Gadget Freak

Gadget Freak Case #249: The Heatilator Helper

1 saves
View Comments: Newest First|Oldest First|Threaded View
<<  <  Page 4/4
User Rank
Re: Load on the motor
78RPM   12/6/2013 2:47:11 PM
Ann, yes, I feed my Empyre outdoor furnace twice a day for a 2800 sq. ft. house. It has a 400 gallon water jacket. When the water temperature falls to 160 degrees, a damper fans the flames. The damper stops at 172 degrees and the fire smoulders. The hot water is piped under the house through a heat exchanger. A second water circuit circulates under the floor in five zones plus the garage. If the outside water in the exchanger falls to 109 degrees (like if I forgot to feed the furnace), then electric heating of the floor circuit takes over. It's quiet and comfortable with warm floors.

I have 64 acres of forest land so I have sustainable supply using dead trees, crooked trees, and growth that needs to be thinned for a healthy forest. I just wish I had a way to capture the smoke and creosote to reduce my carbon footprint.

User Rank
Nice project
armorris   12/6/2013 2:30:40 PM
Nice project. I never knew there was ever such a thing as a "heatilator". Definitely old-school technology. You don't see PUTs (programmable unijunction transistiors) much anymore.

An outdoor woodstove is a wood furnace in an outdoor building. It has a heat exchanger inside it that heats water that is piped underground to radiators in the house. All of my relatives in West Virginia have them. They very efficiently burn the wood that is very cheap there. The Forestry Service marks trees that residents can cut down for free. The only cost is the labor to cut down the trees, and you are asked not leave a mess behind. The Forestry Service gets the forests thinned to minimize fire risk without having to hire it done. Everybody wins.

Ann R. Thryft
User Rank
Re: Load on the motor
Ann R. Thryft   12/6/2013 1:31:35 PM
So you're another woodburner, 78RPM! But I'm curious--you say it's an outdoor wood furnace. What is that and how does heat get transferred inside efficiently where you need it?

User Rank
Load on the motor
78RPM   12/6/2013 1:22:37 PM
Ann, like you, we heat with wood using an outdoor wood furnace. I do feel a little guilty about smoke and CO2 I'm adding to the forest mountain air and would like a way to capture it.

I have a couple of suggestions for Dick. You could have used a MOSFET for Q4 to be more efficient than an NPN transistor. I notice you use a tight hysteresis of 0.4V. The valve flap somewhat restricts air flow and produces load on the fan. How about using some louvers that just snap open and closed using two small solenoids that are only active during the transition second between open and closed?  This would completely open the air path and reduce load on the fan.

Ann R. Thryft
User Rank
Not pretty but looks like it does the job
Ann R. Thryft   12/6/2013 11:20:30 AM
Well, it isn't beautiful but it sure looks functional. Preserving heat is a big topic right now where I live--we're having record lows at night. I've got an excellent woodstove as our main heat source so I don't need this gadget, but many people here in the mountains have installed inserts in fireplaces as an alternative to a woodstove. They could definitely use this.

<<  <  Page 4/4
Partner Zone
More Blogs from Gadget Freak
The DDV-IP is a two-wheeled self-balancing robot that can deliver cold beverages to thirsty folks on hot summer days. A wireless RF remote enables manual control of the device beyond the act of self-balancing. All of the features of the DDV-IP result in an effective delivery vehicle while providing entertainment to the user.
Design News and Allied Electronics have raised the stakes for our second-annual Gadget Freak of the Year contest. The top three gadgeteers will be awarded a total of $10,000. Don't delay, enter today!
Adam Berger hacked a computer keyboard into a mini key-tar to play with his band.
Dick Bipes couldn't find a boat lift remote with the specs he wanted, so he created his own for automatic operation.
This Gadget Freak Review looks at a keyless Bluetooth padlock that works with your smartphone, along with a system that tracks your sleep behavior and wakes you at the perfect time in your sleep cycle to avoid morning grogginess.
Design News Webinar Series
10/7/2014 8:00 a.m. California / 11:00 a.m. New York
9/25/2014 11:00 a.m. California / 2:00 p.m. New York
9/10/2014 11:00 a.m. California / 2:00 p.m. New York
7/23/2014 11:00 a.m. California / 2:00 p.m. New York
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Oct 20 - 24, How to Design & Build an Embedded Web Server: An Embedded TCP/IP Tutorial
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6

Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.
Next Class: 10/28-10/30 11:00 AM
Sponsored by Stratasys
Next Class: 10/28-10/30 2:00 PM
Sponsored by Gates Corporation
Next Class: 11/11-11/13 2:00 PM
Sponsored by Littelfuse
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Sponsored Content

Technology Marketplace

Copyright © 2014 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service