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Solar Powered Refrigerator
A solar-powered refrigerator is a refrigerator which runs on energy directly provided by sun, and may include photovoltaic or solar thermal energy. Solar-powered refrigerators are able to keep perishable goods such as meat and dairy cool in hot climates and are used to keep much-needed vaccines at their appropriate temperature to avoid spoilage. Solar-powered refrigerators are typically used in off-the-grid locations where utility-provided AC power is not available. History In 1878, at the Universal Exhibition in Paris, Augustin Mouchot displayed Mouchot's engine and won a gold medal in Class 54 for his works, most notably the production of ice using concentrated solar heat. "In developed countries, plug-safely, but in developing countries, where electricity supplies can be unreliable, alternative refrigeration technologies are required". Solar fridges were introduced in the developing world to cut down on the use of kerosene or gas-powered absorption refrigerated coolers w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Naval Special Warfare Support Technicians Receive Training On A Solar-powered Refrigerator March 12, 2012, At Joint Expeditionary Base Little Creek-Fort Story, Va 120312-N-AT856-010
A navy, naval force, military maritime fleet, war navy, or maritime force is the military branch, branch of a nation's armed forces principally designated for naval warfare, naval and amphibious warfare; namely, lake-borne, riverine, littoral zone, littoral, or ocean-borne combat operations and related functions. It includes anything conducted by surface Naval ship, ships, amphibious warfare, amphibious ships, submarines, and seaborne naval aviation, aviation, as well as ancillary support, communications, training, and other fields. The strategic offensive role of a navy is Power projection, projection of force into areas beyond a country's shores (for example, to protect Sea lane, sea-lanes, deter or confront piracy, ferry troops, or attack other navies, ports, or shore installations). The strategic defensive purpose of a navy is to frustrate seaborne projection-of-force by enemies. The strategic task of a navy also may incorporate nuclear deterrence by use of submarine-launche ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Game (hunting)
Game or quarry is any wild animal hunted for animal products (primarily meat), for recreation ("field sports, sporting"), or for trophy hunting, trophies. The species of animals hunted as game varies in different parts of the world and by different local jurisdictions, though most are terrestrial animal, terrestrial mammals and birds. Fish caught non-commercial fishing, commercially (recreational fishing) are also referred to as game fish. By continent and region The range of animal species hunted by humans varies in different parts of the world. This is influenced by climate, faunal diversity, taste (sociology), popular taste and locally accepted views about what can or cannot be legitimately hunted. Sometimes a distinction is also made between varieties and breeds of a particular animal, such as wild turkey and domestic turkey. The flesh of the animal, when butchered for consumption, is often described as having a "gamey" flavour. This difference in taste can be attributed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Photovoltaics
Photovoltaics (PV) is the conversion of light into electricity using semiconducting materials that exhibit the photovoltaic effect, a phenomenon studied in physics, photochemistry, and electrochemistry. The photovoltaic effect is commercially used for electricity generation and as photosensors. A photovoltaic system employs solar modules, each comprising a number of solar cells, which generate electrical power. PV installations may be ground-mounted, rooftop-mounted, wall-mounted or floating. The mount may be fixed or use a solar tracker to follow the sun across the sky. Photovoltaic technology helps to mitigate climate change because it emits much less carbon dioxide than fossil fuels. Solar PV has specific advantages as an energy source: once installed, its operation does not generate any pollution or any greenhouse gas emissions; it shows scalability in respect of power needs and silicon has large availability in the Earth's crust, although other materials required ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solar-powered Devices
Solar power, also known as solar electricity, is the conversion of energy from sunlight into electricity, either directly using photovoltaics (PV) or indirectly using concentrated solar power. Solar panels use the photovoltaic effect to convert light into an electric current. Concentrated solar power systems use lenses or mirrors and solar tracking systems to focus a large area of sunlight to a hot spot, often to drive a steam turbine. Photovoltaics (PV) were initially solely used as a source of electricity for small and medium-sized applications, from the calculator powered by a single solar cell to remote homes powered by an off-grid rooftop PV system. Commercial concentrated solar power plants were first developed in the 1980s. Since then, as the cost of solar panels has fallen, grid-connected solar PV systems' capacity and production has Growth of photovoltaics, doubled about every three years. Three-quarters of new generation capacity is solar, with both millions of rooft ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Food Storage
Food storage is a way of decreasing the variability of the food supply in the face of natural, inevitable variability. p.507 It allows food to be eaten for some time (typically weeks to months) after harvest rather than solely immediately. It is both a traditional domestic skill (mainly as root cellaring) and, in the form of food logistics, an important industrial and commercial activity. Food preservation, storage, and transport, including timely delivery to consumers, are important to food security, especially for the majority of people throughout the world who rely on others to produce their food. Significant losses of food are caused by inadequate storage conditions as well as decisions made at earlier stages of the supply chain, which predispose products to a shorter shelf life. p.645 Adequate cold storage, in particular, can be crucial to prevent quantitative and qualitative food losses. Food is stored by almost every human society and by many animals. Storing o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
UN-Energy
