Boiler efficiency bo

Byworth Boilers has added another energy saving concept to its ranges of fuel efficient steam and hot water boilers. The inclusion of X-ID spiral firetubes means the efficiency of the Yorkshireman three pass wetback steam boiler range has been increased by up to 3%.

The spiral tubes increase heat transfer by up to 80%, not only by increased turbulence and surface area, but by a special attachment/reattachment phenomena in the boundary layer.

The latest concept with the Yorkshireman range is an air preheating system. This uses hot gases from the flue, via an air to air heat exchanger, to warm air before combustion in the burner. This reduces the fuel consumption. Flue gases are also commonly used in an economiser which heats up the boiler feed water, again reducing fuel use. Efficiency can be increased by up to 5% in this way.

The company says it is possible in some applications to use all these concepts - X-ID tube, economiser and air preheat and achieve efficiency figures in the region of 95% (based on nett calorific values).

Peter Baldwin, MD, says: "We have placed a great deal of importance on R&D in the past few years, the goal being reduced energy costs for our customers. As an independent boiler maker, with all production taking place here in the UK, developing new concepts is relatively easy for us."