Perhitungan Tenaga Kuda Rem Cepat & Akurat – Rumus Sederhana & Panduan Langkah demi Langkah

Menghitung Brake Horsepower

Menghitung Brake Horsepower sangat mudah bagi siapa pun, jika dia mengetahui Rumus BHP yang tepat.

Di sini, dalam artikel ini, Kita akan Membahas perhitungan persamaan Brake horsepower secara detail sehingga Anda dapat menghitung BHP dengan sangat cepat.

Rumus untuk perhitungan Break horsepower adalah

1.BHP = (Torque × RPM )/5252, where torque is lb -ft and n = revolution per min.

2.BHP = BP /33000,where BP (in watt ) = Torque×2π×RPM (RPM in min. ) Where torque in the formula of BP is in lb -ft

3.BHP =BP (in Watt ) / 746 we get it in horse power ,since 1 HP = 746 watt

Untuk Menghitung Brake Horsepower equation, kita perlu mengeksis unit semua parameter dalam pikiran.

Di bawah Anda dapat memeriksa juga rumus sederhana dan derivasi secara detail.

Sebelum mengetahui cara menghitung BHP, pertama kita harus mengetahui tiga istilah penting, apa itu power, Horsepower dan Brake Horsepower?

Apa itu Power?

Power didefinisikan sebagai laju di mana kerja dilakukan atau laju di mana energi ditransfer.

Sederhana, Laju melakukan kerja disebut power.

• P = E/t
• P = F·v
• P = V·I
• P = F.s ( For linear Motion )
• P = τ·ω ( For Rotary Motion )

For Rotary motion, kita mencari power sehingga mudah bagi Anda untuk memahami BHP.

Power = (Force × Distance ) / Time

Power = [Force × Distance (Per Revolution) ] / Time ( in min. )

Distance per revolution = 2π × Radius

Distance per revolution per time = 2 π × Radius × RPM

Kita tahu bahwa Torque = Force × Perpendicular Distance ( Radius )

Now, Force = Torque / Radius

As we know Power = [ Force × Distance (Per Revolution ) ] / Time (in min. )

Now,putting the value of force and Distance

We get, Power = {Torque/Radius} × { 2 π × Radius × RPM }

Finally, Power ( in Watt ) = Torque × 2π × RPM. Or,

Power (in watt ) = (Torque × 2π × RPS )/60

For Calculating Brake Horsepower, first we have to understand about horsepower

Apa itu Horsepower?

Horsepower (hp) adalah satuan pengukuran power atau laju di mana kerja dilakukan, biasanya sehubungan dengan keluaran mesin atau mesin.

Terdapat sejumlah standar dan tipe horsepower yang umum. Dua definisi umum yang digunakan saat ini adalah mechanical horsepower (atau imperial horsepower), yang sekitar 745,7 watt, dan metric horsepower, yang sekitar 735,5 watt.

James Watt, pionir mesin uap, ingin mengukur performa mesinnya terhadap kuda yang sebelumnya mengoperasikan.

Nanti, satuan ini digunakan untuk mengukur keluaran berbagai jenis mesin piston, turbin, motor listrik serta mesin lainnya.

Horsepower Equation

1 hp (mechanical) = 33,000 ft·lbf/min = 550 ft·lbf/s

1 HP = 550×0.3048×0.4535 = 76.04 kgf/m/s

1 HP = 76.04×9.80 =746 Watts where 1 ft = 0.3048 m and 1 lb = 0.4535 kg

Or, we can say that One horse power is equal to work done by a single horse in lifting the weight of 75 kg to one metre height in one second.

1 HP (Metric Horsepower ) = 75 kgf m/s

1 HP = 75×9.8066 m/s2 . m/s = 735.498 Watt

We understand that horse power is unit of measurements of power.

HP is defined as

1 HP = 550 ft-lb per second

1 HP = 550 ft -lb per second × 60

1 HP = 33,000 ft -lb per minute

Bagaimana mengonversi power ke HP

Untuk mengubah power menjadi HP, kita cukup membagi power dengan 33000

HP = Power (in ft -lb per minute ) ÷ 33000

We know that indicated power is power developed by engine when it burns.

If Indicated power is in the unit ft -lb per min and we divide that Indicated power by 33,000 then we get Indicated Horse power

IHP = IP (in ft-lb per minute ) /33000

But IP is mainly in watt

Formula for IP for 4 stroke engine is (PLAN x n) / 2

IHP= ((PLAN x n) / 2) ÷ 4500

(where, P = Mean effective pressure in kg/cm², L = Length of stroke, A = Area of piston in cm², N = RPM of crankshaft, n = Number of cylinders)

Or

If Indicated power is in watt then divide it by 746,

IHP = IP (in watt ) /746

Similar for BHP

Brake Power (lb -ft per min. ) = Torque × 2π × RPM lb -ft per min.

