# pump efficiency calculation example

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• ### Calculating the Efficiency of Centrifugal Pumps|

2020-12-7 · Pump Efficiency = Water horsepower/mechanical horsepower = 8.84/20 * 100 = 44% In this hypothetical example, our centrifugal pump has a peak efficiency of 44%. Which makes it a relatively poor design. Broadly speaking, large and medium centrifugal pumps have efficiencies ranging from 75% to …

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• ### Pump Efficiency - uaex.edu

2014-4-16 · determined, pump efficiency is a simple calculation that can be determined by this formula: If the horsepower input to the previous centrifugal pump example was 33 horsepower, the pump efficiency would be: h = 24.2 33 = 0.73 or 73% h = hp water of pump hp Deepwell turbine pump …

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• ### Pump Power Calculation Formula | Specific speed of a ...

2019-6-24 · So continuing with the above example, the overall efficiency of the pump is 0.9 x 0.91 x 100 = 82%. Typical overall efficiencies for different types of hydraulic pumps are shown in the table below (source: Bosch Rexroth): Overall efficiency is used to calculate the drive power required by a pump at a given flow and pressure.

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• ### Hydraulic Pump Efficiency and How To Calculate It ...

2012-1-20 · The overall efficiency of a centrifugal pump is simply the ratio of the water (output) power to the shaft (input) power and is illustrated by the equation below: E f = P W P S Where:

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• ### Pump Efficiency—What Is Efficiency?

2008-4-19 · (determine the pump efficiency from the pump performance curve prior to doing this calculation) The power absorbed by the pump is given by equation (see reference 1):  SPECIFIC GRAVITY. SG TOTAL HEAD (HP (ft fluid) FLOW . q (Usgal/min) PUMP EFFICIENCY ( BRAKE HORSEPOWER. P(hp) Table 6 Power to the pump shaft calculation results. PUMP SELECTION DATA

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• ### CALCULATION EXAMPLE - pumpfundamentals.com

2008-4-19 · Calculate the specific speed and predict the pump efficiency. Calculate the suction specific speed and Thoma number and check the prediction of the Thoma number regarding cavitation. 4. Calculate the temperature rise of the fluid within the pump …

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• ### How To Calculate Hydraulic Pump and Motor

2011-8-24 · Worked Example 1 Q: Work out the Pump Efficiency, Power consumption by the pump and the motor. In 1994 the system was designed to pump at a Total dynamic head of 75m and an average flow rate of 6720m3 per day. The KSB Multitek 125 10.2 was chosen with the 270mm diameter impellor. The motor is a 92% efficient 110kw motor, Good practise C. 1994.

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• ### Pump Efficiency - uaex.edu

2014-4-16 · determined, pump efficiency is a simple calculation that can be determined by this formula: If the horsepower input to the previous centrifugal pump example was 33 horsepower, the pump efficiency would be: h = 24.2 33 = 0.73 or 73% h = hp water of pump hp Deepwell turbine pump …

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• ### What is pump efficiency calculation

2021-3-21 · For example, dividing the standard cost of 2.25 per tire pound by your 2.50 per tire pound results in a manufacturing efficiency of 0.9, or 90 percent. This means you are 10 percent less efficient than your typical competitor. Measure your manufacturing ... What is pump efficiency calculation ...

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• ### (PDF) Energy Efficiency in Pump System - ResearchGate

2010-8-2 · Pump Efficiency = ----- Power input to the pump shaft. Where, ... Illustration of calculation method outlined . ... Pump E fficiency Example.

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• ### Pump Efficiency - an overview | ScienceDirect Topics

Bernd Stoffel, in Assessing the Energy Efficiency of Pumps and Pump Units, 2015. The pump efficiency η BEP at the point of best efficiency (BEP) is determined by the total energy losses that arise in a pump. These total losses originate from various individual losses of different physical nature. Of particular importance are through-flow losses and disc friction losses.

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• ### Pump power calculations - sample problem -

Pump shaft power requirement = Theoretical power requirement pump efficiency. For a pump that has been already purchased or has been ordered for manufacturing, the efficiency can be determined using the pump performance curves provided by pump manufacturer. Here the problem statement has specified pump efficiency to be 70%.

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• ### Worked Example 1 - tea.ie

2011-8-24 · Worked Example 1 Q: Work out the Pump Efficiency, Power consumption by the pump and the motor. In 1994 the system was designed to pump at a Total dynamic head of 75m and an average flow rate of 6720m3 per day. The KSB Multitek 125 10.2 was chosen with the 270mm diameter impellor. The motor is a 92% efficient 110kw motor, Good practise C. 1994.

