Hillbilly Heater: Difference between revisions
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*Evacuated - $670 - 15 sf - [https://www.amazon.com/Duda-Solar-Collector-Evacuated-Certified/dp/B00HP846KK/ref=sr_1_10?s=lawn-garden&ie=UTF8&qid=1478787005&sr=1-10&keywords=solar+hot+water] | *Evacuated - $670 - 15 sf - [https://www.amazon.com/Duda-Solar-Collector-Evacuated-Certified/dp/B00HP846KK/ref=sr_1_10?s=lawn-garden&ie=UTF8&qid=1478787005&sr=1-10&keywords=solar+hot+water] | ||
==DIY== | ==DIY== | ||
*$ | *$250 cost for 4x8 foot finned collector with CPVC, which works comparably to finned aluminum collector - or $8/sf - [http://www.builditsolar.com/Projects/WaterHeating/CPVCCollector/CPVCCollectorTest.htm] | ||
=System Goals= | =System Goals= | ||
Exchange Solar heat to aquarium water. | Exchange Solar heat to aquarium water. | ||
Revision as of 19:34, 17 November 2016
Industry Standards
- Hillbilly heater - 20 sf or 2 sq meters per 500' roll of tubing - $75 - [1]
- Amazon - 4 sf - $124 - [2]
- Evacuated tube - 5 sf - $179 + $230 ship - [3]
- Evacuated - $670 - 15 sf - [4]
DIY
- $250 cost for 4x8 foot finned collector with CPVC, which works comparably to finned aluminum collector - or $8/sf - [5]
System Goals
Exchange Solar heat to aquarium water.
Efficiency
Heat transfer is limited by the thermal conductivity of the pipe (PEH ~0.5 W/m K good for plastics).
Is high-pressure system ideal or is a low-pressure gravity system possible using black gutter(s) etc.?
Can water be mixed directly or is thermal mixing a bigger problem?
Can temperature be managed by pump control?
Reference Links
https://www.youtube.com/watch?v=0csXsRzrq2Y&t=5s Marcin Aquaponic Green House walkthrough