### Appendix A: An Introduction to Steam Turbine Selecti

Steam RateASR ( ), which is the steam rate we will need to operate the turbine at the plant site. Th eoretical Steam Rate (TRS) = 2545/(h 1 – h 2) TSR units are pounds/horsepower- hours or (Lb/hp-hr) 2545 is a constant, (2545 Btu/hp-hr) h 1 = enthalpy of steam at the inlet pressure and temperature. British thermal unit/pound (Btu/lb) h 2

Get a Quote### Steam Calculators: Boiler Calculat

[Steam Property Calculator] => Specific Enthalpy = 1,187.6 btu/lbm; Steam Energy Flow = Specific Enthalpy * Mass Flow [ Steam Energy Flow = 59,892 = 1,187.6 btu/lbm * 47.8 klb/hr] Step 2: Determine Feedwater Properties and Mass Flow The feedwater flow rate can be calculated from steam mass flow and blowdown rate:

Get a Quote### Boiler Cheat Sheet - Novathe

33.475 BTU / hr (9,811 kilowatts) to generate 1 hp. Unfortunately, the common practice is to use the conversion factor of 34.5 lb / hr hp to calculate the boiler generated steam rate without considering that the boiler does not work at atmospheric pressure. ex. 500 hp x 34.5 lb / hp hr = 17,250 lb / hr produced by the boiler. This is what we ...

Get a Quote### How to Convert Steam to BTU | Scienci

Mar 13, 2018· For the low-pressure steam typically used in heating systems, that ratio is 1,194 BTUs for every pound of steam the system provides. If your boiler supplies 400 pounds of steam per hour, for example, you would multiply 400 pounds by 1,194 to arrive at a figure of 477,600 BTUs.

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There are 4 tubes per section and 8 sections. Table F shows this size tube type radiator has 2 1/4 square feet of radiation per section. 2 1/4 times 8 (the number of sections) equals 18 square feet of direct radiation. 18 times 240 (BTU/Hr.) equals 4,320 BTU/Hr. for this radiator. 8 7 6 5 4 3 2 1 7" 20".

Get a Quote### BOILER SELECTION CONSIDERATIONS - Cleaver-Broo

Boiler horsepower (BHP) is a measure of boiler energy output. One boiler horsepower (from and at 212 °F): † BHP = 34.5 lbs/hr † BHP = 33,472 Btu/hr † BHP = 9.8 kW † BHP should not be confused with other horsepower measurements.

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Sep 06, 2001· The full 150 bhp output equates to 5,017,000 Btu/hr. With an assumed efficiency of 80%, the input at full power is 6,271,000 Btu/hr. Turned down to 20% output, the unit will put out 30 bhp or 1,003,000 Btu/hr at a somewhat lower efficiency, which is assumed to be 75%. At this turndown ratio and efficiency, the input will be 1,338,000 Btu/hr.

Get a Quote### How to Convert Energy Units From BTU to Pounds Per Hour .

Apr 12, 2017· Convert your units of hp into pounds of steam per hour by multiplying the number calculated in the previous step by 34.5. Using numbers from our previous example, if you multiply 220 by 34.5, then you get 7,590 pounds of steam per hour created by your boiler (220 x 34.5 = 7,590).

Get a Quote### steam boiler size of unit btu

of steam, or Btu/hr. Boiler Selection Considerations 3 The firebox boiler is a compact, economical unit and serves as a good fit for seasonal use and when efficiency is not the driving factor. Sizes range from 12 to Flexible watertube boilers are available in size ranges from 2 to 9 MMBtu/hr input.

Get a Quote### What Size Boiler Do I Need For My House? | U.S. Boiler Compa

Apr 30, 2019· BTUh simply refers British Thermal Units per hour. For instance, if you are looking at a boiler with a rating of 80,000 BTUh, you can safely assume that the unit’s gross output is 80,000 BTUs, or 80 MBH (one MBH = 1,000 BTUh).

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Boiler BTU Calculator - Boiler Sizing Calculator - Boiler Sizing - Boiler BTU Calculator. Free shipping on orders over $99 ... We list it on our site because we do sell replacement parts for this unit. Please contact us with any questions: 1-888-757-4774 ...