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• ### Pump ED 101

2016-11-12 · A common example of such a machine is the “heat engine” which uses energy in the form of heat to produce mechanical energy. ... etc) also affect pump efficiency, but the impeller and volute have the greatest influence. Lets start our investigation of centrifugal pump efficiency with the impeller. ...

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• ### Example - Calculation of Heat Pump | nuclear-power.net

2021-5-8 · Example – Heat Pump – Heating and Air Conditioning. A reversible heat pump has a coefficient of performance, COP = 3.0, when operated in the heating mode.Its compressor consumes 1500 W of electric energy.. Calculate the amount of heat (Q hot) the heat pump can add to a room?If the heat pump were turned to the cooling mode (i.e. to act as an air conditioner in the summer), what …

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• ### Manual for the Design of Pipe Systems and Pumps

2021-4-14 · 3. The pump type chosen must correspond to product viscosity, product density, temperature, system pressure, material of the pump, shearing tendency of the product etc. 4. The pump size must conform to the flow rate, pressure, speed, suction conditons etc. As a manufacturer and supplier of centrifugal pumps and positive displacement pumps we

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• ### How to Calculate NPSH of Pump with Examples and

2017-5-21 · EXAMPLE 2: Calculation of NPSH of Pump for Liquid at Boiling Point or Pressured Drum. Figure below illustrate piping configuration to calculate NPSH of pump for liquid at boiling point. NPSH of pump – at boiling point. SG of n-butane at 100 deg F = 0.56

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• ### 15-Equipments efficiency calculation in power plant

2020-7-4 · Pump efficiency is the ratio of to the pump hydraulic power to the Pump shaft power. Example: A pump is consuming 20 KW to deliver 72 M3/hr of water at height 55 meter, calculate its efficiency.

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• ### Centrifugal Pump Efficiency Calculation - Chemical ...

2016-10-27 · Centrifugal pump efficiency equation. Centrifugal pump efficiency = Power Output from Pump Power Input to Pump * 100. Centrifugal Pump Efficiency and Discharge Temperature. Actual Power required in pump can also be derived from Heat balance across the pump. Difference in Heat flow Outlet and Heat flow inlet is the actual power required for the ...

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• ### How To Calculate Hydraulic Pump and Motor

2015-2-2 · Overall efficiency is simply the product of volumetric and mechanical/hydraulic efficiency. So continuing with the above example, the overall efficiency of the pump is 0.9 x 0.91 x 100 = 82%. Overall efficiency is used to calculate the drive power required by a pump at a given flow and pressure.

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• ### How to Define & Measure Centrifugal Pump

2020-11-5 · The pump efficiency is a simple calculation once you have the speed and torque data. Wire-to-water efficiency is the amount of energy that is imparted to the pumped fluid (water) divided by the energy that was introduced by the electrical system—or the work completed divided by the work applied. ... For example, a motor that is 90 percent ...

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• ### DOE Indexes for Pump Efficiency Require Close

The following example illustrates the improvements to pump efficiency after hydraulic redesign using the DOE’s PEICL calculation. DOE equation. Where PER represents a pump’s power consumption at a weighted average of three or four load points. See the adjacent areas for more information on PER. PEIcl Pump Example:

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• ### Centrifugal pumps Pump selection: a real example

2010-8-1 · Pump selection: a real example ... The efficiency for this manufacturer was the highest of all, reaching 73.9% at BEP. Supplier number two was eliminated because of the high investment cost ... necessary to find, through calculation, impeller diameters yielding a discharge

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• ### Energy Efficiency Considerations in Pumps and Pump

Improving Pump Efficiency Don’t Design it Wrong Invest in a good predesign Decide how it will operate before messing around with layouts and equipment selection Pick pumps to operate efficiently operate at conditions where the pump will actually operate most of the time Consider variable speed drives or smaller pumps to

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• ### Worked Example 5: Pump Requirement | ITACA

This is the general equation for calculating the pressure requirement for a pump. Combined with two other Equation (20) which gives the power that needs to be supplied to the pump (W in):. and Equation (21) which gives the electrical power required (W e):. it is possible to derive the pump specification for a series of different diameter delivery pipes, assuming a given volumetric flow rate.

