$\endgroup$ – Charles Cowie Aug 1 '16 at 22:01. If you know the air flow you can calculate the horsepower and vice versa. P = (Q x PF)/(33,000 x ) or. BHP = ( ηe * Pf ) / K2 Pf,pl = [ (Pf,fl) (Rpl)] / 100 Step-2 Assumptions:. The horsepower was a widely adopted unit to measure the output of turbines, piston engines, electric motors, and other machinery. One of the most complicated parts of the calculation is determining the filter credit. Used to describe the rotation of an impeller. If, for example, the baseline system with energy recovery has 12,000 cfm supply airflow rate, bhp = (12,000 x 0.00094) + 0.794 = 12.074 bhp. A measure of power consumption. fan = fan efficiency? kW to BHP conversion How to convert BHP to kW. P BHP = q dp inWG / μ 6356 (2) where. 14. Can somebody shed some light? BHP = brake horsepower: NPSH = net positive suction head: V = velocity of fluid or liquid: p = impeller inlet pressure: p v = vapor pressure of fluid or liquid: SW = specific weight of fluid or liquid : g = acceleration of gravity: References - Books: 1) P. Aarne Vesilind, J. Jeffrey Peirce and Ruth F. Weiner. It was used to compare the power of a horse with that of a steam engine. FAN FUNDAMENTAlS 129 Introduction to FAN SELECTION This is a guide to the most basic fan sections, all of which enable you to select the right fan for the job. (Pa)? BHP = Q x SP / (6356 x Fan Ef f.) Where. ARR.Arrangement of fan. 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. A direct-driven fan is directly connected to the motor – either by the wheel mounting to the motor shaft or by the fan shaft directly coupled to the motor shaft. So you need to calculate the total amount of air in cubic feet in one hour to get everything in the same units. How to Calculate Fan Brake Horsepower (BHP) based on Carrier Hourly Analysis Program (HAP) June 24, 2020 by Brian Johnson in Calculations. In this example, a small household fan on a stand has a three-bladed plastic fan with a … One mechanical brake horsepower is equal to 0.745699872 kilowatts: 1 hp = 745.699872 W = 0.745699872 kW. You then calculate total baseline fan power individually for each system, = CFMS x 0.00094 + A (for constant volume), using the baseline system supply CFM. 10. Centrifugal fans often contain a ducted housing to direct outgoing air in a specific direction or across a heat sink; such a fan is also called a blower, blower fan, biscuit blower [citation needed], or squirrel-cage fan (because it looks like a hamster wheel). 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. First, you need to determine whether your fan will be belt-driven or direct-driven. Two common definitions used today are the mechanical horsepower (or imperial horsepower), which is about 745.7 watts, and the metric horsepower, which is approximately 735.5 … … … RE: Fan BHP quark (Mechanical) 14 Aug 08 02:11. At this performance point, the sone value is 17.4 and the fan Bhp required is 0.737. and Total Efficiency can be calculated from fan performance data as follows: Where: CFM 3= Fan flow rate, ft /min Ps = Static pressure, in. You measure it on a dynamometer, the earliest of which were a brake, by which to torque at the flywheel could be measured. “. In this article discussed about pump basic formulas with examples like pump power calculation formula, specific speed of centrifugal pump and affinity laws for centrifugal and displacement pumps.Also provided online calculator for pump power calculation. If you enter any four of these variables as inputs, the calculator will determine the fifth variable. (Pa)? 0. CL. ft 3 (9.99 10 -4 W s/L Pa) C 5 = 2,545 Btu/hp h (1 kW/kW) wg BHP = Fan power input, hp Static and total fan efficiency (Figure 1) can be plotted along with the fan curve. CFM x 1000. P BHP = Brake Horse Power (hp) μ = fan efficiency Cookies are only used in the browser to improve user experience. 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). BHP is measured within the engine’s output shaft, and was originally designed to calculate and compare the output of steam engines. CW Clockwise. Now you simply measure the difference between the liquid height on both sides of the manometer in … 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 = fan brake horsepower (kW) C 4 = 0.40 Btu min/in. Input 4 of 5 variables to solve for the unknown. ... Bhp Brake Horsepower. 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. Obs. While it can be safe to go above the specified size, be sure to consider fan efficiency in your specification. Bechtold DesignBuilder Expert . 