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Materials, Energy and Other Branches + Agri-business and Food Science

Design a solar dryer for farm produce

Build a cabinet dryer and compare its drying time and quality with open sun drying.

  • DifficultyIntermediate
  • Estimated time2–4 weeks
  • Budget₹500–₹1,000
  • ClassClass 10 to college
  • Team2–4 people
  • You needHousehold materials

Prerequisites: None beyond your class work

Original · by TechnifyedEngineering DesignSocial Impact ProjectTwo subjects

My projects

Overview

Build a cabinet dryer and compare its drying time and quality with open sun drying.

Skills you will use

Moisture measurementThermal design

Safety

  • Use clean equipment, do not eat anything tested with chemicals, and check for allergies before a tasting.
  • Never look at the Sun directly or through any lens or telescope. Use projection or certified solar filters only.

Materials and tools

  • Wooden or cardboard cabinet
  • Black-painted collector with a clear cover
  • Mesh trays
  • Thermometer
  • Scale
  • Sliced fruit or vegetables

Tools and software

Kitchen scaleThermometer

Expected cost₹500–₹1,000About ₹800 at most, less if you borrow parts
Estimated duration2–4 weeks5 build steps, plus the report

Step-by-step roadmap

  1. Start

    You will finish with: drying curves and a comparison of quality and time.

  2. 1

    Prerequisites

    Nothing special to know first. Then collect the 6 items in the materials list.

  3. 2

    Learn

    Read up on agricultural engineering: food preservation, post-harvest, solar drying. Your textbook chapter and one short video are enough.

  4. 3

    Plan

    Sketch the design, list every part with its price and decide how you will know it works.

  5. 4

    Build

    1. Build a sloped collector that feeds warm air into a cabinet with trays.
    2. Weigh equal samples for the dryer and for open sun.
    3. Weigh both every hour.
    4. Record temperatures inside and outside.
    5. Compare drying time, colour and cleanliness.
  6. 5

    Test

    Run it ten times in a row. Note every failure, fix the cause and test again.

  7. 6

    Document

    Photograph each build stage, keep the circuit or drawing, and note what failed and how you fixed it. Report structure

  8. 7

    Present

    Demonstrate it working first, then explain how it works and what you would improve. Presentation structure

  9. 8

    Publish

    Share a short video, the parts list and the drawing or code so someone else can build it.

Expected outcome

Drying curves and a comparison of quality and time.

Other versions of this project

Advanced version

Add a small solar fan and measure the improvement.

Working as a team

2–4 people. Suggested roles:

DesignHardware and buildCode or controlTestingDocumentationPresentation

Report and presentation

Report structure

  1. Title and aim
  2. The problem it solves
  3. How it works (principle)
  4. Parts list with cost
  5. Design: drawing, circuit or block diagram
  6. Build steps
  7. Testing and results
  8. Problems faced and fixes
  9. Limitations
  10. Future improvements
  11. References

Presentation structure

  1. The problem
  2. The idea
  3. How it works (one diagram)
  4. Parts and cost
  5. The build (photos)
  6. Live demo or video
  7. Test results
  8. What did not work
  9. Next version

Viva questions

Prepare your own answers to these before you present.

  • What is the aim of your project, in one sentence?
  • What is the principle behind it?
  • Why did you choose these materials or tools?
  • What result did you get, and was it what you expected?
  • What went wrong and how did you fix it?
  • How could this be improved or used in real life?

Source and attribution

Original

Written by Technifyed. Free to use for your own school or college project; write the report in your own words. Added 1 Oct 2026.

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