HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
Blogs
Gadget Freak

Gadget Freak Case #249: The Heatilator Helper

NO RATINGS
1 saves
View Comments: Newest First|Oldest First|Threaded View
<<  <  Page 4/4
78RPM
User Rank
Gold
Re: Load on the motor
78RPM   12/6/2013 2:47:11 PM
NO RATINGS
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.

armorris
User Rank
Platinum
Nice project
armorris   12/6/2013 2:30:40 PM
NO RATINGS
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
Blogger
Re: Load on the motor
Ann R. Thryft   12/6/2013 1:31:35 PM
NO RATINGS
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?

78RPM
User Rank
Gold
Load on the motor
78RPM   12/6/2013 1:22:37 PM
NO RATINGS
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
Blogger
Not pretty but looks like it does the job
Ann R. Thryft   12/6/2013 11:20:30 AM
NO RATINGS
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
This Gadget Freak review looks at a cooler that is essentially a party on wheels with a built-in blender, Bluetooth speaker, and USB charger. We also look at a sustainable, rotating wireless smartphone charger.
There is still time to get in your gadgets for the Design News and Allied Electronics second annual Gadget Freak of the Year contest. The top three gadgeteers will be awarded a total of $10,000.
This Hollywood movie-style gag bomb doubles as an alarm clock and a countdown timer.
Marin Davide created a prototype of a moving biped using a shape memory alloy that works like a real muscle to move a cardboard leg.
You can put this thermometer anywhere with WiFi and collect data for months to years on a single battery, depending on how often you check the temperature.
Design News Webinar Series
7/23/2014 11:00 a.m. California / 2:00 p.m. New York
7/17/2014 11:00 a.m. California / 2:00 p.m. New York
6/25/2014 11:00 a.m. California / 2:00 p.m. New York
5/13/2014 10:00 a.m. California / 1:00 p.m. New York / 6:00 p.m. London
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Jul 21 - 25, Design Products With Bluetooth Low Energy
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: August 12 - 14
Sponsored by igus
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