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energy recovery

Is Energy Recovery Always Good? No.

By Energy Rant No Comments
Last week we introduced exergy and at least one application of it in a building. First, let me make something very clear, for the refrigeration cycle, if I’m cooling beer or freezing leftovers, the heat that is sucked out of those masses is rejected somewhere else. For refrigerators and freezers, it is rejected to the room in which they exist. For air conditioning, most commercial refrigeration, and all industrial refrigeration, it is rejected outside – unless, it is captured for useful heating. Commercial HVAC For commercial HVAC, if CONsultants don’t think holistically about the entire heating and cooling needs, and...
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The End of Lighting

By Energy Efficiency, Energy Rant 4 Comments
Believe it or not, I did not have a rant topic in mind going into Saturday morning – my rant writing time.  But the fog burned off quickly as a topic came into view – one that arose during the prior week.  Incidentally, I once heard a “meteorologist” instructor say he always scolded his students for saying fog “burns” off.  Instead, they should say the fog lifted.  What?  Fog is suspended water droplets, not vapor.  Water vapor in air, or as steam, is invisible.  When fog “burns off,” it changes from visible water droplets to invisible vapor, so while “burn...
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Need Not Miracles

By Energy Efficiency, Energy Rant, Renewable Energy, Sustainability No Comments
Thousands, make that millions of people, including some smart people and congress people, when talking solutions for our energy efficiency low-carbon future are continuously babbling about “technology” that will save us all.  Bill Gates says we need Miracles.  Whadahyou talking about man?  The White House announces $130 million for a new building energy efficiency effort - “a multi-agency initiative to spur regional economic growth while making buildings more energy efficient.”  It will be “an Energy Innovation Hub focused on developing new technologies to improve the design of energy-efficient building systems”.  Get ready for cold fusion to reemerge. Let me tell...
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