Go Back   Physics Help Forum > Physics Forums > Physics

Physics Physics Forum - General Physics Discussion and Physics News

Like Tree2Likes
  • 2 Post By ChipB
LinkBack Thread Tools Display Modes
Old Jun 2nd 2017, 01:14 AM   #1
Senior Member
Join Date: Apr 2017
Posts: 361
Electricity free Air cooling ???

There are a few videos on Youtube of people installing what they believe to be AC units ... It consists of a bank of cut off water bottles large diameter outside , a breeze enters the the bottle , exits through the narrow top inside the house at higher speed , they claim this reduces the temperature by 10*C , I don't believe it can work ...

oz93666 is offline   Reply With Quote
Old Jun 2nd 2017, 05:53 AM   #2
Physics Team
ChipB's Avatar
Join Date: Jun 2010
Location: Morristown, NJ USA
Posts: 2,299
No, it won't work, as there is nothing in this system to remove heat from the incoming air. Also the idea that the air velocity increases as it passes through the bottle is misleading - yes its true that conservation of mass flow says that the velocity out is greater than the velocity in, but left unstated is the fact that the velocity into the bottle is less than the ambient wind velocity. This is because the narrowing of the bottle walls creates a constriction that hinders air flow into the bottle. So the cooling effect of the natural wind is reduced by this set up.
crowxe and oz93666 like this.
ChipB is offline   Reply With Quote

  Physics Help Forum > Physics Forums > Physics

air, cooling, electricity, free

Search tags for this page
Click on a term to search for related topics.
Thread Tools
Display Modes

Similar Physics Forum Discussions
Thread Thread Starter Forum Replies Last Post
Cooling without heat JamieD Thermodynamics and Fluid Mechanics 2 Dec 15th 2016 06:28 AM
Constant volume cooling Rik Advanced Thermodynamics 1 Jun 26th 2016 10:14 AM
Cooling system for LED Panel jigglybulba Advanced Thermodynamics 0 Jun 26th 2014 06:13 AM
Problem in adiabatic expansion and cooling gogabidzia Advanced Thermodynamics 7 Jun 15th 2014 06:15 PM
Newton's Law of Cooling woodstock Kinematics and Dynamics 1 Nov 15th 2008 01:30 PM

Facebook Twitter Google+ RSS Feed