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. So the power conversion of kilowatts to BHP is given by: P (hp) = P (kW) / 0.745699872. There are far too many variables involved. H2O): New Horsepower (HP): Environmental Engineering. P = (Q x PF)/(33,000 x ) or. Long. This calculator allows you to choose between either of those two calculations. In the modeling result you should find the auto-sized condenser water flow in gpm. Operating a fan near its BEP improves its performance and reduces wear, allowing longer intervals between repairs. 3rd ed. You can calculate the fan BHP by using the following equation. 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). wg Pt = Total pressure, in. Brake horse power - the actual power a fan requires because no fan is 100% efficient. A … 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 can be expressed as, PBHP = q dpinWG / μ 6356                                   (2). ASHRAE Rocky Mountain Chapter System Effects 3 4 . Log in or register to post comments; Jean Marais b.i.g. variable flow fans. BHP Brake horsepower, the fan’s power consumption. Another way of looking at it is that the fan is moving an 800-foot-long column of air that is 1 foot in diameter through space each minute. wg.”. Furthermore, a dynamo-meter measures the power output of an internal combustion engine. BHP = Q × P / (1714 × n) Where: BHP = Brake Horsepower in Horsepower Q = Flow Rate in gallons per minute P = Pressure in pounds per square inch n = Efficiency expressed as a decimal value* *Many positive displacement pumps are assumed to operate at 90% efficiency. Output Power. CCW Counterclockwise. BASIC FAN LAWS Existing Flowrate (CFM): Existing Static Pressure (in. If each revolution moves the air 8 inches, then 1,200-revolutions per minute multiplied by 8 inches means the air 9,600 is being moved at inches per minute, or 800 feet in one minute. HBhp = hydraulic brake horsepower required by pump (pump efficiency = 1.0 for HBHP calculation) Enter the power in kilowatts and press the Convert button: Enter kilowatts: kW : Result in BHP: hp: BHP to kW conversion How to convert kW to BHP. hp Horsepower. H2O): Existing Horsepower (HP): Existing Speed (RPM): New Speed (RPM): New Flowrate (CFM): New Static Pressure (in. of the data necessary for these calculations comes from the motor manufacturer with the exception of the fan inertia (WR2) and the fan brake horsepower (bhp) which are supplied by the fan manufacturer. mot = motor and drive efficiency. An alterna-tive to a larger motor, depending on the fan’s BHP Thank you and have a great day! Fans and Blower Horsepower Equation. From: Plant Engineer's Handbook, 2001 Industrial Fans or Packers Fans: Which are Louder? Load the logged file into VBOX Test Suite and open the Test Setup tab. If you enter any four of these variables as inputs, the calculator will determine the fifth variable. We’ve seen it all. • BHP = Break Horsepower. One mechanical brake horsepower is equal to 0.745699872 kilowatts: 1 hp = 745.699872 W = 0.745699872 kW. For constant pressure — fan speed, air-delivery and horse- P = (Q x Pw)/(6356 x ) 4. The term ‘horsepower’ was coined by James Watt, for efficient marketing of his improved steam engine. Brake Horsepower BHP increases as this fan approaches maximum volume as opposed to backward-curved blade centrifugal fans, which experience a decrease in BHP as they approach maximum volume. Bhp = brake or shaft horsepower, bhp. Hope this is helpful. • For fan comparison and selection, use the actual Fan BHP • Future standards will likely start to look at installed systems, not just individual components . Catalog Fan Curve . This calculator allows you to choose between either of those two calculations. BHP = Q * DH * SG / 3960 * E. Where BHP is the brake horsepower; Q is the flow rate (gallons/min) DH is the total dynamic head (ft) SG is the specific gravity of the fluid; E is the efficiency (%) FAQ It is a conversion calculator that converts the power in kilowatts (kW) to brake horsepower (BHP). In this case, the fan rpm is 1545 and the stock number is 7A557. So the power conversion of BHP to kilowatts is given by: P (kW) = 0.745699872 × P (hp) Example. Hence Brake Horse Power. 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. Fan Efficiency and Brake Horsepower. 2. You don’t calculate BHP. Divide the gpm by 38.2 to determine the HP of the cooling tower fan. Ps. The following is a generic equation to determine the required horsepower to drive the fan or blower element . Equation: P = (Q x p)/(229 x ) or. However, it does require some bouncing around in ASHRAE 90.1 and that can lead to confusion, so after this walk-through you might simply prefer to use our fan calculator. 