UN-Energy is an interagency mechanism within the system of the United Nations related to energy. It was created after the 2002 World Summit on Sustainable Development in Johannesburg, and its purpose is to create a coherent approach towards a sustainable energy system especially in developing countries to meet the Millennium Development Goals. To do this, UN-Energy is reviewing energy-related activities within the UN system and trying to mainstream them into a broader approach. At present, UN-Energy remains a very small UN entity since it does not even reach the programme status. UN-Energy was established as a subsidiary body of CEB in 2004 to help ensure coherence in the United Nations system’s multi-disciplinary response to the World Summit on Sustainable Development (WSSD) and to promote the effective engagement of non-UN stakeholders in implementing WSSD energy-related decisions. Its membership consists of senior officials and experts on energy of the commissions, organizat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solar Power In South Asia
For solar power, South Asia has the ideal combination of both high solar insolation and a high density of potential customers. Cheap solar can bring electricity to a major chunk of subcontinent's people who still live off-grid, bypassing the need of installation of expensive grid lines. Also since the costs of energy consumed for temperature control squarely influences a regions energy intensity, and with cooling load requirements roughly in phase with the sun's intensity, cooling from intense solar radiation could make perfect energy-economic sense in the subcontinent. Renewable energy by country Afghanistan Renewable energy in Afghanistan is seeing significant growth and development, tapping into the country's rich natural resources. The country's hydroelectric potential is notably high, with rivers capable of producing an estimated 23,000 MW of power. Currently, hydropower installations include both large-scale plants and smaller micro-hydropower schemes, cumulatively ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SolarAid
SolarAid is an international development charity which is working to create a sustainable market for solar lights in Africa. In line with the Sustainable Development Goal 7: "Ensure access to affordable, reliable, sustainable and modern energy for all", the organisation's aim is to reduce global poverty and climate change through providing access to solar lights for rural communities. SolarAid wholly owns the social enterprise, SunnyMoney, the largest seller of solar lights in Africa. SolarAid was founded by Solarcentury, a solar energy company based in the UK. Aims and focus SolarAid aims to light up every home, school and clinic in Africa by 2030, using safe, clean, solar power. The charity's social enterprise, SunnyMoney, operates in Zambia and Malawi. SolarAid also work through partners in Uganda and Senegal in West Africa. Awards SolarAid is the recipient of a 2013 Google Global Impact Award, a 2013 ''Guardian'' Sustainable Business Award. and the 2013 Ashden Gold Award. Se ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Renewable Energy In Developing Countries
Renewable energy in developing countries is an increasingly used alternative to fossil fuel energy, as these countries scale up their energy supplies and address energy poverty. Renewable energy technology was once seen as unaffordable for developing countries. However, since 2015, investment in non-hydro renewable energy has been higher in developing countries than in developed countries, and comprised 54% of global renewable energy investment in 2019. The International Energy Agency forecasts that renewable energy will provide the majority of energy supply growth through 2030 in Africa and Central and South America, and 42% of supply growth in China. Most developing countries have abundant renewable energy resources, including solar energy, wind power, geothermal energy, and biomass, as well as the ability to manufacture the relatively labor-intensive systems that harness these. By developing such energy sources developing countries can reduce their dependence on oil and nat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Absorption Refrigerator
An absorption refrigerator is a refrigerator that uses a heat source to provide the energy needed to drive the cooling process. Solar energy, burning a fossil fuel, waste heat from factories, and district heating systems are examples of heat sources that can be used. An absorption refrigerator uses two coolants: the first coolant performs evaporative cooling and then is absorbed into the second coolant; heat is needed to reset the two coolants to their initial states. Absorption refrigerators are commonly used in recreational vehicles (RVs), campers, and caravans because the heat required to power them can be provided by a propane fuel burner, by a low-voltage DC electric heater (from a battery or vehicle electrical system) or by a mains-powered electric heater. Absorption refrigerators can also be used to air-condition buildings using the waste heat from a gas turbine or water heater in the building. Using waste heat from a gas turbine makes the turbine very efficient because ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Refrigerator
A refrigerator, commonly shortened to fridge, is a commercial and home appliance consisting of a thermal insulation, thermally insulated compartment and a heat pump (mechanical, electronic or chemical) that transfers heat from its inside to its external environment so that its inside is cooled to a temperature below the room temperature. Refrigeration is an essential Food preservation, food storage technique around the world. The low temperature reduces the reproduction rate of bacteria, so the refrigerator lowers the rate of Food spoilage, spoilage. A refrigerator maintains a temperature a few degrees above the freezing point of water. The optimal temperature range for perishable food storage is .Keep your fridge-freezer clean and ice-free ''BBC''. 30 April 2008 A freezer is a specialized refrigerator, or portion of a refrigerator, that maintains its contents’ temperature below the freezing point of water. The refrigerator replaced the icebox, which had been a common househ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Off-the-grid
Off-the-grid or off-grid is a characteristic of buildings and a lifestyle designed in an independent manner without reliance on one or more public utilities. The term "off-the-grid" traditionally refers to not being connected to the electrical grid, but can also include other utilities like water, gas, and sewer systems, and can scale from residential homes to small communities. Off-the-grid living allows for buildings and people to be self-sufficient, which is advantageous in isolated locations where normal utilities cannot reach and is attractive to those who want to reduce environmental impact and cost of living. Generally, an off-grid building must be able to supply energy and potable water for itself, as well as manage food, waste and wastewater. Energy Energy for electrical power and heating can be derived from burning hydrocarbons (e.g., diesel generators, propane heating), or generated on-site with renewable energy sources such as solar (particularly with photovolta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
