Enn Original News
Waste Heat Recovery: The Next Wave of Clean Tech
May 24, 2011 03:32 PM - Jason Gold, CEO, KGRA Energy, LP
The terms renewable energy and clean technology conjure up images of photovoltaic panels baking in the desert sun, wind turbines rotating lazily in the wind, and large dams generating hydro-power. However, there is another important and growing clean energy technology that the average consumer hasn't heard of yet: waste heat recovery. Waste heat recovery employs a process that has been around since the 1960s called the organic Rankine cycle (ORC), which easily integrates into existing manufacturing infrastructures. ORC units capture heat that is currently being released into the atmosphere and converts it into useable CO2-free electricity. This technology has a small footprint, approximately the size of a tractor trailer flatbed and interest in systems that use this energy generating skid is on the rise as companies look to maximize the efficiency of existing investments and infrastructures. The market for waste heat recovery is virtually limitless. According to researchers at University California Berkley, the U.S. currently consumes about 100 quadrillion BTUs of energy per year. However, between 55 and 60 quadrillion BTUs are currently vented into the atmosphere as waste heat. With ORC technology these emissions are harnessed on-site to generate useable CO2-free electricity that is fed directly back into a manufacturing process. Pulp and paper, lumber, refinery, cement and power plant operations are especially well-suited for waste heat recovery systems since they consume large amounts of electricity and maintain consistent waste heat streams with temperatures between 400° and 800°F.
Wood as Fuel
May 24, 2011 02:31 PM - Andy Soos, ENN
Wood fuel is wood used as fuel. The burning of wood is currently the largest use of energy derived from a solid fuel biomass. Wood fuel can be used for cooking and heating, and occasionally for fueling steam engines and steam turbines that generate electricity. The use of wood as a fuel source for heating is as old as civilization itself. Historically, it was limited in use only by the distribution of technology required to make a spark. Wood heat is still common throughout much of the world. Wood fuel, one of the oldest energy sources on the planet, could become the newest commodity market if it can overcome supply limits and green concerns as demand grows for renewable energy. Experts say that supply constraints are starting to put wood fuel into competition with the paper industry, in an uneasy reminder of existing tensions between the food industry and companies making biofuels from food crops.
May 24, 2011 08:11 AM - Andy Soos, ENN
The Friday before Memorial Day is "Don’t Fry Day", a time to remind people at the start of summer about the dangers from exposure to the sun’s harmful rays. Melanoma, the most serious form of skin cancer, is always a dangerous threat and is the most common cancer among young adults aged 25-29. The U.S. Environmental Protection Agency’s (EPA) SunWise program and the National Council on Skin Cancer Prevention have partnered to provide simple tips on protecting yourself that could save lives. Melanocytes are cells that produce the dark pigment, melanin, which is responsible for the color of skin. They predominantly occur in skin, but are also found in other parts of the body, including the bowel and the eye. Melanoma is a malignant tumor of melanocytes.
Namibia Wildlife Conservation
May 23, 2011 09:10 AM - David A Gabel, ENN
Namibia is a country in southern Africa which borders the Atlantic Ocean, just north of the nation of South Africa. The nation was a German Imperial protectorate from 1884 to the end of World War I, when the League of Nations gave South Africa the ruling authority. After a long struggle, Namibia achieved independence in 1990. This is a typical story for many south African nations, but what sets Namibia apart is its outstanding wildlife conservation programs. Using a community-based system, it has maintained a healthy native ecosystem which has seen sharp increases in its key wildlife populations.
Japanese Quake News
May 23, 2011 08:10 AM - Andy Soos, ENN
A new NASA and university study of the March 11, 2011, Japan earthquake that included researchers from NASA’s Jet Propulsion Laboratory, Pasadena, Calif., provides the most comprehensive look to date at how Earth moved that day, unleashing widespread destruction and a devastating tsunami. The study of the magnitude 9.0 Tohoku-Oki quake, led by researchers at the California Institute of Technology in Pasadena, and published online in the May 19 issue of Science Express, details the first large set of observational data from this rare megathrust earthquake event.
