Jim Tenhundfeld
  • Cincinnati, OH
  • United States
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First Law of Themodynamics
3 Replies

I have been thinking alot about this 1st Law, where energy is neither created or destroyed and i am having difficulty understanding this.After viewing a number of PBS shows about the universe is…Continue

Started this discussion. Last reply by Ed Voytovich Aug 9, 2012.

 

Jim Tenhundfeld's Page

Latest Activity

Jim Tenhundfeld replied to Jack Baikoff's discussion Measuring fresh air intake ducted to a return and no way of measuring from outside.
"Field Controls make a damper that goes inside the duct that can be adjusted for the amount of cfm that you want to bring into the return.  The damper opens to the set amount when the A/H engages."
Jan 17, 2013
Jim Tenhundfeld commented on Christopher Morin's blog post Clocking a Gas Meter
"I agree that clocking the gas meter may indicate the proper gas pressure, but a true combusion anlysis measuring the O2, CO & stack temperature and draft pressure will let you know if the the appliance is operating at its highest…"
Jan 10, 2013
Jim Tenhundfeld replied to Curt Kinder's discussion Vampire load suprise - garage door openers
"Maybe you could train her (ha ha ha) to turn on the switch when she leaves & turn it off when she comes back.  Good luck with that. It would not work with my wife, i am sure of that."
Oct 29, 2012
Jim Tenhundfeld replied to Curt Kinder's discussion Vampire load suprise - garage door openers
"In my particular case, the garage door opener is plugged into the overhead light.  WHen i turn off the power to the light at the light switch, the garage door opener will not operate until the light switch is turned back on.  Could you set…"
Oct 29, 2012
Jim Tenhundfeld replied to Tom Walther's discussion Any thoughts on the Aeroseal product?
"Chris, There are 3 Aeroseal contractors in the Gr. Cincinnati area.  The contractors provide a pre and post total duct leakage test to the home owner. I have seen total duct leakage go from 700cfm down to 100cfm in some of their jobs. …"
Aug 23, 2012
Ed Voytovich replied to Jim Tenhundfeld's discussion First Law of Themodynamics
"Jim . . . I would add that plenty of things at the quantum level behave differently than what we are used to observing (and understanding) on the larger scale.   As an example, You might be interested in this video:  …"
Aug 9, 2012
Tom DelConte replied to Jim Tenhundfeld's discussion First Law of Themodynamics
"Jim, on second thought: Uh oh: entangled particles break second law of thermodynamics . The second law of thermo, or no perpetual motion machines, is being revisited. Quantum teleportation of light particles of 89 miles happened this…"
Aug 8, 2012
Tom DelConte replied to Jim Tenhundfeld's discussion First Law of Themodynamics
"Yes, Jim, you are right, we mostly deal with the first law using classical thermo. It's still correct. It's statistical thermo hat deals with quantum states of atoms and particles. String theory and multiple universes are still under…"
Jul 30, 2012
Jim Tenhundfeld posted a discussion

First Law of Themodynamics

I have been thinking alot about this 1st Law, where energy is neither created or destroyed and i am having difficulty understanding this.After viewing a number of PBS shows about the universe is expanding based on Quantam Physics and the discussions of String Theory in which there may be more than one universe, not to mention the discussions of Quarks and Deep Energy which makes up 70% of the univers, DOES THIS LAW STILL MAKE SENSE AND IS IT STILL CORRECT?See More
Jul 30, 2012
Jim Tenhundfeld joined Sean Lintow Sr's group
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Best Practices (Residential)

Best Building, Retrofitting, or even Auditing Practices - what are they, what should change, what needs to find it's way to the dust bin of history?See More
Oct 26, 2011
Jim Tenhundfeld 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
Oct 26, 2011

Jim Tenhundfeld just added their location.
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Oct 24, 2011
Jim Tenhundfeld is now a member of Home Energy Pros
Oct 21, 2011

Profile Information

Company
Cincinnati State Technical & Community College
Professional Certification
CEM

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At 1:46pm on October 25, 2011, Diane Chojnowski said…

Hi Jim,

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. 


Thanks!
Diane, HEP Moderator

 
 
 

Home Energy Pros

Home Energy Pros was founded by the developers of Home Energy Saver Pro (sponsored by the U.S. Department of Energy,) and brought to you in partnership with Home Energy magazine.

Latest Activity

Steve Waclo posted a discussion

Underperforming? Energy Efficiency of HVAC Equipment Suffers Due to Poor Installation

Hello all,A search of the site seems to indicate this recently published study from NIST has not…See More
2 hours ago
Steve Waclo joined Allison A. Bailes III's group
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HVAC

HVAC design, Manuals J, S, T, & D, Duct leakage, Air flow, ENERGY STAR new home requirements,…See More
2 hours ago
Bob Blanchette posted a discussion

Dual Fuel Systems, at what point do they make sense?

Heat Pump with furnace backup. These make no sense in our area with local NG rates, but they do…See More
16 hours ago
Bob Blanchette joined Hal Skinner's group
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The RCC Classroom (Radiant Control Coatings)

A group where energy professionals can learn about all the different energy saving aspects of…See More
16 hours ago
Shashank Kirloskar posted a blog post

Important Facts about Solar Energy

“I’d put my money on the sun and solar energy. What a source of power! I hope we don’t have to wait…See More
Thursday
reflintorm replied to Dennis McCarthy's discussion Solid state lighting - saves lives- and it improves life .
"In my observation, In most of the lightning appliances led bulbs are used because of their…"
Thursday
Chad Mcaulife posted photos
Wednesday
Bob Blanchette commented on Jeremy Begley's blog post The Home Envelope : Does it Really Matter in a Heat Loss Calculation
"Infiltration makes a HUGE difference. Look at the heat loads on a windy day vs. a calm one. On a…"
Wednesday

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