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• ### FLUID MECHANICS TUTORIAL No.8B CENTRIFUGAL PUMPS

2005-12-8 · WORKED EXAMPLE No. 2 If only the 125 mm pump in WE 1 is available, what speed must it be run at to obtain the required head and flow? What is the efficiency and input power to the pump? SOLUTION B is the operating point so we must calculate HC and QC 2 C 2 C 2 B C C B 0.016 119141Q Q

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• ### Determination of vacuum pump operational efficiency

2014-3-29 · For practical purposes, the efficiency at the operational levels can be considered. For example, if the pump has to be operated at 400mmHg vacuum, the efficiency would [email protected], March 2014 15 be operated at 400mmHg vacuum, the efficiency would be 79%. Or, we may consider that vacuum pump is giving 79% of the rated airflow. 16.

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• ### Pump Efficiency Calculation Excel Spreadsheets ...

2020-4-17 · Download free Pump Efficiency Calculation Excel. This tool calculates the energy efficiency and energy performance of water (& waste-water) pumping facilities. To determine pump efficiency you’ll need to convert the capacity and head units into horsepower output. Capacity is the total water output, expressed in gallons per minute. Head is the distance from the […]

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• ### 15-Equipments efficiency calculation in power plant

2020-7-4 · Pump efficiency is the ratio of to the pump hydraulic power to the Pump shaft power. Example: A pump is consuming 20 KW to deliver 72 M3/hr of water at height 55 meter, calculate its efficiency.

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• ### Centrifugal Pump Efficiency Calculation - Chemical ...

2016-10-27 · Centrifugal pump efficiency equation. Centrifugal pump efficiency = Power Output from Pump Power Input to Pump * 100. Centrifugal Pump Efficiency and Discharge Temperature. Actual Power required in pump can also be derived from Heat balance across the pump. Difference in Heat flow Outlet and Heat flow inlet is the actual power required for the ...

Get Price
• ### How To Calculate Hydraulic Pump and Motor

2015-2-2 · Overall efficiency is simply the product of volumetric and mechanical/hydraulic efficiency. So continuing with the above example, the overall efficiency of the pump is 0.9 x 0.91 x 100 = 82%. Overall efficiency is used to calculate the drive power required by a pump at a given flow and pressure.

Get Price
• ### DOE Indexes for Pump Efficiency Require Close

The following example illustrates the improvements to pump efficiency after hydraulic redesign using the DOE’s PEICL calculation. DOE equation. Where PER represents a pump’s power consumption at a weighted average of three or four load points. See the adjacent areas for more information on PER. PEIcl Pump Example:

Get Price
• ### Energy Efficiency Considerations in Pumps and Pump

Improving Pump Efficiency Don’t Design it Wrong Invest in a good predesign Decide how it will operate before messing around with layouts and equipment selection Pick pumps to operate efficiently operate at conditions where the pump will actually operate most of the time Consider variable speed drives or smaller pumps to

Get Price
• ### Determination of vacuum pump operational efficiency

2014-3-29 · For practical purposes, the efficiency at the operational levels can be considered. For example, if the pump has to be operated at 400mmHg vacuum, the efficiency would [email protected], March 2014 15 be operated at 400mmHg vacuum, the efficiency would be 79%. Or, we may consider that vacuum pump is giving 79% of the rated airflow. 16.

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• ### Experiment 9: Centrifugal Pump - Islamic University of Gaza

2013-4-25 · constant power or efficiency on a graph of pump head plotted against pump discharge. These allow engineers to see the maximum efficiency of a pump over a range of operating parameters, which can assist in the selection of an appropriate pump to suit particular conditions. An example is given in Figure 2. Figure 2 Equipment Set Up

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• ### Calculation, pump, hydraulic, npsh, suction, fluid,

P = Power transmitted to the fluid by the pump in Watt. Q = Flow in m3/s. p = density of the liquid in kg/m3. Hm = Hydraulic pressure loss network expressed in m. H = Hydraulic load in meter of water. 9.81 = Average Intensity of gravity. Degraded energy expressed by the output of the pump (Power at the shaft of the pump)

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• ### Calculation of scop for heat pumps according to en

2013-1-21 · For the calculation of SCOP according to EN 14825, the heat pump must be tested at a series of temperatures, corresponding to the temperatures in EN 14511. As an example, the test temperatures on the cold side of the heat pump for air-to-air heat pumps and air-to-water heat pumps for the different climate zones are given in the table below.

