"If you use a diesel generator, it will cost you Rs 24-25 per unit if it is running at full power, and if it is running at half the power, it can go up to Rs 35"
I have a solar system which is very convenient during power cuts. The subsidies from Centre and State totalled almost 50%. It would be justified if the EB took the excess electricity from systems like mine without paying for it, provided they don't cause any inconvenience or damage. But what would be still better is if the solar power could all be directly sent to the grid as in the U.K. and U.S.. Then batteries would not be needed. But for this the supply from the grid should be more reliable than it is now in India (I don't know about Gujarat).
What an Utopian idea! According to the professor, you may use three lights, two fans and a mobile charger. Now, who will ensure that only three lights, two fans and a mobile charger are switched ON, other loads are OFF? Will the Govt. post a policeman at every household to check this and prevent people from switching ON the fourth light? And the fans should be DC? Initial cost will be higher, maintenance also will increase because the brush on the commutator will have to be adjusted at intervals. Do you remember the DC fans in the train compartments -after switching ON, you have to climb on the seat with a comb for the fan to start?
Re: What an Utopian idea!
by R Chakravarti on Jun 13, 2014 05:06 PM
At the beginning he mentions brushless DC motors. Overloading can be prevented by a suitable device. You wrote this comment without reading the item carefully or thinking.
Whether solar electricity generated from goes to grid by AC or DC line? If this is also done then homes will be rather supplier of electricity then consumer.
Re: What about grid connection to solar panel at home?
by guptaapsn on Jun 13, 2014 03:43 PM
There you are. So far many governments are promising to allow grid connection. No govt. implemented so far. If grid connection is implemented, each and every home will become power generation company. Agreement 123 will goes to dust bin.
Re: Re: What about grid connection to solar panel at home?
by niyama on Jun 13, 2014 04:26 PM
Hasn't Gujarat government implemented grid connected rooftop?
gpclindia link says Gujarat implemented Gandhinagar Solar Rooftop Solar PV project in 2010-11.
Re: Re: Re: What about grid connection to solar panel at home?
by guptaapsn on Jun 13, 2014 04:30 PM
I don't think Gujarat is in India. Is every state will become Gujarat and every CM will become NAMO, there is no need of this article and comments.
we had been too poor and now many of us can conveniently afford power bill, so do not bother when electricity is being getting wasted... little care and small sacrifice by not using electrical appliances for about an hour could make huge difference...
It is a good idea. AC used domestically is more fatal than DC. AC attracts the person and the DC repels. DC at 48 volts is considered very safe. The motors need to be of AC. (like agricultural pumps, motors for machines) because they need to be brushless. Brushless DC motors are expensive and difficult to design. To prevent trasmission losses, AC is required.
Re: DC or AC ?
by Vascoda gama on Jun 13, 2014 04:02 PM
No. You cannot say like that. I mean DC is less fatal than AC.
Suppose if you consider 100Watt(Volt-Ampere) DC power and a 100VA(Volt- Ampere x powerfactor) AC powersource, Believe me, DC will simple kill while AC does not. AC will shock you so that you remove your hand from source.
This is because, AC is sinusoidal therefore the Average power experienced by your body for some duration is ZERO(integrate sine wave between 0 to 2PI radian to get zero).
Where as DC is NON ZERO. therefore DC is fatal when compare to AC however, note that we need to give the appropriate numbers when we talk about strengths.
Re: Re: DC or AC ?
by niyama on Jun 13, 2014 04:30 PM
Though both AC and DC currents and shock are lethal, more DC current is required to have the same effect as AC current. For example, if you are being electrocuted or shocked 0.5 to 1.5 milliamps of AC 60 Hz current is required and up to 4 mA of DC current is required.
Re: Re: DC or AC ?
by niyama on Jun 13, 2014 04:30 PM
Though both AC and DC currents and shock are lethal, more DC current is required to have the same effect as AC current.
If 48V DC is available, then you can quickly connect a 3KW inverter to that line and still use most of the AC appliances during blackout. Why change all the appliances at home. Home Inverters are 95% efficient these days.
Re: 48V DC line connection
by niyama on Jun 13, 2014 03:29 PM
Why do we need so many inverters? We can have one inverter generating all types of DC voltages and points for different volatage levels.
Re: 48V DC line connection
by R Chakravarti on Jun 13, 2014 05:18 PM
Franklin's suggestion would defeat the purpose of the DC supply and make it collapse.
Our country is a power mess because: We use outdated technology for generating and power distribution
Enough privatization in the power sector hasn't happened because
Politicians would like still woo voters using free power to farmers promises
We haven't leveraged fully the natural non conventional methods of power generations
Our homes and offices aren't designed in the correct way. You will notice that all IT organizations during afternoon summers work with all the lights switched on. Imagine in part of the city 10 buildings with 10 floors each are using lights day and night how much of electricity is getting wasted. Why can't we have buildings that use minimum lights and are designed in such a manner to ensure lots of natural lights brightness the offices.
Please consider the above to save electricity. AN APPEAL TO IIT CIVIL DEPT.
Re: Power Wastage
by R Chakravarti on Jun 13, 2014 09:32 PM
It should be mandatory for such buildings to use the maximum possible amount of solar energy.
