2017
Sustainable Technologies

This entry is all about solving a common problem of Indian households where it takes long hours to search for fuel for cooking. To help we have proposed a prototype of a cooker which can work via solar energy even at night. The complete process is simulated to check the result and validate before making the final prototype.

Finite element analysis was used to simulate the performance of thermal energy storage in a solar cooker which was fabricated by our team. This cooker stores solar energy in materials like sand for future use. It is inexpensive to construct and can be widely used in villages and urban areas. The cooker energy storage unit consists of a cubical solid block which ...

The system is comprised of 3 main components to tap into the individual sources of energy of the Ocean (Tidal, Wave & Ocean currents) and is joined together through a series of assemblies or welds.

1) Tides- The predictable changes in water level i.e. a height difference (up to 4m or even higher based on location) is the potential we tap into. Consider a float (a buoyant body, which will always remain at the surface of water due to its buoyancy) connected directly to a metal shaft. This shaft ends inside a pressure chamber. The pressure chamber is connected to a bi-directional turbine through a two-way valve. Gas (or any fluid) passing through the turbine ends in a collection ...

Title: Paddy Weeder for Random Sowing of Paddy

NEED BASED SOLUTION
Small Tool – More work

BACKGROUND AND DESCRIPTION OF RELATED ART
Presently no tools are used to remove the weeds in paddy fields. Humans stand in the field and bend and remove the weeds with hands and then submerse the weeds in mud slurry, so that the weeds decompose in the fields. Standing and bending to remove the weeds in the mud fields imposes strain on the human body, 10 to 15 people are required to remove weeds in 1 acre of a paddy field. At least two times weeds are removed in the paddy field. Total of 20 to 30 man days ...

The HHO powered engine runs in a sealed loop, circulating noble gas with HHO electrolysed from water. The input is 6 watts from driven alternator, and output around 35,000 kw. Engines are not cylinder engines rather compressionstroke and compressionless engine cores that displace twice there volume per rev, power strokes per rev is defined by number of combustion chambers squared.The engine cores are ceramic construction and around 85% efficient running in perfect circular motion, with ports for gas flow no moving valves, A 1 litre compressionless rotor engine requires 40 amps on the electrolysis cell to spin at 3,000 revs p/m and produce around 35,000 kw running at 40 amps. remember 1 amp 1 hour makes 6 litres of ...

The design of the prototype is based on three stages which transform PET (polyethylene terephthalate) into cotton fibers, which can have different applications, including packing stuffing, stuffed toys, pillows, or synthetic thread.

The design moves around three important stages of transformation:

The first is the ignition of PET in small precut flakes, (between 5 and 7 mm2) by the hopper which is responsible for feeding a screw that is housed in a jacket (cast iron) at high temperature and is responsible for Transform the PET from solid to liquid phase.

The second stage presents a centrifugation of the liquid material through a saucer that is perforated symmetrically, and is responsible for passing the material from liquid form to semi-solid ...

Solids are better insulators than liquids and there are materials that are more dense in their solid rather than their liquid phase. These two facts are at the heart of an innovative way to improve efficiency in concentrated solar energy plants. Formation of crusts of solid phase change materials reduces efficiency during operation. Addition of an electrically heated surface on the heat exchanger, intermittently operated, allows gravity to remove solid crusts, increasing operational efficiency.

Concentrated Solar Plants (CSP) produce electricity from the sun’s energy. Solar energy is transferred via collectors and receiver(s) to a power cycle where a working fluid, typically water, is evaporated under pressure and then expanded in a turbine to drive a generator. CSP plants can ...

Many models for estimating solar irradiance exist and there are still more software packages utilising these models. The majority of these models simply look at total irradiance and do not consider the influence of the spectral distribution. More sophisticated models use a single standard spectrum for the whole year. This distribution insensitive approach introduces errors since photovoltaic cells are more sensitive to some wavelengths than to others.

For my masters degree I developed a wavelength sensitive model that calculates the solar energy in high resolution across the spectrum. and recalculates it as the atmosphere changes across the the and throughout the year. My model also calculates the physical characteristic of a P-N junction photovoltaic cell. These two parts ...

Fresh produce is in high demand globally, with many trends like climate sustainability and a rapidly growing population influencing the availability. Considering these two pivotal factors, using current methods of conventional soil growing, which has a comparatively poor productivity will create a shortfall in supply of crops and produce globally, Phytoponics will be the leading technology provider in the hydroponics industry, a $20 billion global industry growing at a compound annual rate of 7-8%.

Our product is an innovative growing system combining both hardware and software components that use a form of hydroponics; Deep Water Culture, a method that has been limited to small areas of land and home use previously due to poor scope for effective scalability. Our ...

The main concern of the future is the natural resources which are being consumed rapidly with greed undermining the consequences.The use of fertilizers may improve yields today but the impact is vast on soil texture and fertility. Also, it affects the ecosystem immensely. Today we have a wide range of sensors within micro sizes and large networks to communicate and control remotely and efficiently. Extending these resources to protect and restore soil health and Eco-balance plant/tree is supplied only the deficit mineral and not dozed with fertilizers and chemicals.

To understand the model I will briefly explain the two main plant tissues, xylem and phloem. Putting it simply, the Xylem is the tissue of vascular plants that transports water and nutrients ...

Paper-Saver(TM) ink is a disappearing ink for inkjet printers. The ink erases itself after three weeks so that paper can be reused, providing pollution-free paper. It is sold as 3rd party replacement ink cartridges.

Today paper is not what it used to be. It’s not the best tool for writing, storing information, or transmitting information. Those functions have gone digital. So why do we still consume office paper at a higher per-capita rate than before the advent of computers? Why is the average document printed 5 times? Why hasn’t Business Week’s 1975 prediction of the paperless office come true? The answer is that paper hasn’t been replaced by screens; paper has become a screen. For some it’s a screen ...

Page 11 of 17