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• ### Centrifugal Pump Efficiency Calculation - EIT ...

Centrifugal pump efficiency equation. Centrifugal pump efficiency = Power Output from Pump Power Input to Pump * 100. Centrifugal Pump Efficiency and Discharge Temperature. Actual Power required in pump can also be derived from Heat balance across the pump.Difference in Heat flow Outlet and Heat flow inlet is the actual power required for the ...

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• ### Pump and Fan Efficiency - Engineering ToolBox

2021-5-7 · η = overall efficiency. The losses in a pump or fan converts to heat that is transferred to the fluid and the surroundings. As a rule of thumb - the temperature increase in a fan transporting air is approximately 1 o C. Example - Hydraulic Efficiency for a Pump. An inline water pump works between pressure 1 bar (1 10 5 N/m 2) and 10 bar (10 10 ...

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• ### Volumetric Efficiency of Pump or Fan Calculator

Volumetric Efficiency of Pump or Fan Calculator. Volumetric efficiency (η v) defines the ratio of fluid delivered by a piston pump per stroke to the displacement volume of the piston.It can be increased to above 100 percentage for improved performance. Volume Flow out of Pump and Leakage Volume Flow are the parameters involved in calculating volumetric efficiency.

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• ### Hydraulic Pumps and Motors: Considering Efficiency -

2012-12-24 · For the purposes of this example, though, let’s assume the actual drive torque was 360 Nm. Mechanical/hydraulic efficiency would be 91% (329 360 x 100 = 91%). Overall efficiency is simply the product of volumetric and mechanical/hydraulic efficiency. So continuing with the above example, the overall efficiency of the pump is 0.9 x 0.91 x ...

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• ### Engineering-xls: Pump Energy Efficiency Calculation

2019-1-29 · A common example of such a machine is the heat engine, which uses energy in the form of heat to produce mechanical energy. This family includes many members, but the internal combustion engine is one with which we are all familiar. ... Pump Efficiency Calculation Tool- Introduction 2. Pump Efficiency Calculation Tool- Help 3. Pump Efficiency ...

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• ### Pump flow rate calculation-ZB pump - zoompumps.com

2019-6-19 · 102 is a unit finishing constant. Pump effective power pump shaft power = pump efficiency (generally 50% - 90%, large pump is higher) The energy obtained by the pump per unit weight of liquid is called the lift. The lift of the pump, including the suction stroke, is approximately the difference between the pump outlet and the inlet pressure.

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• ### Pump Power Calculator - Hydraulic Power - Shaft Power

2021-2-22 · 4. Step by step example of calculation of pump power. A pump has to deliver 100 m3/h of water at 2 bar g and 20c, from a tank at atmospheric pressure. The pump is connected to a pipe of same diameter DN100 at the inlet and outlet of the pump. The pump efficiency is 75%. Step 1 : calculate the pump …

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• ### An introduction to energy consumption in pumps

2010-8-1 · respectively, the efficiency (in %/100) of the pump, the transmission (flexible transmission, belt transmission, flexible coupling, etc) and the electric motor. Let’s take an easy calculation as an example. A pump with a capacity of 100 m3/h, a difference in pressure of 1 bar and an efficiency of 75% will require an output at the pump shaft of

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• ### Electrical Submersible Pumping (ESP) Systems

2017-10-17 · separator at the pump intake to achieve maximum system efficiency. Ideally, if the gas remains in solution, the pump behaves normally, however as gas to liquid ratio increases beyond the critical value of between 10-15%, the pump efficiency decreases and lower pump head is produced.

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• ### Simulation of Rotating Operations (Pump, Compressor ...

2016-7-10 · Pump is used to increase pressure of inlet liquid stream (the inlet stream must be liquid). First, we define the inlet stream, and define the outlet stream, define energy stream. Second, we specify Delta P or directly you can specify the pressure of outlet stream and we specify the adiabatic efficiency.and click on, if you don't click on pump ...

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• ### Volumetric Efficiency of Pump or Fan Calculator

Volumetric Efficiency of Pump or Fan Calculator. Volumetric efficiency (η v) defines the ratio of fluid delivered by a piston pump per stroke to the displacement volume of the piston.It can be increased to above 100 percentage for improved performance. Volume Flow out of Pump and Leakage Volume Flow are the parameters involved in calculating volumetric efficiency.

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• ### New Pump Efficiency Standards Part 3: Calculating

2016-6-14 · Calculating (PER VL)Values. