how to calculate formula for boiler supply water

Estimating Methods for Determining End-Use Water ...

The feed water supplied to the boiler is equal to the sum of the steam leaving the boiler and the blowdown discharged from the boiler. The feed water rate can be estimated using the following equation: Feed Water Rate (gal/day) = Steam Generation Rate (gal/day) ÷ [1 (1 ÷ Cycles of Concentration)]

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Water for the Boiler | Spirax Sarco

Water-tube boilers tend to be higher rated perhaps over 1 000 tonnes/h of steam. This means that even a small percentage blowdown can represent a high mass to be blown down. Water-tube boilers tend to operate at higher pressures usually up to 150 bar g. The higher the pressure the greater the energy contained in the blowdown water.

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Calculating heat required for Domestic Hot Water Systems

Estimating for the domestic hot water supply. Where the central heating boiler also heats a tank of domestic water supply the boiler needs to be sized to include keeping the tank full of hot water while not disrupting the hot water for the central heating. This does not apply where a Combi Boiler is installed as no hot water storage is involved.

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Boiler Formulas | Johnston Boiler | Top Quality Boiler ...

P1. Cut-out Pressure Delta. S = 105 80. P2. Cut-in Pressure Delta. S = 25. Factor of Evaporation. Water enters the boiler at 225°F. The boiler pressure is 100 psi and the boiler water temperature is 338°F.

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(PDF) Boiler Calculations | Michael Dellon - Academia.edu

Water boils under constant temperature and pressure so a horizontal line inside the enclosed region represents a vaporization process in the T-s diagram. The steam/water heating process in the boiler represented by the diagram in figure 2 can also be drawn in a T-s diagram (figure 4) if the boiler pressure is assumed to be e.g. 10 MPa.

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