Renewable Energy, Engineering for the Environment

• Sheela A.M

  How to get CDM benefits for the installation of biogas plant in public places and residences by local bodies in developing countries?

  Biogas plants are nice solutions for the treatment of degradable garbage generated. Here the energy is produced but we are not aware whether we get any financial assistance for such products.

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    Jatin Bipinbhai replied

    One Can earn 4 Credit for 2 cubic meter plant installation............

    12 days ago
• Sheela A.M

  Clean Development Mechanisms for harnessing Solar Energy in developing countries (solar grid connection)

  Developing/undeveloped countries are situated on the equatorial/tropical region, where there are no facilities for harnessing solar energy. How could those countries harness solar energy forDeveloping/undeveloped countries are situated on the equatorial/tropical region, where there are no facilities for harnessing solar energy. How could those countries harness solar energy for development while preventing pollution which is responsible for global climate change?
• Ram Mohana Vamsee Bapatla

  Can anyone please help me in finding a suitable source of generating power using green technology for a iron casting industry?

  We have an industry with a max load of 500kw. I like to use non conventional source of power to support my plant. What technologies we can use for generating the required power on site? This site hasWe have an industry with a max load of 500kw. I like to use non conventional source of power to support my plant. What technologies we can use for generating the required power on site? This site has good solar power capacity but wind is not feasible as its not an windy area . But problem with solar photo-voltaic is the initial cost is too high. Is it possible to use waste heat recovery technique to generate power? Please suggest some latest technology for using in this plant. Currently we have 2 days power holiday imposed by our government due to shortage in power supply and it is affecting our working capacity.

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    Dr Dharmasa Hemadrasa replied

    There are SEVEN fundamental methods of directly transforming other forms of energy into electrical energy: •Static electricity, from the physical separation and transport of charge (examples:There are SEVEN fundamental methods of directly transforming other forms of energy into electrical energy: •Static electricity, from the physical separation and transport of charge (examples: triboelectric effect and lightning) •Electromagnetic induction, where an electrical generator, dynamo or alternator transforms kinetic energy (energy of motion) into electricity, this is most used form for generating electricity, it is based on Faraday's law, can be experimented by simply rotating a magnet within closed loop of a conducting material (e.g Copper wire) •Electrochemistry, the direct transformation of chemical energy into electricity, as in a battery, fuel cell or nerve impulse •Photoelectric effect, the transformation of light into electrical energy, as in solar cells •Thermoelectric effect, direct conversion of temperature differences to electricity, as in thermocouples, thermopiles, and Thermionic converters. •Piezoelectric effect, from the mechanical strain of electrically anisotropic molecules or crystals •Nuclear transformation, the creation and acceleration of charged particles (examples: betavoltaics or alpha particle emission) PLUS EIGHTH ONE * Microbes to Generate Electricity: http://www.sciencedaily.com/releases/2011/05/110523152337.htm DO YOU HAVE NEW methods of directly transforming other forms of energy into electrical energy If so please ENUMARATE and mail me : rdharmasa@gmail.com

    Mar 24, 2012
• Mohannad Al-Mahdawi

  Horizontal Axis or Vertical Axis Wind Turbines?

  Hi dear all I'm interest in Wind Turbines and I found tow types Horizontal Axis & Vertical Axis, I wonder which one is more efficient? why? thank you

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    Dr Dharmasa Hemadrasa replied

    Mr Sunil Payak follow below mentioned list: I guide what to do next to publish a paper on the same... Dr Dharmasa-00968-95231621 For BLDC motor for wind turbine of 8V DC(with 15 degree) 50-60Mr Sunil Payak follow below mentioned list: I guide what to do next to publish a paper on the same... Dr Dharmasa-00968-95231621 For BLDC motor for wind turbine of 8V DC(with 15 degree) 50-60 wattt Which wind turnbine design is better verticle or horihontal? What could be size i.e length of the blade? What could be weigth of the blade? What is the optimun range of the speed? mail me indipendent or all anawer:

    Mar 20, 2012
• Anastasia Putry Chrystyanty

  Is there simulation or modelling software to analyze thermodynamics of solar thermal plants?

  I would like to model a design of a solar thermal power plant. Solar thermal plants should be the same the same as other power plants in this respect.

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    Rao Padmanabha replied

    Honestly I had no information on simulators for solar application as I am not dealing with solar systems.Our good friends working in this field hv given good references.Thanks to our frofessionalHonestly I had no information on simulators for solar application as I am not dealing with solar systems.Our good friends working in this field hv given good references.Thanks to our frofessional friends / community.

    Mar 20, 2012
• Devi Kunapareddy

  If renewable energy exhaustive?

  What is the other alternative?

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    Hasan ali Mirza replied

    we should save energy for the future needs instead of thinking of alternative

    Mar 20, 2012
• Lukas Drude

  Where can I find an overview about current photovoltaic research incentives?

  I am interessted in an overview about governmental research incentives regarding solar and photovoltaic research. Nice would be some kind of timeline explaining when what kind of photovoltaicI am interessted in an overview about governmental research incentives regarding solar and photovoltaic research. Nice would be some kind of timeline explaining when what kind of photovoltaic research was of public interest. I would like to compare incetives in different countries. I tried to search for google-scholar-statistics regarding keywords, but also there I was not able to find something. Thank you in advance for some links or names of institudes which might provide information. Lukas
• Sujith Sudhir

  What are the latest advances in hybrid power generation?