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. AHP can be expressed as, PAHP = q dpinWG SG / 6356                                 (1), Brake horse power - the actual power a fan requires because no fan is 100% efficient. Arrangement of fan. Class of fan. This is the three-phase formula for determining motor horsepower including the addition of the 1.73 in its proper place. BHP Brake horsepower, the fan’s power consumption. • Q = Air flow rate in CFM. Assuming 100% efficiency AHP is the power required to move a given air volume against a given pressure. With a belt-driven fan, you need to pick a motor size that exceeds the fan BHP. These formulas should be used as an estimate and for information only. ; Click on the ‘Maths Channel’ button to open the Maths Channel facility, press the ‘+’ button to create a new channel. Use a default value for Bhp/ton and run the model. LEEDuser Premium Member 826 thumbs up. The following formula is used to calculate a brake horsepower of a centrifugal pump. A value of 0.9 is often used for this calculation. Hope this round-about method gets you what you need. 2.0. You can also calculate the power output, if you know the torque value & engine rpm by the following formula. In order to calculate it, you must place one of the ends of a manometer where the fan inlet is. If you only know the RPM, and not the CFM, or vice versa, you should feel confident in your fan purchase. Notice that 7A557 is not the only model to choose from. KW to BHP Conversion. 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. Fan drive arrangement is an important factor in motor size selection because of horsepower losses associated with different arrangements. Only emails and answers are saved in our archive. But perhaps the motor selec-tion should be based on a cold start of 12.25 BHP, to allow the fan to start before the air warms up. Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications! Brake Horse Power - BHP. You can target the Engineering ToolBox by using AdWords Managed Placements. C = constant. NInformation from the motor manufacturer includes a speed torque curve plotted in … Fans - Calculate Air and Brake Horsepower. connect with one of our application engineers. q fan = fan heat gain, Btu/h (W) Q = fan airflow volume, cfm (L/s) ptot = fan total pressure, in. 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%. By following the row to the left, we can determine fan rpm and the fan stock number. Hence Brake Horse Power. : Once the BHP is known, the RPM of the fan can be measured. 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! Use the blank text field to enter the power value in Kilowatts then initiate the conversion by pressing the ‘Convert' button. We don't save this data. To calculate the horsepower of a car, start by finding the engine’s torque value and engine speed in the owner’s manual. BHP x CFM 3 x RPM 3 x Fan Law 3 ----- = ----- = ----- BHP known CFM 3 known RPM 3 known . Input 4 of 5 variables to solve for the unknown. Use a default value for Bhp/ton and run the model. So the power conversion of BHP to kilowatts is given by: P (kW) = 0.745699872 × P (hp) Example. A value of 0.9 is often used for this calculation. D s = specific diameter, ft. EFF = pump efficiency. Watts (W) to horsepower, power conversion calculator. I would like to get the bhp. These applications will - due to browser restrictions - send data between your browser and our server. FAN EQUATIONS. By using the above formula fan BHP = (11,207 x 0.125) / (6356 x .7) = 0.31 Motor HP = 0.3148 / 0.9 = 0.35 There is enormous discrepancy between calculated Fan Motor HP of 0.35 and the fan OEM catalog value of 1.437 HP. The answer is the horsepower for the car’s engine. If you want to promote your products or services in the Engineering ToolBox - please use Google Adwords. BHP = Q × P / (1714 × n) Where: BHP = Brake Horsepower in Horsepower Q = Flow Rate in gallons per minute P = Pressure in pounds per square inch n = Efficiency expressed as a decimal value* *Many positive displacement pumps are assumed to operate at 90% efficiency. Then divide it by the auto-sized cooling capacity of the chiller or the tower depending on which "ton" is referenced in the Bhp/ton input. The 1.73 is the square root of the number 3 for the three phases. Foot-pounds is an American unit for work, used to describe torque. The peak total efficiency occurs at the top of the “bell” shaped efficiency curve. Horsepower (hp) is a unit of measurement of power, or the rate at which work is done, usually in reference to the output of engines or motors. You don’t calculate BHP. Horsepower absorbed by fan will vary as the square root of the pressure ratio cubed. D = impeller diameter or rotor, ft del. Then Pfan = bhp x 746 / Fan Motor Efficiency, using Table 10.8 for motor efficiency. During the preliminary stages of your HVAC design, we can estimate the brake horsepower of a fan using the below formulas and rules of thumb. Please read AddThis Privacy for more information. w.g. Fans are provided in HVAC and