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From Green Building Talk Getting Into Hot Water: Solar Water Heating Pays For Itself Five Times Over An analysis of the engineering and economics for a solar water-heating system shows it to have a payback period of just two years, according to researchers in India. They report, in the International Journal of Global Energy Issues, on the success of the 1000-liter system operating at a university hostel. The current focus in the developed world is on advanced technological approaches to alternative energy sources, such as photovoltaic cells for solar power and harnessing wind and wave with elaborate systems to generate electricity. However, the cost of such systems may be prohibitive for some applications in the developing world. They also often ignore the fact that a mundane process such as heating water might best be carried out using direct heat from the sun rather than including a waste energy-conversion step. … Read the rest at GreenBuildingTalk.com

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From Associated Construction Publications Construction Jobs Decrease by 104,000 in February Construction employment fell by 104,000 in February with losses throughout the sector. This industry has shed 904,000 jobs since the recession began, with about half of the decline occurring in the past 4 months, according to testimony by Keith Hall, commissioner, Bureau of Labor Statistics, before the Joint Congressional Economic Committee today. Although the stimulus package is expected to positively affect construction employment through “shovel-ready” projects, none of that has started yet. The decline in construction employment mirrors declines in the rest of the labor market as the sharp and widespread contraction continued in February. Nonfarm payroll employment fell by 651,000, following declines of 681,000 in December and 655,000 in January. Since the recession began in December 2007, job losses have totaled 4.4 million, well more than half of which occurred in the past 4 months. In February, the unemployment rate climbed from 7.6 to 8.1 percent, the highest rate in over 25 years. … Read the rest at Associated Construction Publications

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