The ship constant is the difference between a vessel's design lightship and its displacement when i.e light ship displacement = light ship weight + light ship constant. The lightship weight includes the ship and its full equipment, engine room spares, water in the boiler and the lubricating oil in the engines.
Controlling TDS in the Boiler Water | Spirax Sarco
26/06/2017 · The supplemental alkalinity requirement is, therefore, 20 ppm minus 15 ppm = 5 ppm required as calcium carbonate. Dividing 5 ppm by 50 (equivalent weight of calcium carbonate) gives 0.10 epm caustic soda (as active), or 0.20 epm as 50% active.
18/10/2015 · The ship constant is the difference between a vessels design lightship and its displacement when i.e. light ship displacement = light ship weight + light ship constant. The lightship weight includes the ship and its full equipment, engine room spares, water in the boiler and the lubricating oil in the engines.
30/09/2018 · k = h * A / C, where. k [1/s] is the cooling coefficient, h [W/ (m² * K)] is the heat transfer coefficient, A [m²] is the area of the heat exchange, C [J/K] is the heat capacity. This formula for the cooling coefficient works best when convection is small.
The solids content of very dilute solutions such as condensate may be calculated with a factor of 0.5-0.6 ppm of dissolved solids per microsiemens (micromho) of specific conductance. For a more concentrated solution such as boiler water, the factor can vary between 0.55 and 0.90 ppm of dissolved solids per microsiemens of specific conductance.
An increase in temperature results in an increase in electrical conductivity. For boiler water, the conductivity increases at the rate of approximately 2% (of the value at 25°C) for every 1°C increase in temperature. This can be written as: Example 3.12.3. A boiler water sample has an unneutralised conductivity of 5 000 μS/cm at 25°C.
Ship constant and draught survey | Marine Surveyor Dubai