Global Warming: No Need to Panic

Recently, Nobel Prize winner physicist Ivar Giaever publicly resigned from the American Physical Society (APS) with a letter that begins: "I did not renew because I cannot live with the [APS policy] statement: 'The evidence is incontrovertible: Global warming is occurring. If no mitigating actions are taken, significant disruptions in the Earth's physical and ecological systems, social systems, security and human health are likely to occur. We must reduce emissions of greenhouse gases beginning now.' In the APS it is OK to discuss whether the mass of the proton changes over time and how a multi-universe behaves, but the evidence of global warming is incontrovertible?"

A statement signed by 16 scientists such as William Kininmonth, former head of climate research at the Australian Bureau of Meteorology; Rodney Nichols, former president and CEO of the New York Academy of Sciences; William Happer, professor of physics, Princeton and others says: "...Speaking for many scientists and engineers who have looked carefully and independently at the science of climate, we have a message to any candidate for public office: There is no compelling scientific argument for drastic action to "decarbonize" the world's economy. Even if one accepts the inflated climate forecasts of the IPCC, aggressive greenhouse-gas control policies are not justified economically..."

In a subsequent letter, these scientists noted: "A premature global-scale transition from hydrocarbon fuels would require massive government intervention to support the deployment of more expensive energy technology. If there were economic advantages to investing in technology that depends on taxpayer support, companies like Beacon Power, Evergreen Solar, Solar Millenium, SpectraWatt, Solyndra, Ener1 and the Renewable Energy Development Corporation would be prospering instead of filing for bankruptcy in only the past few months.
The European experience with green technologies has also been discouraging. A study found that every new "green job" in Spain destroyed more than two existing jobs and diverted capital that would have created new jobs elsewhere in the economy. More recently, European governments have been cutting subsidies for expensive CO2-emissionless energy technologies, not what one would expect if such subsidies were stimulating otherwise languid economies. And as we pointed out in our op-ed, it is unlikely that there will be any environmental benefit from the reduced CO2 emissions associated with green technologies, which are based on the demonization of CO2."

LushLife® Power Strips Recall

The U.S. Consumer Product Safety Commission, in cooperation with The Container Store Inc., of Coppell, Texas, announced a voluntary recall of power strips made by Lush Life® due to fire hazard.
The recalled strips are brightly colored and have six outlets. Their model number is 8001-6.

Note that Lushlife® disputes these findings and claims their product meets applicable safety standards.

Converting Waste Heat to Electricity

A company called Nextreme Thermal Solutions, based in Durham, N.C developed a thermoelectric generator (eTEG) that converts heat directly to low-level electrical power. Their technology uses the Seebeck Effect in which the temperature difference between two metals creates an electrical potential difference. Their generator uses Linear Technology LTC 3108 ultralow voltage step-up converter and power manager chip and can produce voltages up to 5V at power level up to 1 mW on a temperature difference of 15 to 20°K (the temperature difference in Kelvin is the same as in Celsius). Higher temperature gradients will result in higher power. Such devices can be used to feed micropower wireless and battery-free sensors. Unfortunately, the eTEG power levels are not sufficient to increase efficiency of power supplies by recycling heat energy from heatsinks. Also unfortunately, the prices starting at about $500 make this technology cost-prohibitive for regular consumers and hobbyists. By the way, the thermoelectric effect has been known for almost two centuries since Thomas Johann Seebeck discovered that electrical current flows between two dissimilar metals which have different temperatures.

Energy Efficient TV with 0 Watt Standby Mode

Toshiba Corp is reportedly releasing a 32 inch (visual size) LCD TV model "Regza 32BE3" equipped with its so-called "Eco Chip." The Eco Chip consumption current is said to be as low as about 95μA. This chip is used to detect ON signals from the remote control after the TV is turned off. It cuts off the AC power entirely through a relay as if you an unplugged TV. As the result, the power consumption in standby mode is 0 watt. The relay and the sensor that receive signals from the remote are powered by a large storage capacitor. Unfortunately, the report does not state the size of this capacitor and what happens when you leave the TV off for a long time. I guess either the chip needs to turn on the relay and re-activate standby bias supply before the cap is discharged too low, or you would need to turn on the TV by hand if the cap is discharged. Also they did not state power consumtpion or internal power supply efficiency in active mode (I wonder if they use bridgeless PFC front end?) In any case, such a "zero power standby" circuit is cute, but it is nothing more than a marketing gimmick. Obviously, you need to charge the storage cap during on-mode of the TV set. Whatever energy you save in 0W standby mode you need to spend to put this energy into this cap.

More Troubles with Energy Efficient Bulbs

U.S. Consumer Product Safety Commission just announced a voluntary recall of LED night lights imported from China by Corvest Acquisition Inc. It was reported these LED lights can overheat, smolder, and melt which may cause burns to consumers. The affected part has model number SBD01 stamped on the back of the plastic base.

