Igor Zhadanovsky's Blog (4)

Steam heating system retrofit in multifamily houses into “vacuum boost” steam heating.

Problem scale. Significant, untapped opportunities exist to improve the energy efficiency of the nation’s multifamily housing stock, which accounts annually for more than 100 million tons of carbon emissions and approximately $22 billion in energy expenditures [1]. Most multifamily rental properties were constructed before modern building energy codes were adopted, and existing utility incentive and rebate programs often overlook the…

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Added by Igor Zhadanovsky on June 14, 2016 at 8:00am — 2 Comments

Retrofit of steam heating systems: new alternative.

Since 1850th steam heating system was system of choice in US. In 1920th hot water circulator introduction into market shifted preferences towards hot water heating thanks to drastic reduction of installation cost. In 1960th forced air systems became popular for the same reason.

Today millions of steam heating systems still deliver heat in residential, commercial and industrial buildings. After decades of poor or no…

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Added by Igor Zhadanovsky on October 22, 2015 at 4:55pm — No Comments

Scrutinizing Condensing Boilers With the Second Law of Thermodynamics (SLT)

“It’s amazing. Every year, we find somebody who comes up with a way of going around the second law (of Thermodynamics) and somehow convinces people who are very smart that it will work.”      MIT lecture on  Thermodynamics and & Kinetics, Spring 2008

 

 

Since the 1980s, hot water condensing boilers (CB) have…

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Added by Igor Zhadanovsky on May 29, 2013 at 9:31am — 15 Comments

Bang for the buck: deep-energy retrofit approach

"Americans can always be counted on to do the right thing...after they have exhausted all other possibilities."                                                                                                      Winston Churchill

How much does it cost to perform a deep-energy retrofit at a 100-year-old single-family home? Thanks to a recent study in Utica, New York, we now know the answer: about $100,000.…

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Added by Igor Zhadanovsky on January 3, 2013 at 1:44pm — 32 Comments

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Natural Gas is Becoming Less Attractive

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There has been a lot of interest of late in the weatherization and broader home performance…See More
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