### Proper Boiler Feed Water Temperature Management | Powerhouse

Creating Multiple Water Temperatures in Hydronic Heating

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### What is Heat Exchanger Analysis - Performance Calculation

Mar 21, 2016 · Our load is: 13,500 X 5 X (80-75) is about 330,000 BTUH. The pick-up, or cold start load, takes the total volume of 94,136 cubic feet of water from 40°F to 80°F in 48 hours. 94,136 X 62.3 X (80-45)/48 is about 4,300,000 BTUH. I know I can do this with a 4 million BTUH water heater. …

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### VARIOUS FORMULAS FOR WATER HEATING CALCULATIONS

VARIOUS FORMULAS FOR WATER HEATING CALCULATIONS % Efficiency = GPH X 8.25 X Temp. Rise X 1.0 Btu/Hr. Input Specific Heat Btu/Output = GPH X 8.25 Lbs./Gal. X Temp. Rise X 1.0 Btu/Input = GPH X 8.25 X Temp. Rise X 1.0 % Efficiency Gal/Per/Hr. = Btu/Hr. Input X % Efficiency Temp. Rise X 8.25 Rise (°F) = Btu/Hr. Input X % Efficiency GPH X 8.25

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### Parallel vs. Series Piping - Hot Water

Proper Boiler Feed Water Temperature Management | Powerhouse

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### Inlet Water Temperatures and Boiler Corrosion

Parallel-Equally manifolding the inlet water pipe and outlet water pipe in multiple heater installations. Having equal number of fittings; as well as, lengths of pipe. Series- Piping the outlet of one heater into the inlet of the next. Why shouldn't I pipe in series? Piping in series can cause the first heater …

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### Creating Multiple Water Temperatures in Hydronic Heating

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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### Boiler Formulas | Johnston Boiler | Top Quality Boiler

Creating Multiple Water Temperatures in Hydronic Heating

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### Swimming Pool Water Heaters Part 1: Calculating Load

VARIOUS FORMULAS FOR WATER HEATING CALCULATIONS

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### Arithmetic and Logarithmic Mean Temperature Differences in

LMTD = Logarithmic Mean Temperature Difference (o F, o C) For parallel flow: dt i = t pi - t si = inlet primary and secondary fluid temperature difference (o F, o C) dt o = t po - t so = outlet primary and secondary fluid temperature difference (o F, o C) For counter flow: dt i = t pi - t so = inlet …

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### How to calculate the kW required to heat a volume of water

The difference between 140°F and 180°F in boiler feed water temperature equates to about a 3-4% difference in boiler efficiency. Feed water preheating typically occurs in either the feedwater tank or deaerator using supplementary steam. Pre-heating the feedwater is the most basic method of mechanical deaeration, or the process of removing dissolved oxygen from water.

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