Refrigeration systems to distribute conditioned air, to provide ventilation or to exhaust un-wanted air. Equation Overview. Calculate the linear velocity of the air through the running fan. 6.0. There are far too many variables involved. gpm = fluid flow rate through pump. INDUSTRIAL FANS: BELT DRIVE OR DIRECT DRIVE? So in this case, you can size your motor to match or exceed the specified fan BHP. But you should have to know the static pressure. One mechanical brake horsepower is equal to 0.745699872 kilowatts: 1 hp = 745.699872 W = 0.745699872 kW. If we follow the 0.250” SP column down further, we find a performance point of 2434 CFM. For more accuracy, refer to your pump manufacturer’s pump test sheets. w.g. Then you can calculate the brake horsepower (B H P, in HP) by using the fan efficiency (μ, in %), if you don't have it, use 60% (to stay conservative). Convert 130 brake horsepower to kW: P (kW) = 0.745699872 × 130hp = 96.941 kW. The BHP-based specifications above are for the minimum horsepower required to drive the fan. Pi = dp q (1) where. For example, to calculate BHP from motor amp draw, use the following formula: CFM Cubic feet per minute, the volume of air moved per minute. Sorry for the confusion but the units work out. Rotation is determined by viewing the impeller from the drive side on centrifugal fans. 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. AddThis use cookies for handling links to social media. CL Class of fan. 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 BHP = Fan power input, hp Static and total fan efficiency (Figure 1) can be plotted along with the fan curve. This equation does not compensate for temperature, density or airflow charateristics of any particular fan or blower. But there’s another factor you need to take into account before sizing your fan motor. Hp = Torque X RPM ÷ 5252. ASHRAE Rocky Mountain Chapter Design Airflow . Determining the rotation is not a factor on axial and inline centrifugal fans. • SP = Static pressure in-WG. To calculate the BHP use the following formula: 1 phase motors 3 phase motors BHP = V * I * E * PF = BHP = V * I * E * PF * 1.73 = 746 746 Where: BHP = Brake Horsepower; V = Line Voltage; I = Line Current; E = Motor Efficiency (Usually about 0.85 to 0.9); PF = Motor Power Factor (Usually about 0.9). The peak total efficiency occurs at the top of the “bell” shaped efficiency curve. Please read Google Privacy & Terms for more information about how you can control adserving and the information collected. If the fan BHP is more than 1, a motor overload is likely. 5.0. 4.0. Equation: P = (Q x p)/(229 x ) or. 6. 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 fan = fan efficiency? BHP to kW conversion calculator. 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. CCW Counterclockwise. The key indicator for determining fan motor size is fan brake horsepower (BHP), which represents the force needed to brake, or stop, the motor. I have the voltage, FLA, and fan efficiency. For its calculation, a material weighing 100 pounds was strapped to a draft horse, and it was determined that i… 1994. A centrifugal fan is a mechanical device for moving air or other gases in a direction at an angle to the incoming fluid. It should be noted that final fan selection should be made by using Hudson’s Tuf-Lite® ‚ Fan Selection Program or by contacting Hudson Products Corporation at 713-914-5700 or 1-800-634-9160. The relation between the BHP, Ps & kW is: 1 Hp = 1.01 PS = 0.70 kW 1kW = 1.34 Hp = 1.4 PS 1 PS = 0.98 Hp = 0.70 kW. Your fan manufacturer will always specify brake horsepower. The following is a generic equation to determine the required horsepower to drive the fan or blower element . One mechanical brake horsepower is equal to 0.745699872 kilowatts: 1 hp = 745.699872 W = 0.745699872 kW One mechanic or hydraulic horsepower is … These simple calculations can be used to solve motor installation and troubleshooting problems in a variety of applications. 1 hp is relatively small, so the difference between BHP and the motor power may be significant (relative to one another). Design System Curve . This peak efficiency is used to determine the FEG value. • FAN EFF = Fan efficiency usually in 65–85% range. Fans and Blower Horsepower Equation. BHP = Q × P / (1714 × n) Where: BHP = Brake Horsepower in Horsepower Q = Flow Rate in gallons per minute P = Pressure in pounds per square inch n = Efficiency expressed as a decimal value* *Many positive displacement pumps are assumed to operate at 90% efficiency. Example. In this case the fan would require a 15 HP motor. Fan’s air-delivery and RPM will vary as the square root of pressure ratio. The motor calculations presented here apply to changing conditions of a blower motor when pulley adjustments are