Worlds Between Stars
May 20, 2011 03:59 PM - Andy Soos, ENN
A planet, historically, is a celestial body orbiting a star or stellar remnant that is massive enough to be rounded by its own gravity, is not massive enough to cause thermonuclear fusion, and has cleared its neighboring region of planetesimals. Astronomers, including a NASA-funded team member, have discovered a new class of Jupiter-sized planets floating alone in the dark of space, away from the light of a star. The team believes these lone worlds were probably ejected from developing planetary systems. The discovery is based on a joint Japan-New Zealand survey that scanned the center of the Milky Way galaxy during 2006 and 2007, revealing evidence for up to 10 free-floating planets roughly the mass of Jupiter. The isolated orbs, also known as orphan planets, are difficult to spot, and had gone undetected until now. The new found planets are located at an average approximate distance of 10,000 to 20,000 light-years from Earth.
High Atmospheric CO2 Levels May Cause Mass Extinctions in the Oceans
May 19, 2011 09:20 AM - David A Gabel, ENN
One of the greatest causes of global climate change is the human emissions of greenhouse gases, specifically carbon dioxide (CO2). These emissions are released into the atmosphere, but much of it gets absorbed into the world's oceans. A new study, published in the Proceedings of the National Academy of Sciences, looked at prehistoric ocean sediment and found a disturbing trend. Periods of high CO2 concentrations have historically coincided with mass extinctions of marine organisms.
The Salty Seas of Earth
May 19, 2011 08:16 AM - Andy Soos, ENN
Final preparations are under way for the June 9 launch of the international Aquarius/SAC-D observatory. The mission's primary instrument, Aquarius, will study interactions between ocean circulation, the water cycle and climate by measuring ocean surface salinity. On average, seawater in the world's oceans has a salinity of about 3.5% (35 g/L). In addition to Aquarius, the observatory carries seven other instruments that will collect environmental data for a wide range of applications, including studies of natural hazards, air quality, land processes and epidemiology. Although the vast majority of seawater has a salinity of between 3.1% and 3.8%, seawater is not uniformly saline throughout the world. Where mixing occurs with fresh water runoff from river mouths or near melting glaciers, seawater can be substantially less saline. The most saline open sea is the Red Sea, where high rates of evaporation, low precipitation and river inflow, and confined circulation result in unusually salty water. The salinity in isolated bodies of water (for example, the Dead Sea) can be considerably greater still.
Heart Risk and Injury
May 18, 2011 07:54 AM - Andy Soos, ENN
Nitric Oxide, a gas that occurs naturally in the body, may do more than any prescription drug to prevent heart attack and stroke. Nitric Oxide is essential for healthy circulation. It helps dilate blood vessels, prevent blood clots and regulate blood pressure. It also helps inhibit the accumulation of dangerous arterial plaque. Nitric Oxide helps prevent heart disease and stroke in the following ways: blood vessels expansion and protecting the blood vessels smooth muscle tissue from harmful constriction. This allows the flexibility necessary for blood to circulate with less pressure. Exercise reduces the risk of a heart attack and protects the heart from injury if a heart attack does occur. For years, doctors have been trying to dissect how this second benefit of exercise works, with the aim of finding ways to protect the heart after a heart attack.
Ancient Hawaiian Farms
May 17, 2011 02:36 PM - Andy Soos, ENN
The original settlers of Polynesia migrated through South-East Asia and Indonesia across Melanesia, before settling the Polynesian islands beginning in 1000 BC. Hawaii was one of the last island groups to be settled. Archaeological evidence indicates the first Polynesians arrived in Hawaii from the Marquesas between 500 and 700 AD. Hawaii has often been thought of as an earthly paradise. Still people must live and eat. A pattern of earthen berms, spread across a northern peninsula of the big island of Hawaii, is providing archeologists with clues to exactly how residents farmed in paradise long before Europeans arrived at the islands.