http://www.vacuumcleaners-comparison.co.uk Lots of Vacuum Cleaner Reviews and Comprisons Mon, 05 Jul 2010 18:50:14 +0000 http://wordpress.org/?v=2.8 en hourly 1 http://www.vacuumcleaners-comparison.co.uk/dyson-vacuum/stainless-steel-flask-engraved-name-dyson/ http://www.vacuumcleaners-comparison.co.uk/dyson-vacuum/stainless-steel-flask-engraved-name-dyson/#comments Mon, 21 Dec 2009 20:08:42 +0000 admin http://www.vacuumcleaners-comparison.co.uk/dyson-vacuum/stainless-steel-flask-engraved-name-dyson/
Product Description
Stainless steel flask, 200 ml (6 3/4 oz), 90 x 125 x 20 mm (3 1/2″ x 5″ x 3/4″)… More >>
Stainless steel flask. Engraved name: Dyson

]]> http://www.vacuumcleaners-comparison.co.uk/dyson-vacuum/stainless-steel-flask-engraved-name-dyson/feed/ 0 http://www.vacuumcleaners-comparison.co.uk/dyson-vacuum/how-good-is-vacuum-between-the-walls-of-vacuum-flask/ http://www.vacuumcleaners-comparison.co.uk/dyson-vacuum/how-good-is-vacuum-between-the-walls-of-vacuum-flask/#comments Wed, 26 Aug 2009 19:06:40 +0000 admin http://www.vacuumcleaners-comparison.co.uk/?p=107 The gap between outer and inner walls of vacuum flask is 1cm.
Before the flask was evacuated, the air between the walls was at normal pressure 100kPa and the flask was losing heat at rate 100W.
After air was evacuated and the flask was sealed, the flask is losing heat at rate 0.1W.
Assuming that all heat transfer is due to heat conductivity of residiul air only, ESTIMATE the pressure of residual air between the walls of the flask.

]]> http://www.vacuumcleaners-comparison.co.uk/dyson-vacuum/how-good-is-vacuum-between-the-walls-of-vacuum-flask/feed/ 4