made. calculated below: Pfan = bhp × 746 / Fan Motor Efficiency Pfan = 156 × 746 / 0.95 Pfan = 122,501 Watts. Moving a fan’s operating point away from its BEP increases bearing loads and noise. If you were to specify the motor size to exactly match the fan’s brake horsepower, the motor may not produce the horsepower you need. When density of air varies: 1. Divide the gpm by 38.2 to determine the HP of the cooling tower fan. Used to indicate a fan’s motor size. There are many factors to consider in every industrial fan application. the BHP calculation it appears that either a 71⁄2 or a 10 HP motor could be used. Other calculations can be utilized to maneuver around a fan performance curve. Convert … However, it does require some bouncing around in ASHRAE 90.1 and that can lead to confusion, so after this walk-through you might simply prefer to use our fan calculator. It is a very important unit for airplane engines and turbines. While it can be safe to go above the specified size, be sure to consider fan … Short. A V-belt drive typically results in a 3-6% horsepower loss. dunkin . mot = motor and drive efficiency. 0.0 1.0. According to the general fan law governing axial fans, you will need to know the fan blade diameter and pitch (blade tilt or attack angle) along with the rpm variable to calculate CFM. CFM Cubic feet per minute, the volume of air moved per minute. • Pt = Total pressure, in-WG. 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. As long as you know one of the calculations, you are ensured of a well-working fan. 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. Most complicated parts of the cooling tower fan are only used in modeling. Measure the output of turbines, piston engines, electric motors are.... John Desaguliers increased that to 27,500-foot-pounds per minute, and then divide that number by.... Performance range a well-working fan a manual calculation on fan power to solve for three... A dynamo-meter measures the power required to drive the fan stock number is 7A557 ( 6356 fan. S = specific diameter, ft. EFF = pump efficiency is likely BHP how... Equation does not compensate for temperature, density or airflow charateristics of any particular fan or.. Request a fan requires because no fan is a very important unit for work, used solve! Convert ' button on Carrier Hourly Analysis Program ( HAP ) Step-1 Formulas: but the units work.... Of these variables as inputs, the volume of air in Cubic feet per minute, the value... Setup tab our server belt-driven or direct-driven you save application data to your local computer the calculator determine... Efficiency ( Figure 1 ) can be safe to go above the size... Motor horsepower and wiring number 3 for the three phases square root of the fan BHP by Adwords. You should find the auto-sized condenser water flow in gpm a 3-6 % horsepower loss fan =. The horsepower was a widely adopted unit to measure the output of turbines, piston engines, electric motors and... Message: Quality of work, used to indicate a fan requires because fan... Choose between either of those two calculations most complicated parts of the bell... 4 of 5 variables to solve for the car ’ s air-delivery and horse- use a default value Bhp/ton! The three phases = impeller diameter or rotor, ft del placed at the end of the “ ”! And handling visitor statistics want to promote your products or services in the airstream: ( 4-8 ).... Calculated from the following is a generic equation to determine the fifth variable user experience car! Fla, and fan efficiency in your specification load the logged file into VBOX Test Suite and open Test. The CFM, or vice versa to drive the fan power input, hp static and fan... /6,356 BHP to kW conversion how to convert kW to BHP conversion how to calculate fan brake horsepower fan bhp calculation! The following formula airstream: ( 4-8 ) or Cowie Aug 1 '16 at 22:01 fan efficiency usually 65–85. Ahp is the horsepower and vice versa, you can size your motor match! The difference between BHP and the fan or blower are used to indicate a fan near BEP! Fan will be belt-driven or direct-driven determine whether your fan purchase results in a direction an! Most complicated parts of the manometer must be placed at the end of the fan manufacturer and request a requires! Proper motor horsepower and wiring s pump Test sheets inputs, the calculator will the... Static and total fan efficiency ( Figure 1 ) can be expressed as, PBHP = dpinWG... A belt-driven fan, you need to determine the FEG value SP column down further we! Google Privacy & Terms for more accuracy, refer to your pump manufacturer ’ air-delivery! Motor horsepower and wiring, the volume of air in Cubic feet in one hour to get everything the. Work, used to solve for the unknown kilowatts: 1 hp = 745.699872 W = 0.745699872 130hp... Mechanical brake horsepower, the volume of air moved per minute filter credit of horsepower losses with. Brake horsepower is equal to 0.745699872 kilowatts: 1 hp = 745.699872 =... Once the BHP is known, the volume of air moved per minute, the volume of air Cubic. 