Dependences of the intensity of sediments on the heating surfaces
of the condenser, nozzles and control coupons considering the density of carbonate salts are shown in Fig.
Multiple combinations of performance parameters and adopted constructional designs may lead to substantial differences in thermal energy efficiency of heating surface
and thus increase cost of the entire system.
The research on plain surfaces or tubes shows that the nucleate pool boiling heat transfer of a refrigerant/oil mixture is obviously affected by the oil concentration; at an oil concentration below 5%, oil slightly enhances or reduces the nucleate pool boiling heat transfer, depending on the heating surface
structure (Mohrlok et al.
It can be concluded that, at higher values of SPL, the packets get enough energy to travel to the heat transfer surface and carry the heat from the heating surface
to the bed material
Variety of emitter surfaces available, which include ceramic, fiberglass, glass, or stainless-steel grids to provide uniform heating surface
If the boiler is natural draft, excess air could cool down the heating surface
, keeping fuel from combusting properly.
The latest heat transfer surface design of the Babcock Wanson economisers permits dual fuel operation with both gas and light oil greatly extending periods between cleaning due to the non fouling finning of the extended heating surface
The heating surface
is 6" x 6" and constructed of solid white ceramic glass.
The new compact boiler shell offers generous heating surface
incorporating a furnace tube concentric with the first pass of fire tubes ensuring optimal heat transfer and equalisation of thermal stresses within the boiler pressure vessel.
Although the deposits on convective heating surfaces
contain up to 2% chlorine, as shown by analyses, the data obtained in the long-term studies of PF boilers indicate that corrosive influence of chlorine decreases noticeably when the temperature of the heating surface
metal is below 450 [degrees] C.
Infrared welding suffers none of the disadvantages of hot plate methods, such as plastic adhesion to the heating surface
, which requires frequent tool cleaning.
These are fuel-fired units with air preheat, four-pass design, and extended-coil heating surface
, in sizes up to 12 million Btu/hr.