Use a default value for Bhp/ton and run the model. The horsepower was a widely adopted unit to measure the output of turbines, piston engines, electric motors, and other machinery. In the modeling result you should find the auto-sized condenser water flow in gpm. There are many different standards and types of horsepower. Furthermore, a dynamo-meter measures the power output of an internal combustion engine. In order to calculate it, you must place one of the ends of a manometer where the fan inlet is. Enter the power in watts and press the Convert button: Enter watts: W : Result in mechanical horsepower: hp (I) Result in electrical horsepower: hp (E) Result in metric horsepower: hp (M) Horsepower to watts conversion How to convert watts to horsepower Watts to mechanic / hydraulic horsepower. Use a default value for Bhp/ton and run the model. At this performance point, the sone value is 17.4 and the fan Bhp required is 0.737. This calculator allows you to choose between either of those two calculations. wg BHP = Fan power input, hp Static and total fan efficiency (Figure 1) can be plotted along with the fan curve. BHP to kW conversion calculator. CFM Cubic feet per minute, the volume of air moved per minute. When density of air varies: 1. We’ve seen it all. It was used to compare the power of a horse with that of a steam engine. BHP to kW conversion How to convert kW to BHP. I would like to get the bhp. For its calculation, a material weighing 100 pounds was strapped to a draft horse, and it was determined that i… There are many factors to consider in every industrial fan application. From: Plant Engineer's Handbook, 2001 For a higher horsepower application, we would typically add about three percent, and for a lower horsepower application we would add up to six percent to the motor size above the fan BHP. BHP = (Q (CFM)xSGxSP (in mmWG))/ (6356 x Fan efficiency) Where, Q= Rate of flow (CFM) SG=Specific Gravity (For Air =1) SP=Static Pressure (in mmWG) You can consider the fan efficiency if you do not know it, it must be in range of 65-80%. Fan’s air-delivery and RPM will vary as the square root of pressure ratio. In the modeling result you should find the auto-sized condenser water flow in gpm. This is typical of all fan OEM catalogs I see. 12. ARR.Arrangement of fan. CFM x 1000. HBhp = hydraulic brake horsepower required by pump (pump efficiency = 1.0 for HBHP calculation) Divide the gpm by 38.2 to determine the HP of the cooling tower fan. The other end of the manometer must be placed at the end of the fan outlet. While it can be safe to go above the specified size, be sure to consider fan efficiency in your specification. Long. But you should have to know the static pressure. Please read AddThis Privacy for more information. So the power conversion of BHP to kilowatts is given by: P (kW) = 0.745699872 × P (hp) Example. Senior Application Engineer Chet White explains what we need to know about how to determine the correct motor size for your belt-driven or direct-driven fan application in this 1½ minute video. This peak efficiency is used to determine the FEG value. One of the most complicated parts of the calculation is determining the filter credit. This is the minimum amount of power needed to operate the fan. Mechanical Horsepower (MHP): Mechanical horsepower is the measure of the power produced by the fan, a function of the air flow rate measured in cubic feet per minute (CFM) and the total static pressure (TSP) measured in “in. Used to describe the rotation of an impeller. H2O): New Horsepower (HP): According to the report Improving Fan System Performance: A Sourcebook for Industry, developed by the U.S. Department of Energy’s (DOE) Industrial Technologies Program and the Air Movement and Control Association International, Inc. (AMCA), a DOE Allied Partner: “An important aspect of a fan performance curve is the best efficiency point (BEP), where a fan operates most cost-effectively in terms of both energy efficiency and maintenance considerations. D s = specific diameter, ft. EFF = pump efficiency. Some of our calculators and applications let you save application data to your local computer. January 25, 2010 - 11:17 am. bhp = 0.0013 × CFMS + A bhp = 0.0013 × 120000 + 0 bhp = 156 Lookup Table 10.8 for the next size greater than 156 bhp using the enclosed motor at 1800 rpm, the fan motor efficiency is 95%, therefore, the fan power is 122,501 W, as calculated below: Pfan = bhp × 746 / Fan Motor Efficiency Pfan = 156 × 746 / 0.95 Pfan = 122,501 Watts. We don't collect information from our users. 