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Go Green with Hybrid Wind Mills

First and foremost, it is important to remember that mankind needs to stop global warming, secondly become self sufficient energy wise and finally live and let live. Installing green energy ensures that the burden on the state for infrastructure development in the Energy sector is reduced, you save on the power bills and you beat inflation in power rates. In the bargain you also set a great example in the eyes of the younger generation to follow and it improves the aesthetics of the building or premises.

Advantages of using a combination of wind and solar for power generation

Being in tropical country, it is recommended that we have a hybrid combinational system. Reliability of the system increase drastically as both forces act to generate energy and the storage battery size also reduces, bringing down the cost. Additionally, you are assured of a steady power supply through all the seasons and there is a significant improvement in output and performance. In addition, apart from the MNRE, Delhi gives a subsidy of 1 lakh per installed kilowatt only on hybrid systems.

Despite its advantages, this technology is not getting wider acceptance

People are not aware that these windmill systems weigh hardly 400kg. They are also not aware that these are installed on Anti Vibration pads which ensure that the vibrations are not transferred to the super structure of the building.

Feasible of installing hybrid energy in housing societies

Nearly all the housing societies are high rise buildings and therefore this gives the system an edge over ground installation. The height of the building adds to the advantage as the wind speeds exponentially increases with height.

This combination of solar and wind energy is recommended for any society which is more than eight to nine floors high and does not have any buildings that are taller than it in the near vicinity. Similarly, large societies with more than 40 flats are best suited for such installations. In event of wind mill installation being difficult, they have the option of opting only for solar energy generation.

All societies – small buildings or individual bungalows, in coastal areas are best for such installation. Societies having large or underground car parking should also install the system. Societies having large play areas or a large quantity of street lights are recommended to have green energy generation systems.

Cost structure of a typical project and the time frame for return on investment

A typical 5kw hybrid would cost nearly 16 lakh in which you would get a refund of 5 lakh bringing down the investment to just 11 lakh and if the society is paying taxes it is also eligible for a further depreciation benefit amounting to 4.5 lakh eventually bringing the system cost down to just 6.5 lakh which would pay for itsef in just two and half years.

Points to remember while installing a system

  • System sizing
  • The autonomy should be comfortably taken to at least two days for the system
  • The battery bank should have the proper ampere hour rating
  • The Wind Mill should be CWET certified
  • Availability of subsidy on the system
  • Availability of the spare parts
  • Checking the previously installed systems with a birds eye
  • Size of the organization installing the wind mill, are the staff educated enough for such installations.
  • Do not install at all if anti vibration pads foundation is not being provided.
  • The Wind Mill should be MNRE approved.
  • Call the installing vendor at odd times to check if he responds to any calls at any hour, as you would be installing a system which might require certain attention at any time of the day or night in any season.
  • Get a clear picture of the payments that are to be done before hand, instead of getting surprises at a later on date.

What is your experience of providing green energy for residence?

It brings down the electric bills and ensures uninterrupted power supply. One normally buys an inverter and a battery bank for residences, however in the system provided by Go Green Ventures, the inverter and battery are already provided. The customer needs to spend just 75% to 80% of the system cost for GREEN energy generation.

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Case Study: 24 floored twin tower in Goregaon, Mumbai

Height of the building : 24 floors 5kw Wind Mill & 5kw Solar Photo Voltic panels Power of 4750 unit/month is being saved which amounts to 45,000

The client required all the common areas to be illuminated on Green energy. Normally, one would have recommended installing three windmills, however after converting all the lights to LED’s Go Green Ventures drastically reduced the consumption and had to install only one windmill.

Prior to installing the system, the society incurred power bills to the tune of 45,000pm. This reduced to 15,000pm after converting the regular lighting to LED’s and then further brought down to 1250pm after installing the Hybrid Wind Mill system

The residents do not require to pay any electric bill now for the common utilities and the break even will happen within four years time on the investment done. They will enjoy free supply for the coming 20 more years.

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New Technology may Reduce Cost of Solar Energy by 75%

A new solar technology developed at RTI International (Research Triangle Institute) could make solar energy more affordable by 75% and thus speed-up its market adoption.

RTI’s solar cells are formed from solutions of semiconductor particles, known as “colloidal quantum dots” that can have a power conversion efficiency competitive to traditional cells at a fraction of the cost.

Colloidal quantum dots are inorganic semiconductors that are synthesized and processed in solution and combine the advantages of organic materials with those of inorganic semiconductors. They differ from conventional traditional bulk inorganic semiconductors in that colloidal quantum dots have tunable optical and electronic properties owing to the quantum size effect. Other uses that RTI has experience in include visible and infrared photodiodes, photovoltaic cells, and photosensor arrays.

The RTI developed solar cells were created using low-cost materials and processing techniques that reduce the primary costs of photovoltaic production, including materials, capital infrastructure and energy associated with manufacturing.

The preliminary analysis of the material costs of the technology show that it can be produced for less than $20 per square meter, which can be as much as 75% less than traditional solar cells.

Ethan Klem, a research scientist at RTI and co-principal investigator of the project said in the Institute’s press release, “Solar energy currently represents less than 1% of the global energy supply, and substantial reductions in material and production costs of photovoltaics are necessary to increase the use of solar power. This technology addresses each of the major cost drivers of photovoltaics and could go a long way in helping achieve that goal.”

In demonstration tests, the cells consistently provided a power conversion efficiency above 5%, which is comparable to other emerging photovoltaic technologies.

Jay Lewis, a senior research scientist at RTI and the project’s other principal investigator points out, “The efficiency of these devices is primarily limited by the amount of sunlight that is absorbed. There are many well-known techniques to enhance absorption, which suggests that the performance can increase substantially.”

The cells, which are composed of lightweight, flexible layers, have the potential to be manufactured using high volume roll-to-roll processing and inexpensive coating processes, which reduces capital costs and increases production. Unlike traditional solar cells, the RTI-developed cells can be processed at room temperature, further reducing input energy requirements and cost.

In addition to being low-cost, the new cells have several other key benefits, including higher infrared sensitivity, which allows the cells to utilize more of the available solar spectrum for power generation.

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