Igor Zhadanovsky
  • West Newton, MA
  • United States
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Igor Zhadanovsky commented on Igor Zhadanovsky's blog post Steam heating system retrofit in multifamily houses into “vacuum boost” steam heating.
"In many old steam systems I've seen, piping was in a very decent condition and only wet return portion was corroded. Repairing wet return piping and upgrading system with "vacuum boost" would cost only a fraction of retrofit into hot…"
Jul 3
Eric Kjelshus commented on Igor Zhadanovsky's blog post Steam heating system retrofit in multifamily houses into “vacuum boost” steam heating.
"Most old steam systems I see are rotted and to get 100 year old systems going take repiping basement, main risers and pots.    Vacuum heating systems have been around for 150 years.   It takes a very little pipe to send steam to heat…"
Jul 2
Igor Zhadanovsky posted a blog post

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 multifamily sector in deploying energy efficiency incentives…See More
Jun 14
Igor Zhadanovsky joined Norm Bourassa's group
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Multifamily Buildings

For too long there has been relatively little EE focus on multifamily, but some new programs have recently started. This group gives us a venue to share our experiences on cost effective audit & retrofit strategies and analysis tool needs.See More
Jun 7
Igor Zhadanovsky posted a blog post

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 maintenance and reckless “improvements”, it's not surprise that efficiency and…See More
Oct 22, 2015
Igor Zhadanovsky commented on Igor Zhadanovsky's blog post Scrutinizing Condensing Boilers With the Second Law of Thermodynamics (SLT)
"Seith and Kurt: Thanks for your comments. Kurt’s statements sounds right but as usual, devil is in details: Lower quality heat is easier to obtain and generally costs less. Designing your emitter system to operate using a lower quality heat…"
Nov 20, 2013
Kurt Albershardt commented on Igor Zhadanovsky's blog post Scrutinizing Condensing Boilers With the Second Law of Thermodynamics (SLT)
"Hot water is a lower quality heat source than steam.  100ºF water is a lower quality heat source than 180ºF water.  Lower quality heat is easier to obtain and generally costs less. Designing your emitter system to operate using a…"
Nov 20, 2013
Seth Rutledge commented on Igor Zhadanovsky's blog post Scrutinizing Condensing Boilers With the Second Law of Thermodynamics (SLT)
"Am I understanding this correctly: basically lower temperature water does not transfer heat as efficiently as higher temp. water; so even if theoretically you captured 100% of the energy of the fuel if the energy is the same temp. as it is outside…"
Nov 20, 2013
Kurt Albershardt commented on Igor Zhadanovsky's blog post Scrutinizing Condensing Boilers With the Second Law of Thermodynamics (SLT)
"I heartily agree that AFUE needs a major re-work. I do believe that measuring overall system efficiency (in something like BTUs per square foot per degree-day) will factor in these second law effects.   As long as we include pumping costs, it…"
Jul 3, 2013
Igor Zhadanovsky commented on Igor Zhadanovsky's blog post Scrutinizing Condensing Boilers With the Second Law of Thermodynamics (SLT)
"John, thanks for good words about article. It took me a while to figure out how temperatures, AFUE, energetic and exergetic efficiencies are interconnected for  heating systems. Fortunately, found very logical explanation - Szargut…"
Jun 8, 2013
John M Rogers commented on Igor Zhadanovsky's blog post Scrutinizing Condensing Boilers With the Second Law of Thermodynamics (SLT)
"It's hard for me to understand how impatient Curt is behaving about having a college level discussion on some simple basic ideas. Give me more conceps to let simmer in my knowledge base, please. Wonderful article"
Jun 8, 2013
Igor Zhadanovsky commented on Igor Zhadanovsky's blog post Scrutinizing Condensing Boilers With the Second Law of Thermodynamics (SLT)
"Curt, 1lb stone weight at 100 ft elevation is the same at 1 ft,  but has potential energy 100 times  more relative to ground level. Temperature parameter for potential energy of 1  BTU is similar to elevation for stone - it indicates…"
Jun 8, 2013
Curt Kinder commented on Igor Zhadanovsky's blog post Scrutinizing Condensing Boilers With the Second Law of Thermodynamics (SLT)
"Thanks for the review of thermodynamics. Fortunately, I've already eaten a tasty lunch. Chilly homeowners care not a wit about the work potential of heat they need to stay warm. They are interested in safety, health, comfort and efficiency,…"
Jun 7, 2013
Igor Zhadanovsky commented on Igor Zhadanovsky's blog post Scrutinizing Condensing Boilers With the Second Law of Thermodynamics (SLT)
"The Laws of Thermodynamics 1. Energy is conserved. 2. dW ≤ dQ ≤ TdS + Sdt [Condensed form for experts] 3. S=0 at T=0.   1. You can’t win. 2. You can’t even break even. 3. You can’t leave the game.   1.…"
Jun 7, 2013
Curt Kinder commented on Igor Zhadanovsky's blog post Scrutinizing Condensing Boilers With the Second Law of Thermodynamics (SLT)
"So a homeowner is really better off with an 80% AFUE appliance compared with a 90+% model? Why would any homeowner care about "Exergy"? Let me go check my Exergy balance at my online banking and I'll get right back to you!"
Jun 7, 2013
Igor Zhadanovsky commented on Igor Zhadanovsky's blog post Scrutinizing Condensing Boilers With the Second Law of Thermodynamics (SLT)
"Please, check Table 1 in blog.  From exergy point of view, regular hot water boiler is more efficient/economical compared to hot water condensing boiler."
Jun 7, 2013

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Company
AEC
Professional Interests
energy efficiency, steam heating retrofits

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Igor Zhadanovsky's Blog

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

Posted on June 14, 2016 at 8:00am 2 Comments

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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Retrofit of steam heating systems: new alternative.

Posted on October 22, 2015 at 4:55pm 0 Comments

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…

Continue

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

Posted on May 29, 2013 at 9:31am 15 Comments

“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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Bang for the buck: deep-energy retrofit approach

Posted on January 3, 2013 at 1:44pm 32 Comments

"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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At 6:24am on December 19, 2012, Diane Chojnowski said…

Hi Igor,

Welcome to Home Energy Pros! Feel free to join the conversation in the Forum and Groups. And share your energy efficiency photos, videos and upcoming events. If you're blogging about home performance, this is the place for you!

Don't forget to upload your profile photo. And add your location on our Member Map!


Thanks!
Diane, HEP Moderator

 
 
 

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