How to make homemade Solar Water Heater
The homemade solar water heater is an easy DIY project that uses solar energy for heating water. In this project, we will make a solar water heater by using homemade things like wood, aluminum pipe, aluminum sheet, thermcool and transparent sheet.
In winter we generally need warm water for bathing and washing which is usually done by electric or gas geyser. The usage of these geysers not only increases the utility charges but also have a negative impact on our environment. In Pakistan, we generally face gas load shedding in winters due to its increased consumption in residential areas. The traditional geysers are not only expensive but their running cost is also high. Solar heating is one of the promising solutions which can be found with varying capacity (400-100 liters per day) but they are very expensive i.e. about 30,000 PKR which is not affordable to many. The homemade solar water heater is not only cost-effective but it is also energy efficient.
Watch Video Tutorial of homemade Solar Water Heater (Urdu) @pakscienceclub
The specifications of it as per the experiment are as following:
Working Principle of Homemade Solar heater
Unlike other solar geysers, it does not contain solar panels for its working. It simply concentrates solar radiation on the metal pipe in which the water is flowing. The temperature also escalates due to the metal sheet at the backside of the pipes. Transparent plastic sheet cover at the top provides a greenhouse effect to trap the heat inside and consequently increasing the temperature of the water. The metal surface is rough and dull so to avoid reflection and of black color to maximize the absorption of heat energy from the sun. Aluminum pipes are also painted black as they can absorb all types of radiation and best suited for increasing temperature.
General Specifications of Home made Solar geyser
- Average capacity: Approximately 720 liters per day
- Temperature range: 30-60 degree Centigrade
- Cost: PKR 3500
- Best time to use: 10 am to 2 pm
- Ambient temperature: 25-degree Centigrade
- Initial Water temperature: 16-degree Centigrade
- Final temperature: 60-degree Centigrade
- The flow rate of water: 2 liters per minute
Required Material for Homemade Solar heater
- Wooden strip (2×3/4 inch) for making frame: 12 ft
- Wooden strip (1×1 inch) for support: 6 ft
- Aluminum metal pipe (10 mm): 48 ft
- Hard sheet (3 mm): 48 ft
- Thermocol sheet: 2×4 ft
- Aluminum metal sheet: 2×4 ft
- Rubber pipe (10 mm): 5 ft
- Transparent plastic sheet: 2×4 ft
- Metal wire
- Iron nails: 1/2 inch
- Screws: 1.5 inch
- Tube bender
- Cementex glue
- Black matte paint
Steps of Construction
- First, we will make the rectangular wooden frame of 2×4 ft using 2×3/4 inch wooden strips. The frame is then supported at three different places using 1×1 inch wooden strip.
- The wooden hard sheet is fixed over the frame so to provide a firm base.
- We will fix the thermocol sheet over it as insulation so to avoid heat losses.
- The next step is to fix the metal sheet on it.
- The second part of the geyser is it's heat exchanger, we will make it using aluminum pipe and tube bender to bend the pipe in U shape.
- Rubber pipe joins the two parts of exchanger since we have to join four aluminum pipes.
- We will fix exchanger to the frame using metal wire hence keeping it at one place.
- Paint all the surface with black matte paint including exchanger pipes.
- Finally we will fix transparent plastic sheet over frame with cementex glue firmly.
- The Home made Solar water heater is now ready, the whole schematic may seems like following:
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23 DIY Solar Water Heaters to Reduce Your Energy Bills – The Self-Sufficient Living(November 15, 2021 - 11:32 pm)
[…] will take you through the building process so you can confidently build this rubber tube solar water heater. It’s cheap and easy to construct and will supply hot water to your home for years to reduce your […]
Kiran Teja(February 23, 2021 - 12:25 pm)
Can we use plastic dip pipe instead of alluminimum pipe
Abdul Rauf(April 18, 2021 - 7:27 am)
yes you can use
nusrat khwaja(April 21, 2019 - 7:16 pm)
AOA, this is a very useful project but can’t throw away the old geyser. Best would be to feed its output to the existing geyser and let geyser continue to provide temperature controlled water supply. Here are some thoughts to improve the design by brainstorming together.
1. Water that enters it will take certain time to reach the desired temperature, so need to control the in-flow. Allow more cold water in when the heated water exits out.
2. When the water reaches certain temperature, it should flow to the geyser. need a temperature controlled gate (exit gate). We do not want cold water leaving this heater at night time.
3. How should this water go into the Geyser? need to provide a T to the existing cold water inlet at the geyser?
.. more thoughts??