Get a Quote### Boiler Capacity - Engineering ToolB

A boilers capacity is usually expressed as kBtu/hour (1000 Btu/hour) and can be calculated as. W = (h g - h f) m (1) where . W = boiler capacity (Btu/h, kW) h g = enthalpy steam (Btu/lb, kJ/kg) h f = enthalpy condensate (Btu/lb, kJ/kg) m = steam evaporated (lb/h, kg/s) Boiler Horsepower - BHP. The Boiler Horsepower (BHP) is. the amount of energy required to produce 34.5 pounds of steam per hour at a …

Get a Quote### High Efficiency Steam Boiler? — Heating Help: The Wa

For a large 150,000 btu/hr furnace rated at 90% AFUE, the total input is: 150,000 / .85 = 176,470 btu Electrical usage +10,440 btu = 186,910 btu 150,000 x 90% = 135,000 output Now putting the two together you have 135,000 btu out / 186,910 btu in for a total efficiency of 72.2% Now, looking at a steam boiler, assuming the same grid efficiencies,

Get a Quote### General Engineering Data - Complete Boiler Room Solutio

A 500 hp boiler at 125 psig has a capacity of 17210 lbs/hr. Pressure drop will be found through 100 feet of 5" inside diameter pipe. First, convert pounds/hr to pounds/min by dividing by 60:

Get a Quote### Boiler Ratings - Spirax Sarco | First for Steam Solutio

The ‘from and at’ rating is widely used as a datum by shell boiler manufacturers to give a boiler a rating which shows the amount of steam in kg/h which the boiler can create ‘from and at 100°C’,at atmospheric pressure. Each kilogram of steam would then have received 2 257 kJ of heat from the boiler.

Get a Quote### Boiler Formulas | Johnston Boil

A scotch marine boiler has a furnace volume of 45.5 cu. ft. if 3825.2 cu. ft. of natural gas is burned per hour and each contains 1100 Btu, what is the rate of combustion? RC = H / (Vf * t) Return Condensate Percentage in Feedwater

Get a Quote### Boiler Ratings Explained | HeatingHe

Jun 18, 2014· Then, in 1967, they further reduced the Pickup Factor from 1.33 to 1.15, but only for hot water boilers. They let the factor for steam boiler sizing remain at 1.33 because steam piping is bigger than hot water piping. This is because steam is bigger than water. There's one problem here, though. Steam pipes contain hardly any water.

Get a Quote### Boilers - Heaters - The Home Dep

Equip your home with 117,000 BTU to 131,000 Equip your home with 117,000 BTU to 131,000 BTUs of heating power per hour using this 3.2 Gal. Oil Boiler that is ideal for heating large spaces up to 3,000 sq. ft. ENERGY STAR qualification and an 86% Annual Fuel Utilization Efficiency helps ensure energy-efficient heating. The boiler is CSA listed for improved safety.

Get a Quote### Boiler Horsepower - Engineering ToolB

A common definition of one boiler horsepower is the amount of energy required to produce 34.5 pounds (15.65 kg) of steam per hour at pressure and temperature 0 psig (0 bar) and 212oF (100oC) - with feed water at pressure 0 psig and temperature 212oF. One boiler horsepower is about 33479 Btu per hour (about 9812 watts, 8437 kcal/hr).

Get a Quote### Steam Tables… - Missou

in British thermal units (Btu). Latent Heat or Heat of Vaporization (Column 5). The amount of heat (ex-pressed in Btu) required to change a pound of boiling water to a pound of steam. This same amount of heat is released when a pound of steam is condensed back into a pound of water. This heat quantity is different for every

Get a Quote### Unit Conversion--How to Calculate Boiler Horsepow

“Boiler horsepower, a unit of measurement of power of steam boilers” from Wiki. A BHP is equivalent to 33,475 BTU/Hr or 8430 Kcal/Hr and it should be noted that a boiler horsepower is 13.1547 times a normal horsepower. Click on the Icon above will initiate Heat Converter, Pressure Converter, Temperature Converter Converted HP into LB

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