Affordable solar power?

[niky]

Actually, a nice power-saving project would be modifying the school buildings to use less power in the first place... creative use of cooling towers, plumbing layouts, and window designs (for light).

[kinyo]

its a good project pup2 ... in the near future, we could experience energy rationing again, though not as bad as early 90's, because our energy production is approaching a bleak outlook due to not enough power plants, if any, are being built ... when that time comes, you will be smiling

[lolo pepe]

Kaya siya 2000 watts kasi yun yung output nung circuit na naka-kabit sa gen set namin noong panahon ng brownout. It's smallish pa kasi experiment pa nga lang. I want to see any downsides to the project, if ever.

Pero kahit 2000 watts lang yun, dahil malakas ang gamit (essential system nga eh), it operates NLT 10 hours a day kaya in 1 month, that's 2000x10x30 wh (60 kwh). I don't remember the cost I used for Napocor but I remember just dividing the Kwh figure by the total bill para kasama na lahat ng taxes, distribution charge, etc.

Take note though -- commercial establishment ito kaya mas mataas ang rate kesa sa households dahil sa commercial establishments yata galing ang lifeline subsidies. Hindi ko kinompute using households as a basis eh.

Solar doesn't cost anything after installation -- yung replacement lang ng baterya every 2-3 years or so. If I remember correctly, I also put that in to my analysis. Thing is, mahaba ang payback niya kaso since 20 years naman ang warranty nung solar panels, huwag lang maaksidente OK na.

I also took note that our power increases in price by around 10% every year. While the cost of the panels decreases by more than that every year. So talagang eventually, only the large initial cost will be a hindrance. Hinihintay ko sana magka-subsidy ito pero mukhang wala pang liwanag sa gov't kaya mauuna na me! harharhar!

i think this should be 600 KWH.

[pup2]

i think this should be 600 KWH.

Ay oo nga! hahaha. Tinamad kasi me magcalculator eh. haha.Anyhow, I found my old study! 2004 pa pala siya and assumes almost 7 pesos per Kwh meralco cost, price increases of 11%+ for meralco annually (which was the true average from 2001-2004), and 2000 watts full usage for 12 hours per day and battery replacement every 3 years. Ina-update ko lang before I sit down with the contractor(s).Hindi na puwede mag start from scratch eh. Matagal na nakatayo ang buildings at super mahal naman kung start from scratch. Kaka recertify nga lang nung structural nun eh.Actually, kahit naman hindi magka-shortage, sa mahal ng kuryente, sure na akong positive ang NPV nito -- kina-calculate ko lang kung magkano ang worth at kung ano ang hidden downsides kaya experiment pa lang. Of course, RE pa ito at may educational value in and of itself.

[beachbum]

question lang po sa mga expert sa solar energy. if you install a system that provides a certain amount of power, do you design it for maximum illumination or minimum illumination of the sun?

can the system provide the expected amount of power even during overcast skies or continuous or prolonged raining?

more or less, what is the power generated per square foot of solar panel? for those who have limited space.

thanks in advance.

[boybi]

May natanungan ako dati, parang 15W lang or less ang power produced ng 1sq. ft. of solar panel.

[Negus]

yup, its around 15W or less. hindi pa kasama dun yung nominal operating conditions, so it will drop to about 12W due to temperature coefficient. yung iba minamaximize nila yung heat ng solar cell to heat water by running pipes through the them. this also helps lowering the temperature of the solar cells a bit and in turn increase the effectivity.

You also need a Maximum power point tracker (MPPT) because resistive/impedance loading like batteries, charge controllers, etc messes up the Current Voltage output (Power) ng solar panel. kumbaga impedance matching para laging maximum power ang laging natatanggap. para siyang DC-to-DC Converter.

Others use solar trackers, yung automatic in-oorient yung solar panels to the sun by use of DC motors para maximised yung illumination ng sun. but you need a large space for this. Actually, you can just position the solar panel 15degrees to the east west coordinate (the philippines is below 15 degrees below the equator) para sagap niya yung path nung sun. but you still need to consider the seasons (the sun's path changes throughout the year)

medyo marami-rami din ang kailangan to make the system more efficient. kelangan mabusisis yung planning at design to get your money's worth. Sir, pup have you considered the ageing effects nung solar cells? humihina din kasi yung solar cells in the span of its usable lifespan.

[theveed]

I remembered playing Sim City before with solar power plants, laging nagblablackout yung malayong part ng city pag cloudy hehehe.

[pup2]

yup, its around 15W or less. hindi pa kasama dun yung nominal operating conditions, so it will drop to about 12W due to temperature coefficient. yung iba minamaximize nila yung heat ng solar cell to heat water by running pipes through the them. this also helps lowering the temperature of the solar cells a bit and in turn increase the effectivity.