Portable Generator: How to Use it Safely

If you just bought a portable generator set (genset) in wake of approaching Irene hurricane, and don't have time to read the entire manual, here are some crucial things you need to know. This quick safety checklist can save your life and lives of everyone in your home.

• Portable generators produce carbon monoxide (CO). CO can kill in minutes. More than three hundreds people died in US during power outages from generator related CO poisonings. Therefore a portable generator can be run only outdoor with exhaust away from your home. EPA recommends to locate gensets at least 10 feet from the home You should also allow at least 2 feet of clearance on all sides of generator for adequate ventilation.
  


• Most commercial portables are not weather proof. They pose the risk of electrocution and shock when used during a rain. Therefore, cover your genset in advance since Irene hurricane will be accompanied with heavy rain. It is not recommended to run a genset during a rain. If you are absolutely positively need to use a portable generator during a rain, build an open canopy-like structure. Don’t’ touch a genset with wet hands.
  


• A portable generator should not be connected directly into your house wiring without a special two pole disconnect switch or an interlock, since otherwise you will be feeding electricity back into the utility lines. This would present a hazard for utility workers and your neighbors. Portables are intended to be connected to your appliances primarily via extension cords. If you did not get a chance to install a transfer switch, prepare heave duty outdoor-rated cords with sufficient length. These cords should be long enough to reach your appliances through the windows or open doors.

For general operation theory and selection information see this portable generator guide.
This post is not a professional or a legal advice- I assume no liability of any kind for the accuracy of the above information.

New Auto Gas Mileage Standards

President Obama recently unveiled a plan to sharply increase auto fuel economy. The proposal would require the companies to reach average fuel efficiency across their U.S. fleets of 54.5 miles per gallon by 2025. The good news this would lower US oil use by 2.2 million barrels a day over the next 15 years, and accordingly cut the amount of money flowing to OPEC. It would also cut more than 6 billion tons of carbon emissions during this period of time. The bad news is according to The Center for Automotive Research, this requirement cost about $6,700 extra per car. It is also absolutely obvious that in order to achieve such fuel efficiency, the automakers would have to make the cars much lighter. Lighter cars of course are less safe. In a head-on collision, a lighter car will always have larger change in velocity due to Conservation of Momentum law (see Hyperphysics Concepts). So, no matter what anyone tells you, new fuel economy standards will hurt vehicles safety simply due to the laws of physics, even though the new cars may meet National standards for car crash safety. The trick is, during the compliance tests the car is being crashed against a still wall. Properly designed lightweight cars can perfectly pass these tests and claim five-star safety rating. However, they will have an obvious disadvantage in real conditions if collided with heavier cars. If more fuel-efficient cars offer us, the consumers, a true advantage, why mandate it? Should not their production and sales be driven by the market forces?

Energy Savings Bulbs Fire Hazard

I wrote previously about potential mercury poisoning and UV radiation hazards related compact fluorescent lamp (CFL). Now it appears they may also present a fire hazard. The U.S. Consumer Product Safety Commission just announced a voluntary recall of some energy-saving light bulbs made by Telstar Products (d/b/a Sprint International Inc) due to fire hazard. The affected bulbs are rated between 18 and 40 watt and are sold in discount stores under the brand names Telstar and Electra. Remember, unlike incandescent bulbs, a CFL is not just a filament. It contains a small PCB with electronic circuit that converts 115VAC 60 Hz input voltage into high frequency AC that drives the lamp. And any electronic circuit, especially the one that contains high voltage transistors and electrolytic capacitors, may be a potential fire hazard. This is another reason to stock up old incandescent bulbs that may not be available in US beginning 2012.

Recall of Sanus Surge Protectors Due to Shock Hazard

Milestone AV Technologies LLC voluntary recalled all low-profile power conditioners (surge protectors) Sanus Elements model ELM205, which used to be sold by home theater dealers. It was reported that improper grounding of the case and inadequate insulation poses an electrical shock hazard to consumers. More info is available from U.S. Consumer Product Safety Commission.

EPA To Spend $1.2M for "Environmental Justice"

EPA just announced it seeks applicants for $1.2 Million in so-called Environmental Justice Grants. EPA website says that "Environmental justice means the fair treatment and meaningful involvement of all people, regardless of race or income, in the environmental decision-making process." Hmm. Don't we have democracy and equality? Is anyone in US deprived from the rights to take part in "decision-making process"?
EPA also states "Environmental contamination can lead to costly health risks and can discourage investments and development in low-income, minority, and indigenous communities disproportionately impacted by pollution". From what I read about it, previous studies by Centers for Disease Control shows no evidence that racial minorities experience higher exposure to environmental chemicals than whites on a national scale (see for example aei.org ). As for low-income communities, it was suggested that poor neighborhoods often grew up around existing refineries and chemical plants because the land was cheap. Similarly, new facilities could be built near poor neighborhoods because land there is cheaper. How would these EPA grants change the law of supply and demand in real estate? Of course, 1.2M is a drop in the bucket relative to billions of taxpayers dollars spent by our government. But, there is no doubt, the government has many more spending programs like that.