Wednesday, September 23, 2015

nut types


Wednesday, September 16, 2015

Heating surface to Boiler capacity

For many years five (5) square feet per boiler horsepower was the standard in the design of the traditional multi-pass fire tube boiler. In these cases about 40 - 50 % of the burner's heat energy was transferred in the furnace (first pass) as radiant energy, and the balance was transferred in the convection passes which consisted of 2 or 3 additional passes using 2 - 3" tubes some of which may have had turbulators to increase the heat transfer coefficient. Today, with the call for smaller fire tube footprints, and the use of sophisticated computer algoythms, i.e., Computational Fluid Dynamics (CFD) with Finite Element Analysis (FEA), boiler designers are able to produce smaller fire tube boilers with the same integrity and life as the old 5 square foot boiler; using a larger furnace (60-70% radiant heat absorbed), proper matching of burner to furnace, and extended surfaces in the convective tube passes which has now been reduced from 2 or 3 additional passes to 1. This not only preserves or enhances fuel to steam efficiency in a smaller package, but reduces the blower motor brake horsepower as well. A good example of the design is Cleaver Brooks CBEX Elite or Premium models which can be found on their website.
Copied from Linkedin.: Steve Connor, Director Marketing Services at Cleaver-Brooks

Saturday, September 5, 2015

questions that need answers

Engineers faces the following questions when working factories and need answers:-
1. What is the pressure drop/back pressure developed in the burner in Hurst Boiler (300 series)?
2. What is ultimate pressure and significance in oil rotary pump ?
3. How the linear expansion of MS pipe can be measured ?
4.How the Chimney height is measured ?
5. What is COD and BOD in ETP and their significance?
6. What is single Point Lubrication?
7. What is RBD Oil and its uses?
8. What is torr , used in rotary oil pump and its equivalence unit?
9. What is the difference between bend and Elbow in pipe fittings and their applications?