Introduction to Deciwatt's GravityLight

The impact of gravity light can be 1.2 billion people, or about 20% of the world population.
The impact of gravity light can be 1.2 billion people (~20% of the world).
UK firm Deciwatt has set out to solve one of the world's pressing problems -- lack of access to electricity -- by a new device called the GravityLight. About 20% of the world population has no access to what's now considered a basic necessity. With a rising population, especially in developing countries, unfortunately, this percentage is expected to remain the same for the next 20 years. Without cost-effective alternatives, most people have to rely on kerosene lamp. A kerosene lamp is a bottle filled with a fuel and lighting with a wick at the top. Kerosene lamps have four major disadvantages:
  • Breathing kerosene fumes everyday is equivalent to smoking 40 cigarettes a day.
  • The cost of kerosene is high relative to the income of the poorest. Poor households often spend at least 10% of their income on this power source -- as much as $36 billion according to the World Bank.
  • Kerosene lamps are dangerous since the light comes from an open fire. In India alone, 1.5 million people have been burned by kerosene lamps.
  • The world suffers from carbon dioxide pollution caused by kerosene lamps which is estimated to be about 3%.
A company called Deciwatt proposed a solution via a prototype device called the GravityLight. Unlike other power sources, the device invented by UK industrial designers Jim Reeves and Martin Riddiford requires no battery, sunlight, or wind. Its energy source is based on fundamental physics -- gravity. Seconds is all that's needed to lift the 12 kg bag which powers the device. As the weight slowly falls, GravityLight can produce 20 minutes of light. Riddiford, now 60, a cofounder of London-based product design firm Therefore and now a cofounder of Deciwatt, got the idea six years ago after leaving a meeting with a charity interested in solar tech. “I just sort of had this vision of, well, why can’t you use human power and store it as potential energy rather than in a battery,” he says. Riddiford has a record for innovative devices including the Brinlock Abacus calculator which was the first calculator with number-shaped buttons. He stated that he regrets not having done charitable work overseas in his youth and hopes to make up for it with his light. In 2013, Deciwatt raised £265,000 on crowdfunding platform Indiegogo to fund the tooling, manufacture and distribution of its first 1,000 lights. More recently, in 2015, Deciwatt won the Shell Springboard program, which supports young entrepreneurs with innovative low-carbon ideas. It received £150,000 to help develop the product further and expand into new markets, beating 150 other applicants to take the prize. Deciwatt says the GravityLight can cost as low as $10 for the owner. The actual price varies across different markets. The price will reduce in the future as mass manufacturing and the increasing efficiency of LEDs drive the cost down. Even with current prices, the owner can see a return on investment after just three months.

Introduction Note: This post was written by one of two founders of Nautical Torque, Galon Maloney, with minor edits by Shen Ge. Shen Ge recently contacted Galon to acquire an overview of the company. Two and a half years ago, on November 1, 2012, Nautical Torque Technology, a designer and manufacturer of innovative mechanical equipment and processes to produce continuous renewable electricity, announced that the U.S. Patent and Trademark Office (USPTO) issued the company its first U.S. patent. This patent is the first step towards bringing a new type of renewable to the market and help utility companies meet their renewable portfolio standards. [caption id="attachment_348" align="alignleft" width="462"]“Our next milestone is to raise seed capital to complete our first prototype and bring this essential renewable to the market”, states inventor and founder Cahill Maloney. “Our next milestone is to raise seed capital to
complete our first prototype and bring this
essential renewable to the market”, states
inventor and founder Cahill Maloney.[/caption]

Patent US 8,143,733 B2, relates to the capturing of the kinetic energy from the rise and fall of large particles of floating mass such as ships, barges, and tankers. Rather than use the horizontal force of water to turn a turbine or generator, Nautical Torque utilizes the lifting and lowering of water to capture the kinetic energy from the slow moving mass that rises and falls with the incoming and outgoing tide. The design utilizes equipment and facilities that can be securely located and protected on a dock rather than underwater or offshore, offering lower development and transmission costs than any other wave and tidal technologies on the market. Nautical Torque uses mass as the input source for simplicity and scaleability achievable within current mechanical technology.

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