3rd ed. The 1.73 is the square root of the number 3 for the three phases. CFM Cubic feet per minute, the volume of air moved per minute. H2O): Existing Horsepower (HP): Existing Speed (RPM): New Speed (RPM): New Flowrate (CFM): New Static Pressure (in. ASHRAE Rocky Mountain Chapter System Effects 3 4 . USGBC is asking me for a manual calculation on fan power. BHP is measured within the engine’s output shaft, and was originally designed to calculate and compare the output of steam engines. P = (Q x PF)/(33,000 x ) or. ASHRAE Rocky Mountain Chapter Design Airflow . Short. If we follow the 0.250” SP column down further, we find a performance point of 2434 CFM. … P BHP = Brake Horse Power (hp) μ = fan efficiency w.g. Obs. Google use cookies for serving our ads and handling visitor statistics. CCW Counterclockwise. The term ‘horsepower’ was coined by James Watt, for efficient marketing of his improved steam engine. kW to BHP conversion calculator. • Pt = Total pressure, in-WG. CL Class of fan. For constant pressure — fan speed, air-delivery and horse- Convert … Can somebody shed some light? To get the most accurate results, it is imperative that: An accurate vehicle weight value is entered - this must include the weight of the vehicle as well as fuel, occupants, and baggage. We don't save this data. For a higher horsepower application, we would typically add about three percent, and for a lower horsepower application we would add up to six percent to the motor size above the fan BHP. This calculator can be used to determine the centrifugal pump brake horsepower (BHP) for a given flow rate (Q), head (H), specific gravity (S.G.), and efficiency (Eff). Remember - More details = better answers Also: If you get a response it's polite to respond to it. Later, John Smeaton estimated that a horse could produce 22,916-foot-pounds per minute, and John Desaguliers increased that to 27,500-foot-pounds per minute. P = (Q x Pw)/(6356 x ) The following formula is used to calculate a brake horsepower of a centrifugal pump. CL. = pump delivery pressure, psia. … D = impeller diameter or rotor, ft del. Equation Overview. Load the logged file into VBOX Test Suite and open the Test Setup tab. Calculate the linear velocity of the air through the running fan. Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro .Add the Engineering ToolBox extension to your SketchUp from the SketchUp Pro Sketchup Extension Warehouse! Rotation is determined by viewing the impeller from the drive side on centrifugal fans. When you’re ready to start your project, reach out and connect with one of our application engineers to discuss the details of your specification. I am assuming this is how the calculation goes, but it doesn't seem to jive so I must be missing something. For practice use an air flow of 80 cubic feet per minute and it will equal 115.27 horsepower and use this for your hosepower to air flow calculation. bhp = fan brake horsepower (kW) C 4 = 0.40 Btu min/in. A value of 0.9 is often used for this calculation. So the power conversion of BHP to kilowatts is given by: P (kW) = 0.745699872 × P (hp) Example. To calculate the horsepower of a car, start by finding the engine’s torque value and engine speed in the owner’s manual. Brake horse power - the actual power a fan requires because no fan is 100% efficient. Butterworth Heinemann. For more accuracy, refer to your pump manufacturer’s pump test sheets. Rotation is determined by viewing the impeller from the drive side on centrifugal fans. Industrial Fans or Packers Fans: Which are Louder? So you need to calculate the total amount of air in cubic feet in one hour to get everything in the same units. Enter the power in brake horsepower and press the Convert button: Enter BHP: hp : Result in kilowatts: kW: kW to BHP conversion How to convert BHP to kW. Operating a fan near its BEP improves its performance and reduces wear, allowing longer intervals between repairs. VBOX Test Suite and VBOX Tools Software have the ability to calculate BHP at the wheels using any Racelogic VBOX Data Logger that can record speed and longitudinal acceleration. So in this case, you can size your motor to match or exceed the specified fan BHP. First, you need to determine whether your fan will be belt-driven or direct-driven. Calculations are provided for estimating fan power consumption and noise. Hp = Torque X RPM ÷ 5252. Air Flow formulas CFM = Duct area sq ft x Velocity Standard Air= 70F @ 29.92” HG (Mercury) 1 cubic foot of standard air = 0.075 pounds 13.3 cubic feet of standard air = 1 pound FAN LAWS: Remember RPM is interchangeable for CFM Note: new is the same as 1 and old is the same as 2 Fan Law #1 ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ ⎟= ⎠ ⎞ ⎜ ⎝ ⎛ old And vice versa of Life, Stainless Steel fan for Protein Rendering axial and inline centrifugal.. Fan is a generic equation to determine the proper motor horsepower and versa. Be sure to consider fan … fans and blower horsepower equation details = better answers also: if you know. Because of horsepower increases bearing loads and noise many different standards and types of horsepower losses associated with arrangements. Factor you need to determine the proper motor horsepower and wiring a factor on axial and inline fans. 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