Divide by 33000 on both sides

BHP = (Torque × 2π ×RPM )/33000

BHP = (Torque × RPM )/5252

In both above formula torque unit is ft -lb.

Other conversion unit of HP

As per the conventions, 1 HP equals to:

• 745.5 watts
• 1.01389 ps
• 33,000 ft lbf/min
• 42.2 BTU/min

Apa itu Brake Horsepower?

Brake horsepower adalah pengukuran power mesin di flywheel atau crankshaft setelah mesin kehilangan power karena drive train dan resistensi gearbox.

Note :- If we know power at the flywheel or crankshaft of the engine in ft -lb per min. ( this is called brake power ).To get Brake Horse power ,we should only divide with 33,000 i.e BHP = BP (in ft -lb per min. ) /33000

Other wise BHP = (Torque × RPM ) /5252, unit of torque is ft -lb

Or simply, BHP = BP (in Watt ) / 746

Bagaimana Brake horse power diukur?

BHP diukur dengan menerapkan torsi resistensi sebagai rem pada Shaft .Akibat gesekan, panas dihasilkan yang dihilangkan dengan mengalirkan pendingin seperti air.

Brake Horse Power formula

1.BHP = (2πnFR ) / 33000,where 2πnFR = Power in lb -ft per min.

( n =No. Of Revolution per minute,F = Break Resisting Force ,R = Radius at which force is applied)

2.Break Horse Power for Shaft in torque form

Power = Torque x 2π x Revolutions / Minute

A ) BHP = (2πnT ) /33000 ,2πnT = Power in lb-ft per min.

n =no. of revolution per minute of the engine , T = Torque applied on shaft.

B )BHP = (Torque × RPM ) /5252

3.BHP = BP in watt / 746

Bagaimana Brake horsepower dihitung

Brake Power (Power at the shaft )= 2πnT watt

As we know that 1 H.P. = 33,000 lb-ft. / min.

Divide both side by above value we get,

Bhp = (Torque × n )/5252

Remark :-Here’s what we’ve got for the equation

33,000 lb-ft / min = lb-ft. x 2π x revolutions/min

Dividing each side by 2π (6.28315) and we get 5,252 lb-ft / min = lb-ft. x revolutions / min.

Next,we divide each side by 5252,we get final equations :-

1 Horsepower = Torque x R.P.M. / 5252

Note :-Due to this math, lb-ft of torque and horsepower will always be the same at 5,252 RPM.

Finally We have ,

1.BP = 2πnFR in Watt

2π =6.2831853,n = No.of revolution per minute

F=Resisting force

R= Radius at which force is applied

2.BP = 2πnT in lb -ft per min.

2π =6.2831853

n = No.of revolution per minute

T=Torque Applied on shaft

3.BHP = Power (in lb -ft per min ) /33000

4.BHP = (torque x RPM) ÷ 5,252

Remember, Unit of torque is ft-lbs

Let us know How this formula came,

Brake horse power is the difference between Indicated power and friction loss.This is the actual power delivered to the power.

The power supplied to the propeller for useful operation is known as the brake horsepower (bhp).

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The difference between the indicated and the brake horsepower is known as friction horsepower, which is the horsepower needed to overcome mechanical losses, such as the pumping action of the pistons, the friction of the pistons and the friction of all other moving parts.

Units in calculation of brake horsepower

The measurement of the bhp of the engine involves the measurement of a quantity known as a torque or a twisting moment. Torque is the product of the force and the distance of the force from the axis on which it is acting.

As we know BHP = (Torque ×n ) /5252, where Torque is lb -ft and n = revolution per min.

Torque = Force × Displacement

Torque :-

Torque is a measure of force or load that cause rotation of the shaft around axis.

How Torque is Expressed

Generally,Torque is Expressed in pound-feet (lb-ft) or pound-inches (lb-in).

Note:- Torque should not be Confused with work ,Which is expressed in inch-pounds (in-lb) or foot-pounds (ft-lb).

How to measure Torque

For measuring torque,there are so many devices like dynamometer or a torque meter.

Prony Brake is one of the very simple type of device which is used for calculations in torque.

Baca Juga: Difference between 2 stroke and 4 stroke engine

Relation of BHP in Other unit system

Relationship of BHP for Calculating Brake Horsepower with other unit system

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

Brake-Horse-Power (bhp), Pferdestärke (PS) which is the German translation of horsepower. Metric system uses kilowatt (kW) unit of measurement while in the case of the imperial/British system, it is ‘feet-pound-force-per-second’ (fps).

Calculating Brake Horse power for positive Displacement Pump

BHP = Q × P / (1714 × n)

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 work at 90 percent efficiency. A value of 0.9 is sometimes used for this measurement. For more precision, refer to the test sheets of your pump manufacturer.

Brake Horsepower [HP] = Flow Rate [GPM] × Pressure [PSI] / (1714 × Efficiency)

Brake Horse Power calculation for pump

To convert MGD to GPM, use the following:

Wikipedia :- Horse power

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