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October 21, 2014 | Parched capital

CSE has documented well the ancient water harvesting methods which need to be studied and standardised. Our approach should be,MODERNISE THE TRADITIONAL - TRADITIONALISE THE MODERN.

Dr.A.Jagadeesh Nellore(AP),India

By Dr.A.Jagadeesh
1 Comments

This is wonderful news. Of course the quality of the products should be good enough. In our calculations, let us not forget that although LEDs have a long 50k hour lifespan, the drivers usually fail in about half that time. If they're built into the bulbs, that means the whole thing has to be discarded each time. There is no doubt, though, that even in such a situation there will still be a significant amount of saving for the end user.

7 Comments

Interesting article

By utkarsh
7 Comments

And I thought CFL were better than any other type of lighting. Thanks for the info.

7 Comments

While appreciating the idea of LED bulbs at subsidised rates,I caution on the misuse of Government Schemes without proper Check. A simple Box Type Solar Cooker in the past was provided Rs 150 out of cost of Rs 650 and in a vast country like ours there are only 6 lakh solar cookers sold but not all of them used. On the other hand bicycles which cost around Rs 2000, there are millions of bicycles in the country(which were never subsidised). Infact bicycle is the clean form of transportation.Nobody uses useless,unreliable things even if they are supplied free. In 80s under National Demonstration Scheme about 3500(in Andhra Pradesh 500)water pumping windmills were supplied free to Farmers(includig two for us). None of them worked beyond 3 months. Some of them were washed away in simple gale. It was costing Rs 20,000. A sturdy good water pumping windmill costs Rs 100,000 .
In Tamil Nadu Colour TVs were given free. Most of them were taken to neighbouring Andhra Pradesh. The same fate occurs for the Rs 10 LED bulbs. May be they travel the reverse way !
On the other hand I have innovative,simple and less gestation energy conservation methods which Government of India and different state Governments can implement.
I have had been advocating energy conservation since long. Apart from Energy generation from Renewables, Energy Saving is the need of the hour in India. A Novel Scheme to replace Old and inefficient agricultural pumpsets: Out of the 26 Million Agricultural pumpsets in the country many are old and inefficient. The power tariff for farmers is minimal. Electricity is a high grade energy which is needed in industries, domestic purposes, computers etc. A scheme can be chalked out to replace the inefficient motors by efficient ones. The cost of a 5 HP Electric motor because ts about Rs 20,000.A subsidy of Rs 15,000 can be provided to replace these inefficient motors.This yields quick results and “Energy conservation is better than energy generation”. Each Kwh saved is each Kwh generated (1 US$= Rs 60). There must be some contribution from the beneficiary otherwise he won’t take care of the system. Giving free leads to misuse. In 80s the then Department of Non-Conventioal Energy Sources(Now MNRE) under Demonstration Programme installed over 4000 Water Pumping Mills free of cost. In Andhra Pradesh about 500 were installed. At that time a windmill was costing Rs 20,000. A reliable windmill costs around Rs 80,000 at that time. Infact in our Filelds in Muthukur, Nellore District, Andhra Pradesh 2 Wind mills were installed. None of the windmills worked and vanished in no time. Based on several studies carried out on agricultural pumpset efficiency, it has been found that the pump efficiency varies from 25-35% due to various factors. By adopting BEE star lebelled agricultural pumpsets, the efficiency can be enhanced upto 50-52%. It is estimated that, by replacement of existing pumps with the BEE star labelled pumps, the achievable saving potential is 30-40% and sectoral saving potential works out to be 4.34 BU per year. Instead of huge investment on New Power projects, The Government of India and different state Governments can jointly plan a scheme to replace the existing old and inefficient agricultural pumpsets with efficient ones. This yields quick results. Energy conservation refers to reducing energy consumption through using less of an energy service. Energy conservation differs from efficient energy use, which refers to using less energy for a constant service. For example, driving less is an example of energy conservation. Driving the same amount with a higher mileage vehicle is an example of energy efficiency. Energy conservation and efficiency are both energy reduction techniques. Even though energy conservation reduces energy services, it can result in increased, environmental quality, national security, and personal financial security. It is at the top of the sustainable energy hierarchy. One of the primary ways to improve energy conservation in buildings is to use an energy audit. An energy audit is an inspection and analysis of energy use and flows for energy conservation in a building, process or system to reduce the amount of energy input into the system without negatively affecting the output(s). This is normally accomplished by trained professionals and can be part of some of the national programs discussed above. In addition, recent development of smartphone apps enable homeowners to complete relatively sophisticated energy audits themselves. Building technologies and smart meters can allow energy users, business and residential, to see graphically the impact their energy use can have in their workplace or homes. Advanced real-time energy metering is able to help people save energy by their actions. Elements of passive solar design, shown in a direct gain application. In passive solar building design, windows, walls, and floors are made to collect, store, and distribute solar energy in the form of heat in the winter and reject solar heat in the summer. This is called passive solar design or climatic design because, unlike active solar heating systems, it doesn't involve the use of mechanical and electrical devices. The key to designing a passive solar building is to best take advantage of the local climate. Elements to be considered include window placement and glazing type, thermal insulation, thermal mass, and shading. Passive solar design techniques can be applied most easily to new buildings, but existing buildings can be retrofitted. Energy Saving in Lighting. One innovation that saves enormous power in light is READING SOLAR LIGHT dual powered. Normally in India students read under a 40 Watt Fluorescent bulb. In school and college hostels one Fluorescent bulb for 4 to 6 people. A Fluorescent bulb consumes 40 Watts. Its life time is short. In voltage fluctuations (common in some cases in rural India), it won't glow. There are Reading Solar lights with LED (Best LED from a Company like Nichia corporation, Japan) which can be charged by sunlight or electric including USB. This lasts 8 hours. It costs around Rs 400(about 7 US$) in India. It consumes 0.2 Watts. Moreover by this light one can concentrate on the material reading (especially students) we used to have Reading lights in the past (Table Lights electric). In suggest Schools, NGOs, Government can promote these on a massive scale. Each Kwh saved is each Kwh generated. TODAY’S WASTAGE IS TOMORROW’S SHORTAGE. please save the power for the next hour! Save power, energize the future.
Energy Conservation in Agricultural Pumpsets
 Considerable losses in the exit side of electric pump sets.
 A low angled (10 degrees) cone metallic, 1 foot long fitted at the exit of the delivery pipe.
 5% energy saving has been found .
In India about 2.6 crore electric pumpsets in operation in addition to 60 lakhs of diesel sets.
Most of the size of the pipe and pumpset for bore wells is desined uniformly (around 3 x 3 inch). Some mismatch between suction and delivery exists in many cases.Water table varies from place to place. There are Entry losses and Exit losses. In the normal operation . One can’t have control on entry losses but can on exit losses. Since area is confined at the delivery side(Exit) of the pipe,pumped water comes and stays for a while and as such back pressure develops. In order to drive it forward,more power is needed. One way to reduce this to have wider diameter pipe. When the water level goes down in summer it won’t suck. Without disturbing the existing system,how best we can conserve electricity. A 1 foot long and 10 degrees(low angled) divergent cone is attached at the exit side. Water grazes the cone and freely falls since the mouth is wide. Experiments with and without cone proves that there is a saving of 5& of power. The cone can be metallic and can be fabricated locally which costs about Rs 2000 . Enormous power can be saved by this simple device.

