and alignment

The insolation meter should:

1. Be placed in a good potential solar site with maximum expo sure to the sun year-round.
2. Face the equator;
3. Be tilted to maximize insolation (See Phase III: Session 2, "Path of the Sun").

Step 4. (5 minutes)
Explain the basic guidelines for collecting data from an insolation meter.

Trainer Notes

Point out that in order to collect data from the insolation meter:

* The glazing area should be covered, with the exception of a one or two hour period when data are being collected.

* The insolation meter works best at low water temperatures and for short exposure periods (overheated water and heat loss from the meter will cause the data to be misleading).

* Water temperatures should be recorded twice during each test period -- at the beginning and at the end.

* The difference between these two temperatures is referred to as "T" or "Delta Tee."

* Data should be recorded on the "Insolation Meter Data Collection Sheet."

Step 5. (10 minutes)
Distribute Attachment II-3A and allow time for the participants to review it as well as the accompanying sample sheet.

Trainer Notes

Review each step of the sample sheet with the participants, answering any questions. Explain that they should be recording their data over the next several weeks and that this data will be applied during the solar phase of the training program.

Step 6. (90 minutes)
Distribute Attachment II-9B, "Insolation Meter.'' Have the participants form small work groups of 2 to 4 people and build and place an insolation meter.

Trainer Notes

Be sure there are adequate building materials for each work group. Post the following checklist for the construction and use of an insolation meter:

____Paint at least one face of the can flatblack.

____Fill the can no more than 90% full to allow for expansion of the water.

____Weigh the can full of water in kilograms.

____Seal the box tightly.

____Be certain the glazing is wellsealed.

____Measure the collection aperture in square meters.

____Be sure the thermometer can be read without dismantling the meter.

____Be sure the meter is properly oriented.

____Be sure the meter is properly tilted.

____See that the glazing can be completely covered at night.

INSOLATION METER DATA COLLECTION SHEET

Name:

 

Location:

 

Orientation (compass direction):

 

Tilt (degrees from horizontal):

 

Weight (in kilograms):

 

Aperture (in square meters):

 

Date

Weather Conditions

Time

Temp (ºC)

               
               
               
               
               
               

Hourly Insolation:
Daily Insolation:

Note that weight and aperture are constants. The only variable is Δt. Therefore, to find insolation, multiply weight/aperture by the Δt

INSOLATION METER DATA COLLECTION SHEET

Name:

 

Location:

 

Orientation (compass direction):

True South

Tilt (degrees from horizontal):

45º

Weight (in kilograms):

20

Aperture (in square meters):

0.1

Wdight/Aperture:

200

Date

Weather Conditions

Time

Temp (ºC)

6-10

Clear

8 AM
9 AM

16
17

1

200

   

6-11

Clear

9 AM
10 AM

16
18

2

400

   

6-13

Clear

10 AM
NOON

16
22

3

600

   

6-14

Cloudy

           

6-15

Clear

11 AM
NOON

16
19

3

600

   

6-16

Clear

NOON
1 PM

17
21

4

800

   

6-17

Clear

1 PM
3 PM

17
21

4.5

900

   

6-18

Clear

2 PM
3 PM

18
21

3

600

   

6-19

Clear

3 PM
4 PM

17
19

2

400

   
           

22.5

4500

Hourly Insolation:
Daily Insolation:

Note that weight and aperture are constants. The only variable is Δt. Therefore, to find insolation, multiply weight/aperture by the Δt.

INSOLATION METER


- Front View & Side View


- Top view


- Isometric View

KEY

1. Insulation
2. Black-painted can
3. Thermometer
4. Glazing

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