### Boiler Ratings | Spirax Sarco

This tutorial explains the three most commonly used boiler ratings: The 'From and at' rating for evaporation, the kW rating for heat output, and boiler horsepower. 'From and at' rating The ‘from and at’ rating is widely used as a datum by shell boiler manufacturers to give a boiler a rating …

Get a Quote### Boiler Capacity - Engineering ToolBox

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 …

Get a Quote### Boiler Horsepower - Engineering ToolBox

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### Boiler Ratings and Boiler Load - Alken-Murray

To convert BTU into hp, divide the BTU rating by 33,472. Example: 8,368,000 BTU ÷ 33,472 = 250. Boiler load- The horsepower, lbs of steam per hour, or BTU is the rating indicating the maximum capacity of a boiler. When a boiler operates at its maximum rated capacity, it is referred to as maximum load.

Get a Quote### Boiler Ratings Explained - Heating Help

Jun 18, 2014· When you look in a boiler manufacturer's catalog you'll see that there are several types of ratings for each boiler. There's the Input rating, the Gross Output rating (which some call the D.O.E. Heating Capacity) and then there's the Net Output rating.

Get a Quote### Boiler Cheat Sheet - Novatherm

Enthalpy of steam at 130 psig = 1194.2 BTU / lb Enthalpy of water at 180oF = 148 BTU / lb 500 hp x 33475 BTU / hr hp = 16,737,500 BTU / hr The real capacity will be 16,737,500 = / (1194.2 - 148) = 15.998 …

Get a Quote### Making sense of boiler ratings - HPAC Magazine

Aug 16, 2017· For example, if we have a natural gas boiler with an input rating of 100,000 Btu/h and a heating capacity of 85,000, we would have a steady state efficiency of 85 per cent. This steady state can only be measured when the boiler …

Get a Quote### Ratings may be expressed in the following units

Gross Rating – The full output of a boiler actually available to the heating or process system at the outlet nozzle. Net Ratings – The net connected design load that can be supplied with heat by a boiler of …

Get a Quote### Determining Boiler Capacity from Heating Surface Area

Dec 10, 2004· At 100% rating, for WT. boilers, steaming rate is 3 1/2 lbs saturated steam per sq.ft of heating surface, however dont us this value since WT boiler will produce steam well over 100% rating.For example,a horizontal WT boiler …

Get a Quote### unit conversion: ton of refrigeration to horsepower - HVAC

Feb 18, 2005· The boiler horsepower is the output capacity of the boiler in kilowatts divided by 10. ie. A boiler that has an output of 170,000 btuh or 50 kw (170,000 * .293 / 1000) has a boiler horsepower of 5.

Get a Quote### convert capacity of boiler from tph to kw – CFBC Boiler

Large boiler capacity is generally given in lbs of steam evaporated per hour, under specified To convert horsepower (hp) into lbs of steam: Multiply hp x 34.5. Sep 18, 2008 (Large boiler capacities are often …

Get a Quote### boiler steam production conversion ton hr to kw – oil

Boiler Horsepower (bhp) Kilowatts (kW) 1,000,000 Boiler Horsepower to Kilowatts = 9810657: 9.81055407×P [BHP]=P [kW]. 0.101931042 Power conversion table Convert boiler horsepower to conversion formulas Boiler horsepower to kilowatt (BHP to kW W = boiler capacity (Btu/h…

Get a Quote### Refrigeration tons to kilowatts (kW) conversion calculator

kW to tons conversion calculator How to convert tons to kW. One refrigeration ton is equal to 3.5168525 kilowatts: 1 RT = 3.5168525 kW. One kilowatt is equal to 0.284345 refrigeration ton: 1 kW = 0.28434517 RT . So the power P in kilowatts (kW) is equal to the power P in refrigeration tons (RT) times 3.5168525: P (kW…

Get a Quote### Boiler Formulas - Johnston Boiler

Boiler Horsepower What is the boiler horsepower of a boiler generating 21,500 lbs of steam per hour at 155 psi? The factor of evaporation is 1.08. BHP = (LB/HR*fe)/34.5 BHP Boiler Horsepower BHP = …

Get a Quote### Measures of Input and Output for Heating and Cooling Systems

Nov 01, 2019· The number of British Thermal Units per hour that the furnace or boiler consumes when running at a steady state. (That is, when it has finished startup and is running at full power.) Boilers with an input BTUh greater than 350,000 are typically considered commercial boilers. Ton (as a unit of cooling capacity)

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