Micro Hydro Device for Low Heads

 At the Electric pumpset site a tank of length 2 m, width 1m and height 1 m is a common sight in Andhra Pradesh.
 Can’t this head be utilized ?
 From the outlet the water flows by gravitation
only.
 A micro hydro generator with a pelton wheel, a low RPM generator and pulleys are fixed to a stand.
 A diode to arrest the reverse flow of current is included.
 The unit costs about Rs 6000(about US $ 100) and can be fabricated locally.
 The unit can be utilized to charge about 3 lead acid car batteries (12 Volts)in parallel.
In some cases water is directly pumped from borewells. After falling the water goes on natural gravitation. The devce can be put at the delivery sde and power can be generated which can be stored in batteries. The same thing applies to Diesel pumpset also.
Passive Cooling by Clay Covers
Much of the heat in a house comes from roof. On flat roofs Clay covers(normally used on Clay pots) are arranged and fixed to the surface by mud. They are quoted with white calcium. The white colour reflects and heat has to pass through thick cover and then still air beneath the clay cover. A reduction of 5 degrees Celsius can be achieved by ths arrangement. Another simple method for small rofs(Houses) is to spread a polyethylene sheet on the roof with a thin layer of soil and growing fast growing horizontal root plants like coriander and other leafy vegetables. The temperature inside the house will be reduced by about 5 degrees Celsius. During rainy season,the polyethylene sheet can be rolled back.
Energy Saving in Lighting.
One innovation that saves enormous power in light is READING SOLAR LIGHT dual powered. Normally in India students read under a 40 Watt Fluorescent bulb. In school and college hostels one Fluorescent bulb for 4 to 6 people. A Fluorescent bulb consumes 40 Watts. Its life time is short. In voltage fluctuations (common in some cases in rural India), it won't glow. There are Reading Solar lights with LED (Best LED from a Company like Nichia corporation, Japan) which can be charged by sunlight or electric including USB. This lasts 8 hours. It costs around Rs 400(about 7 US$) in India. It consumes 0.2 Watts. Moreover by this light one can concentrate on the material reading (especially students) we used to have Reading lights in the past (Table Lights electric).
In suggest Schools, NGOs, Government can promote these on a massive scale.

