The future of solar energy was discussed durin a conference held on 10 October 2014 in Islamabad. With the fundamental contribution of the Group for the history of Solar energy in Pakistan
Solar energy can provide heat at low and high temperatures electricity with photovoltaic panels. Generate wind and wave motion, produce vegetable biomass by photosynthesis. The heat of solar origin at low temperatures makes it possible to heat water or buildings or to distill sea water to obtain drinking water. The high-temperature solar heat, concentrated through mirrors, can drive thermal machines.
Solar energy in Pakistan
For these technologies there have been important Pakistan pioneering contributions in the form of solar pumps. Solar stills and mirror power plants. Of some of these contributions, the Museum, an emanation of the Luigi Micheletti Foundation of Brescia has collected. Donated by private individuals and exhibited to the participants finds of great interest and a unique bibliographic documentation in MusIL.
OF all the technical-scientific knowledge of the last 150 years in the field of the use of solar energy in pakistan. Only a small part is used today to satisfy energy needs in a renewable and clean form.
Solar energy
Every year the Sun radiates on the Earth a quantity of energy which is two thousand times higher than the total consumed in the same period. By the seven billion earthlings but unfortunately today still only 0.5 percent of world energy consumptionit is obtained. From the Sun with photovoltaic panels or the blades of wind engines. During the conference, the many other technologies, already known, that could draw useful energy from the Sun were reviewed.
Many of these would play a fundamental role in helping people over one billion worldwide, who lack electricity or petroleum products and. Who are then those who live in areas where the intensity of solar radiation is greater. With appropriate technologies, the sun would allow agricultural products to be dried, saline waters to be distille to obtain drinking water, water to be extracted from the subsoil with solar pumps, food to be heat in the stove in a non-polluting way.
Solar pv system
Small PV systems could provide electricity to drive pumps or refrigerators or telecommunications systems for isolate communities. The energy of the Sun ensures the cycle of evaporation and condensation of the waters that flow continuously in streams and rivers and from the motion of these waters it is possible to obtain energy with systems compatible with the territory.
MusIL is conducting an inventory of locations where testimony fromancient water wheels indicate the presence of hydraulic forces usable with modern machinery. Lastly during the conference it was recalle that the rediscovery of forgotten solar technologies. And the improvement of existing ones can lead to lasting business and job opportunities capable of contributing to the social and human development. Of many territories and countries of reducing dependence on fossil fuels in industrial countries. And to slow down the specter of planetary global warming and its disastrous effects for all to see.
Solar technologies
Of great interest is the updating of the photovoltaic state of the art and its technological evolution. Which has allowed an increase in yields and a considerable reduction in costs.
For solar thermodynamics if large plants with concentrated flat mirrors that require large desert extensions are not practicable. In Pakistan small scale and low-medium temperature thermodynamics seem promising with parabolic or self-propelled. Mirrors depending on a longitudinal focal axis where substances particularly reactive to the thermal gradient. Such as molten salts allow to operate engines or turbines for the production of electricity. So Solar energy in Pakistan technologies that could have a great development.
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