or Cylinder Blowdown: Blowdown occurs during the period between exhaust valve opening and BDC It is the period (measured in crank degrees) during which residual exhaust gases are expelled from the engine before the exhaust stroke begins Residual gasses not discharged during blowdown must be physically "pumped" out of the cylinder during the exhaust stroke, lowering power output from consumed "pumping work "
removal of liquids and/or solids from a process vessel or storage vessel or line by the use of pressure; often used to remove materials which, in high concentrations, could cause damage to the vessel or line, or exceed limits established by best engineering practices
The removal of water from an evaporative system (e g , cooling tower or boiler) to reduce mineral concentration that can cause scaling Optimum Utility Systems can determine the optimum blowdown rate to avoid unnecessary make-up water and sewer charges
The discharge of recirculating water for the purpose of discharging materials within the system This eliminates the buildup of materials that could cause damages
[ 'blO ] (verb.) before 12th century. Middle English, from Old English blAwan; akin to Old High German blAen to blow, Latin flare, Greek phallos penis.