Though AP Government some time back announced replacement of Inefficient agricultural pumpsets,nothing heard after that and no action initiated. I suggest it should be a Central and State Governments venture ,then alone it can be carried out on a large scale.
Each Kwh saved is each Kwh generated.

TODAY’S WASTAGE IS TOMORROW’S SHORTAGE.

please save the power for the next hour!

Save power, energize the future.

Dr.A.Jagadeesh Nellore(AP),India
Renewable Energy Expert

By Dr.A.Jagadeesh
7 Comments

Could you please take the speculative element out by using CAG report http://ow.ly/D50mu in your next story please?

By Prof. J. George
3 Comments

Very interesting analysis about the role of water in the recently concluded Maharashtra assembly election. However, to take the conjecture out rural and urban constituencies need to be separated out. While it is rural areas that account for a major share of the consumptive water use, the Non-revenue water (NRW) attains significance in urban areas. The story line by assuming interchangeability between the two confuses the issue of water. Besides, water recharge in urban areas do not find any mention while millions seems to have been expended under various public schemes.

Certainly, issues partaining to water must always be linked to agriculture crop selection and hence mention of Onions becomes a must. Perhaps the next story line could be devoted to this issue.

By Prof. J. George
3 Comments

Telugu Ganga,Galeru-Nagari,Handri-Neeva and Velugonda
projects in Rayalaseema and Kalwakurthi,Nettempadu,Bhima
and Koilsagar lift irrigation projects in Telangana are
being constructed depending up on the flood waters of the
river Krishna.So these projects are not eligible to get
National project status.Polavaram project is being constructed with allotted waters of the river Godavari. By
Polavaram project 7 lakh acres of land could be irrigated
by gravity canals.The 960 MW of power produced by Polavaram project is sufficient for the lift irrigation projects proposed under this project as they require water to be lifted below 500 feet height.On the other hand Pranahita-Chevella and Devadula lift irrigation projects which are going to irrigate 22 lakh acres of land in Telangana require water to be lifted 1500 feet height from the river Godavari and need 4000 MW of power to run these lift irrigation projects.So the government has to spend Rs 5000 crores annually for power to run these 2 lift irrigation projects.So Polavaram project is the most economical project among all the projects of Jala Yagnam.

By m.s.murthy
29 Comments
October 21, 2014 | The myth of green building

Dear All,

It's very very IMPORTANT and it is not limited to only in case of Buildings alone. Rather it is applicable in all aspects of our day to day life even.

Most IMPORTANT aspect is whether WE know about what GREEN means .......

Need of the hour is to study on WHAT is all about 'GREEN' (in reality but not the myth )

Thanking All.
Regards.
Nripendra Kumar Sarma
Nagaon, Assam, India

By Nripendra Kumar Sarma
13 Comments

I doubt it is a real victory to BJP.

If we look at votes polled percentage: in Haryana BJP got 33.2%, Congress got 20.6%, INLD got 24.1%. That means Congress + INLD together got 44.7%, which is more than BJP vote share by 11.5%.

In the case of Maharashtra: BJP got 27.8%, Congress got 17.9%, NCP got 17.3. That means Congress NCP together got 35.2%, which is higher than BJP share by 7.4%.

This vote share clearly reflect that it is not vote for Modi but vote against corruption in those two states.

Dr. S. Jeevananda Reddy

By Dr. S. Jeevananda Reddy
3 Comments
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