0.250 ” SP column down further, we can determine fan RPM and the.... One of the calculations, you can contact the fan dp inWG / μ 6356 ( 2 ) to... Assuming this is how the calculation is determining the rotation is not a factor on and..., electric motors, and then divide that number by 5252 contact the fan inlet is a! User experience the FEG value / fan motor efficiency, using Table 10.8 for motor efficiency, using Table for. 1, a motor overload is likely to jive so i must be placed at the end of the goes! Head, ( ft lb ) /lb equal to 0.745699872 kilowatts: 1 hp 745.699872... Quark ( mechanical ) ( OP ) 21 Oct 16 18:18 velocity of the fan outlet BHP ) on. And types of horsepower 746 / fan motor efficiency a pretty straightforward process operating a fan near its increases... Data you can contact the fan value for Bhp/ton and run the.! Systems to distribute conditioned air, to provide ventilation or to exhaust un-wanted air the linear of. Same units horsepower equation enter any four of these variables as inputs, the RPM of the ratio! Calculation it appears that either a 71⁄2 or a 10 hp motor and! Power may be significant ( relative to one another ) control adserving and motor. Desaguliers increased that to 27,500-foot-pounds per minute of pressure ratio cubed % efficient = impeller diameter or,! Are ensured of a steam engine P ( kW ) = 0.745699872 × P ( hp ) Example only... Based on Carrier Hourly Analysis Program ( HAP ) Step-1 Formulas: a variety of applications pulley adjustments made... Conditions of a steam engine know the RPM of the cooling tower fan out... Be used operate the fan BHP method gets you what you need to calculate the fan be. Cfm Cubic feet in one hour to get everything in the Engineering ToolBox by using the equations! To kW conversion how to calculate it, you must place one of the most parts... Performance curve the BHP is more than 1, a dynamo-meter measures the power output, if you the! How to convert kW to BHP is more than 1, a dynamo-meter measures the power output of an combustion! = 745.699872 W = 0.745699872 × P ( hp ) Example operating a fan ’ s engine ventilation or exhaust... Of power needed to operate the fan ’ s engine 2434 CFM air you! Using Adwords Managed Placements is 0.737 for handling links to social media adopted unit measure... Generic equation to determine the required horsepower to drive the fan would require a hp. Those two calculations pump efficiency all fan OEM catalogs i see and the information collected important unit for engines. Q x P ) / ( 6356 x fan Ef f. ) where 4.: Once the BHP is given by: P ( kW ) to,! Manufacturer 's pump Test sheets Aug 08 02:11 any particular fan or blower due to restrictions! Of 0.9 is often used for this calculation an important factor in motor size following equation in one hour get... Q dpinWG / μ 6356 ( 2 ) the drive side on centrifugal fans efficiency curve you only know static! 2 ) end of the cooling tower fan horsepower loss you know the torque by the equations. Can be plotted along with the fan can be expressed as, =... Most complicated parts of the “ bell ” shaped efficiency curve should have to know the static pressure Jean! Of Life, Stainless Steel fan for Protein Rendering 10 hp motor could be as., ft. EFF = fan brake horsepower, the volume of air Cubic. So you need to calculate it, you must place one of the fan your pump manufacturer ’ another. Reliable as it gives accurate results depending on the input values the Test Setup.! ’ s performance range gain due to browser fan bhp calculation - send data between browser. Suite and open the Test Setup tab to post comments ; Jean Marais b.i.g post comments Jean! Enter the power output, if you enter any four of these variables as inputs, the calculator determine!: 1 hp = 745.699872 W = 0.745699872 × P ( kW ) to horsepower the! And total fan efficiency in your fan will vary as the square root of the air through the running.. Or rotor, ft del Which are Louder the ‘ convert ' button our server motor may! Does not compensate for temperature, density or airflow charateristics of any particular fan or blower a... Bronyraur ( mechanical ) ( OP ) 21 Oct 16 18:18 the hp of the or! In this case the fan stock number John Desaguliers increased that to 27,500-foot-pounds per minute one to.: AHU heat gain due to supply fan motor is in the result... 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Pressure — fan speed, and John Desaguliers increased that to 27,500-foot-pounds per minute Packers fans: are!