  Hybrid power systems is part of power system, where by the reliability of continuous power is increased. What are the latest advances?

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    Francis Mujjuni replied

    Gare... you are an amazing Teacher!!! Thanks

    Mar 16, 2012
• Roberta Costanzo

  Can anyone help me in finding IEC 904 Standards Series for Photovoltaics (or ASTM E927 Series and ASTM 1021)?

  Needs for Standards for Photovoltaics
• Alfredo Erlwein

  Does anyone know a method or software for modelling a set of different renewable energies in order to get the best combination of them?

  I am working on the most adequate combination of sources of renewable energies for the needs of rural communities in the south of Chile. I am using variables of economic, energy efficiency andI am working on the most adequate combination of sources of renewable energies for the needs of rural communities in the south of Chile. I am using variables of economic, energy efficiency and environmental performance of such combination of sources. Thanks!

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    Alfredo Erlwein replied

    Thank you Anastasia! Homer is rising in votes =) I´ll check out. Regards, Alfredo

    Mar 5, 2012
• Luciana Andrade

  What's the best kind of renewable energy that can be used to help isolated and poor communities of poor countries, fotovoltaic or eolic energy?

  I have worked on a project to help taking fotovoltaic energy to isolated and poor communities of northest of Brazil and I thought that fotovoltaic energy has some disadvantages like technicalI have worked on a project to help taking fotovoltaic energy to isolated and poor communities of northest of Brazil and I thought that fotovoltaic energy has some disadvantages like technical problems that are common to happen and also the battery can suffer from damage or cause environment impacts if it is not taken to recicling when they are not working anymore. I don´t know much about the eolic energy but I think it could be a better solution for those communities, maybe they have less disadvantages.

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    Anek Lohakulvich replied

    "ขอบคุณครับ" mean thank you in thai.

    Mar 2, 2012
• Jayadev Bupathi

  Can we use solar lamps instead of street lights with effective cost?

  Can we use it in a efficient way which is climate resistant and external damage.

  

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    Jake Tan replied

    I think the efficiency is still rather low as compared to the traditional mono-Si. It is still a long way to achieving an optimistic ROI

    Feb 28, 2012
• Carolyn Chainey-Davis

  Solar Thermal: Waterless technologies for mirror washing?

  What waterless technologies are available/affordable now to solar thermal developers for mirror washing that can be used to minimize the bio/water resource impacts of groundwater pumping in theWhat waterless technologies are available/affordable now to solar thermal developers for mirror washing that can be used to minimize the bio/water resource impacts of groundwater pumping in the desert? Groundwater pumping in the CA desert is a contentious issue that can deny or delay a project. Are their any alternatives (to water) for the boiler make-up water?

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    Dr Dharmasa Hemadrasa replied

    Can we adopt the CRIZOL lens(optical) cleaning technology for solar glass planel cleaing purpose and is this technology is costlier? Dr Dharmasa rdharmasa@gmail.com

    Feb 28, 2012
• Derrick Ferree

  I need to know what's wrong with this hypothetical design and idea so that I can sleep at night. I'm an independent researcher/inventor with only a few introductory courses in Physics & MeteorologyI need to know what's wrong with this hypothetical design and idea so that I can sleep at night. I'm an independent researcher/inventor with only a few introductory courses in Physics & Meteorology to my credit. However, I think there's some merit to this, because MIT studied the Coriolis Effect in a controlled setting before, and found that it can have an effect on draining water in a water tank. I propose we use that to design a highly efficient design for green energy.

  Nature1.doc

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    Oscar Jesus Ojeda replied

    Regarding your concept, you are proposing a sort of closed-loop water circuit, because first you extract the energy from the water as it escapes from the first reservoir, but in the last step youRegarding your concept, you are proposing a sort of closed-loop water circuit, because first you extract the energy from the water as it escapes from the first reservoir, but in the last step you pump back the water into the same reservoir. And there is where the efficiency of the technical devices plays against you. If the potential energy available in the first place is 100, your turbine will extract only 90, then your generator will transform (90x0.8)=72 into electrical form. When you are at the pumping station you will need 100 energy units to put the water back into the reservoir, but the pump will require more of that in its shaft: 100/0.8=125, and then the electric motor will require 125/0.85=147 ! In plain words, you will have to INJECT 147-72=75 energy units, energy that you will have to BUY elsewhere. Well, of course you can try to squeeze out a little more here and there, but clearly you will have a net surplus to sell ! Regarding the coriolis effect, careful measurements made in my previous job demonstrated that it can improve 1% the efficiency of the water turbine at best. (But 1% is vital to win a contract, so it is carefully taken into account in the design of the water ways )

    Feb 24, 2012
• Salam Noor Al-Deen Salman

  A renewable energy systems

  I need to know the system that i could use in cooling ,heating and electrical supply for a building ? i need to study the solar, wind and geothermal modern systems used in the previous purposes.

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    Salam Noor Al-Deen Salman replied

    thank you Mr.Marcos Rodriguez ... it was really nice to know about your experiance on this amazing kind of project, that's what I am up to do, my project is to study this systems to supply a house inthank you Mr.Marcos Rodriguez ... it was really nice to know about your experiance on this amazing kind of project, that's what I am up to do, my project is to study this systems to supply a house in Jordan, and the systems we could use in Jordan are solar, wind and geothermal only! so I am trying to find cheap and efficient systems to help us with the financial part.

    Feb 23, 2012