Saturday November 29, 2014 07:04
Monday December 8, 2014 14:16
Construction, installation, maintenance and decommissiing parts to a project .
Monday December 8, 2014 14:16
1'System Autonomy' definition?
2 Erratic solar charging reduce battery life?
3 What inverter used Wattbox with UTR-020?
4 Tracking rack?
5 Wattbox rough cost?
6 Damping cylinder purpose?
Question answers 12/8/14.
Read enough below? 750 W modified sine wave inverter returned to Harbor Freight.
But KillAWatt installed!Power output of solar erratic charged battery systems likely accurately
Initial measurements 12/0714.
Ice dispenser drew 40 W.
reported by Zomeworks Integrated Systems.
270W, 100 Ah@ 24V; 7.08kw, 6000 Ah@ 24V, 600w (cont); 1.88kw,150W (cont), 1500 Ah @ 24V;
920W, 150W (cont), 1500 Ah @ 24V.
Harbor Freight test system: 15W works surprisingly well with HQRP charge/load controller with 12V 35Ah AGM battery and modified sine wave inverters.
Small-scale solar works. But large-scale solar may be a scam/fraud?
Oil/gas well monitoring solar/battery systems visible.
Solar/battery powered refrigerator?
In 1/3 Hp, the running wattage is 250 watts. The starting wattage is about 1,750 watts.
In 1/4 Hp compressor, the running wattage is 190 watts The starting wattage is about 1,300 watts
Solar powered refrigerator/freezer project looks more promising!
I've run everything from motors to "sensitive" medical equipment on modified sine, the only difference between the two is that modified sine wastes more power in the equipment being run. But seeing as how I've run most industrial equipment on modified sine with no problems for days on end I think it's just marketing bull.
most all motors, and things that use transformers and relay coils like pure sine wave, if you power them with modified sine, they will run hotter than they would otherwise on pure sine and if you feed them with square wave, they will run much hotter
having said that, most appliances seem to tolerate the added heat from what i can tell, but i would expect any appliance that is marginally engineered to suffer some longevity if not provided with pure sine wave power.
having read on here and various other forums relating to offgrid life, folks get very anal about a few milliamps here and there but pay no mind to the inverter that they use, mainly because the advertised efficiency of a modified sine/square wave inverter is usually quite high and in some cases equal too or surpassing the pure sine wave inverter, but
folks don't consider what the added heat represents in the motor or transformer loads, that heat relates to added losses it takes power to make heat.
the thing is, a pure sine wave inverter is likely more efficient overall powering a specific motor load even if it is listed at 90% vs a modified sine wave that might be listed at 92-93%, the added efficiency is eaten up as heating in the motor load, leaving the overall efficiency likely much lower than the pure sine inverter listed efficiency.
to me the better discussion might include an analysis of this phenomenon, where folks get all knotted up chasing down a few tenths of an amp and then burn several extra amps making heat with a modified sine inverter driving a motor load like a refrigerator?
i suspect that there is much more to be said for buying the pure sine wave if possible to start with, the appliances "might" last longer, and the system overall efficiency will likely be higher as well.
over time, maybe not a very long time either, the added cost might quickly pay off?
btw, the only things i have heard of damaged by modified sine and especially square wave inverters are smart chargers for portable tools and some cellphone chargers. i have seen a few of each burnt up using modified sine inverters.
[Burned up Harbor Freight smart 18V charger and float charger.] ...
Things that have switch mode supplies in them should be perfectly fine, and may even be slightly more efficient than if run from true sine, depending on the design. Purely resistive loads are no problem. Devices with 'universal' motors in them should not be a problem either, although the sharp edges might cause a little bit of hysteresis heating, but not enough to worry about.
as to what bill said here, "You can also look at the VA and Watts consumed on Grid Power and MSW and if either goes up a lot on MSW (say +20% or higher vs grid power), then the heat has to go somewhere (usually heating components).", do not think if the % is under 20% that you are ok or safe. extra power being dissipated is extra heat being generated and appliances, parts, etc. can all react differently depending on design, quality, specs, etc. even one item that has more metal to heat sink the extra power or more ventilation may outlast another that has the exact same makeup otherwise.
there's no definitive answer and msw will not operate optimally in comparison to sine wave ac for certain unless it is a resistive load. in other words, it will be worse than sine wave, but will vary in its degree of being worse with the exception of resistive type loads.
Friday December 5, 2014 06:54
The U.S. Energy Information Administrations U.S. Crude Oil and Natural Gas Proved Reserves, 2013 released today found U.S. total natural gas proved reserves increased 10% in 2013 and reached a new U.S. record of 354 Tcf. Within that record growth the EIA found Pennsylvania had the largest increase, and when coupled with West Virginia the two states which lay atop of the Marcellus Shale account for 70% of the increase in natural gas proved reserves demonstrating how transformational the Marcellus has become in just a few short years.
Thursday December 4, 2014 15:32
Saudi Arabia slashed its oil prices for Asian and U.S. buyers on Thursday, in a move some analysts said shows it is stepping up its battle for market share a week after refusing to support OPEC output cuts. ...
