26 Sep '12, 8pm

The hows and wherefores of drainline heat exchangers. @atwilson

The hows and wherefores of drainline heat exchangers. @atwilson

This simple system for recovering heat from wastewater makes a lot of sense—especially for families and commercial buildings that produce a lot of hot water. Power-Pipe drainline heat exchanger. Heat from the hot water going down the drain pipe is transferred to water passing through the smaller-diameter pipes. Click to enlarge Photo Credit: RenewABILITY Energy Over the past few weeks I’ve written about various strategies to produce hot water efficiently. We’ve seen that tankless water heaters are more efficient than storage water heaters (though are not without their drawbacks), and we’ve learned that heat-pump water heaters produce two to three times as much heat per unit of electricity consumed as electric water heaters that rely on electric resistance heat. But the unfortunate reality is that even with the most efficient methods of generating hot water, we still lose t...

Full article: http://www2.buildinggreen.com/blogs/drainline-heat-exchan...

Tweets

Never quite managed to use one of these - defin...

greenbuildingadvisor.com 27 Sep '12, 1pm

Over the past few weeks I’ve written about various strategies to produce hot water efficiently. We’ve seen that tankless w...

This week's Energy Solutions blog: new federal regs to require heat-pump water heaters:

This week's Energy Solutions blog: new federal ...

buildinggreen.com 19 Sep '12, 10pm

New federal regulations beginning in mid-April 2015 will require that larger electric water heaters be heat-pump models. I...

I just told @MartinHolladay to 'take a Heat Loa...

greenbuildingadvisor.com 27 Sep '12, 4am

Finding the right balance by Bronwyn Barry Helpful? 0 Sign in to vote I'm working on a remodel in Sunnyvale, California, j...

Our new featured restaurant has versatility to suit any mood or preference in terms of choice of cuisine.

Our new featured restaurant has versatility to ...

asiatatlerdining.com 27 Sep '12, 4am

For the adventurous, the buffet is a paradise, what with 33 food stations, each presenting a different cuisine. Mind-boggl...

Get ready for heat-pump water heaters - to beco...

greenbuildingadvisor.com 24 Sep '12, 3pm

Stop global whining! by curt kinder Helpful? 1 Sign in to vote I have installed a Smith/State/Whirlpool/Kenmore/Voltex/Cra...

Few states building steam on combined heat and power

Few states building steam on combined heat and ...

greenbiz.com 03 Oct '12, 2pm

For those who are unfamiliar with how CHP works, think of it like a mini power plant (“mini” is a relative term, as these ...

Will Higher Heat Content in Trash Help Waste-to-Energy Stocks?: Filed under: Energy News

Will Higher Heat Content in Trash Help Waste-to...

altenergystocks.com 29 Sep '12, 1pm

The US Energy Information Administration (EIA) recently published an article describing an increase in the energy content ...

Drum roll, please: Introducing the Resilient Design Institute! @ResilientDI @atwilson

Drum roll, please: Introducing the Resilient De...

buildinggreen.com 02 Oct '12, 5pm

Introducing the Resilient Design Institute: a new nonprofit organization that has been created in Brattleboro. A massive i...

#WCIT

ntia.doc.gov 26 Sep '12, 9pm

Although, as Secretary General Toure will tell you in his remarks this afternoon, the issues of ICANN and the governance o...

Waste Heat to Electricity Breakthrough

Waste Heat to Electricity Breakthrough

spectrum.ieee.org 19 Sep '12, 8pm

19 September 2012—When utilities burn fossil fuels to produce electricity, roughly two-thirds of the energy in the feedsto...

Good article by Alex Wilson of BuildingGreen on...

buildinggreen.com 08 Oct '12, 11pm

A few quick responses to some of these comments: Cathy, most of the advanced pellet boilers (like Froling and Tarm) are op...

Get Ready for Heat-Pump Water Heaters

greenbuildingadvisor.com 20 Sep '12, 1pm

While standard electric water heaters have no moving parts, heat-pump water heaters have compressors (to compress the refr...

Infrared human sensor measures body heat

electronicsweekly.com 23 Sep '12, 11pm

Omron Electronic Components has introduced a non-contact MEMS thermal sensor that it claims can detect the presence of hum...

Renewable Heat Incentive set to fire up domesti...

businessgreen.com 20 Sep '12, 12pm

The government has today launched long-awaited plans to offer financial incentives to homeowners installing renewable heat...

What simple measure can save as much as 12% annually on your energy bill? Let us enlighten you:

What simple measure can save as much as 12% ann...

resnet.us 26 Sep '12, 10pm

Did you know that 50% to 70% of the world’s lights are still tired old incandescent bulbs? They account for 2.5% of the wo...