You also need a Maximum power point tracker (MPPT) because resistive/impedance loading like batteries, charge controllers, etc messes up the Current Voltage output (Power) ng solar panel. kumbaga impedance matching para laging maximum power ang laging natatanggap. para siyang DC-to-DC Converter.

Others use solar trackers, yung automatic in-oorient yung solar panels to the sun by use of DC motors para maximised yung illumination ng sun. but you need a large space for this. Actually, you can just position the solar panel 15degrees to the east west coordinate (the philippines is below 15 degrees below the equator) para sagap niya yung path nung sun. but you still need to consider the seasons (the sun's path changes throughout the year)

medyo marami-rami din ang kailangan to make the system more efficient. kelangan mabusisis yung planning at design to get your money's worth. Sir, pup have you considered the ageing effects nung solar cells? humihina din kasi yung solar cells in the span of its usable lifespan.

Ageing? Good point in addition to cleaning. Hindi ko alam yun but I'll make sure to ask now that I know about it! hehehe. Kaya ko nga inopen ang thread eh.

Since yung circuit naka double throw meralco/gen set na ngayon ay meralco/solar, di naman super problems ang brownout gaya sa sims ... huwag lang madalas.

[Negus]

Revolutionary solar energy?

One of the largest inhibitors to cheap solar power has always been the high cost of solar panels (due to their thick glass, framing, and expensive silicon). San Jose-based Nanosolar, Inc. appears ready to eliminate these barriers with solar technology that utilizes thin sheets of non-silicon components that reduce the production costs by over 90% and decreases the thickness by 99% (the Nanosolar PowerSheets are thin enough to be rolled up).

Unlike many other solar companies, Nanosolar has already built a massive manufacturing plant and intends to deliver its first solar sheets to European customers in 2008 at a price that will put solar power at or below the per watt price of fossil fuel-based energy. The company claims that the technology is so versatile that they could be incorporated into roofing shingles or even rolled onto the top of cars or trucks.

POPULAR SCIENCE's 2007 INNOVATION OF THE YEAR AWARD:
http://www.popsci.com/popsci/flat/bo...n/item_59.html

Sir pup, kumusta na project niyo?

[bomboklat]

try nyo sa raon may ace electronics dun nagbebenta ng solar panel at windmill

[Flagg]

Would it be better kung windmill nalang?

[pup2]

Update ko lang ito. My project went on the back shelf again. Pinuntahan naman talaga ako nung taga Benpres yata yun (?) na kausap ko. Tama naman lahat ng calculation -- kaya lang, I found out na yung stated output nung solar panel ay hindi pala sustained! Siguro kaya madalas ma-brownout yung mga iba diyan.

Apparently, ang stated output ng mga panels ay parang yung sa speakers dati -- nakalagay mataas pero peak lang pala ito -- parang PMPO ng speakers. Ang sustained output ay parang 20-30% lang nung stated output.

Dahil doon, hindi naging feasible ang project. Sabi ko titignan ko na lang uli in about 5 years.

For the meantime, we replaced all bulbs with CFLs, replaced all old fluorescent lights with electronic ballasts, installed "kisame" on all AC rooms, made sure no AC's are underpowered, and made a point to assess all appliances 5 years old or older pag nasisira kung worth it pa ipagawa o palitan na lang ng more energy efficient ones -- ayos naman medyo malaki din natipid.

I was hoping for more pero siguro for next year na yun.

[niky]

By the bye... just a reminder.

When your CFLs wear out, be sure to bring them to a recycler... they contain mercury, just like regular flourescents, and shouldn't be disposed of or broken up in the regular trash, as that'll contaminate the ground water in your area...

[pup2]

OOh. Good tip. Sana nabebenta din yung used bulbs and fluorescents. I'm sure our ilokana maid will collect them.

[angelsmile]

Saan at kanino makakabili niyan? I'm planning to have one kasi.. masyadong mahal na ang kuryente ngayon, mabuti na medyo makakatipid.

[pup2]

Saan at kanino makakabili niyan? I'm planning to have one kasi.. masyadong mahal na ang kuryente ngayon, mabuti na medyo makakatipid.

Ano po yun? Solar panels? EBallasts o CFLs?

[johnedricma]

Saan at kanino makakabili niyan? I'm planning to have one kasi.. masyadong mahal na ang kuryente ngayon, mabuti na medyo makakatipid.

Meron akong na browse sa
ttp://www.rhidalgohardware.com/ sa raon yata, mura dito ayon sa kanila...

[feedback]

Meron akong na browse sa
http://www.rhidalgohardware.com/ sa raon yata, mura dito ayon sa kanila...

got a set of 100 watts solar power kit from them last month. It works really great. yeah mas mura nga sa kanila, bilis pang kausap. Sa santolan sila, same street ng cmap crame

[C#@RD]

found this site they have solar kit packages.

http://g3escullar.com/g3escullar-cor...d=75&Itemid=98