OPEC sources have said Saudi Oil Minister Ali al-Naimi told the OPEC ministerial meeting behind closed doors that OPEC should defend its market share, because production cuts would only boost rival producers, including U.S. shale oil companies.
Fracking, mining pollution and solar.
animas river pollution.
Wednesday December 3, 2014 16:01
Crude sold at the wellhead in the Bakken shale region in North Dakota fell to $49.69 a barrel on Nov. 28, according to the marketing arm of Plains All America (PAA) Pipeline LP. That's down 47 percent from this year's peak in June, and 29 percent less than the $70.15 paid for Brent, the global benchmark. ...
"Places that are just starting to build up are going to be hit the worst," Larry said by phone. "They're going to get hit the hardest because it's harder to get the oil out. Not out of ground, but out of the area."
Tuesday December 2, 2014 21:10
The Tulsa company and CEO Rick Muncrief have vowed to get out of Marcellus wells since announcing their long-term strategy in October. The strategy will focus drilling operations in three areas the Piceance Basin in Colorado, the San Juan Basin in New Mexico and the Williston Basin in North Dakota.
Morningstar's price deck is composed of three years of current crude-oil strip pricing followed by our midcycle price estimate of $90/bbl, which we still believe reflects the marginal cost of North American shale production.
These U.S. oil producers have the most to lose.
Naimi declares price war on U.S. shale oil, a Reuters headline shouted, referring to Saudi Arabia Oil Minister Ali al-Naimi.
But there are at least three big problems with this strategy. One, North American crude isnt as expensive to produce as it used to be. Two, theres more than you think in the pipeline to make it even cheaper. And third, OPEC nations, including Saudi Arabia, have squandered their edge in cheap oil supplies on welfare states rulers cant easily cut back.
Saudi Arabia sent oil prices into a tailspin last week when it blocked efforts by smaller exporters in the Organization of the Petroleum Exporting Countries to curb output.
Frack Attack: America's fracking revolution adds $300 billion to $400 billion annually to U.S. economic activity, according to the Manhattan Institute. As much as $100 billion in related capital spending is at risk due to falling oil prices, according to The FT. If drilling activity stops (or even just slows) that will come at a cost to the thousands of Americans working in the energy sector, where average pay is 23% higher than the average private sector job, according to BTIG. In addition, less drilling will hurt all the non-energy businesses that have benefited from the fracking revolution.
Lee Gonzales tank lecture link.
Wednesday December 3, 2014 09:29
Immediate south of Lybrook, New Mexico and north of highway 550.
WPX energy and Aztec drilling fracking operation
Tank construction and installation surely paid by investors? loans? WPX?
Who pays for decommissioning these tanks?
Fracking gas and oil wells deplete quickly.
Revenue from energy sales sufficient to cover tank decommissioning cost?
Immediately south of tanks.
Outskirts of Aztec, New Mexico close to WPX buildings but on north side of 550.
Environmental remediation from mining contamination trip from Durango, to Ouray, Telluride, Rice, Dolores, Mancos and return.
Durango Mountain Resort.
Newmount Mining has misfortune to own the Idarado mine, have money and attracted the attention of the environmentalists.
Of the more than 100 historic mines most are out of business but continue to pollute.
So who pays for cleanup? The taxpayers?
Idarado mill just outside of Telluride.
1 WPX energy Aztec New Mexico buildings video.
2 Durango Colorago arrival.
3 Molas pass is between Durango and Silverton.
4 To Silverton 1.
5 To Silverton 2.
3 Ouside Ouray 1.
4 Ouside Ouray 2.
7 Lunch in Telluride. mp4 Tracfrone Android L39C converted to wmv with Koyote.
8 Idarado mill tailiings.
1 yd3 crusher fines weighs 3.000 pounds.
1 yd3 water weighs 62.4*27 = 1,684.8 pounds.
9 To Idarado mill.
10 Sign on Idarado mill gate audio/video.
11 Mill tailings.
12 Rico Colorado.
238 mile essential non-gas-wasting Idarado environmental remediation in 2006 Honda CR-C 4WD
Shemiranat County is a county in Tehran Province in Iran. The capital of the county is Shemiran, which is part of the city of Tehran.
OPEC declared financial war on frackers Friday November 28, 2014
Solar powered refrigerator/freezer project resumes.Along with learning Android/Java!
750/1500 W modified sine wave inverter purchased from Harbor Freight on 09/07/14 for $38.51.
Project goal video.
Monday December 1, 2014 06:44
World oil prices are down 40 percent since June, largely on abundant supply. OPEC last week declined to cut production to raise prices. Brent crude fell as low as $67.53, its lowest since October 2009, before picking up to $69.80.Sunday November 30, 2014 20:30
Saudi Arabia's oil minister told fellow OPEC members they must combat the U.S. shale oil boom, arguing against cutting crude output in order to depress prices and undermine the profitability of North American producers.
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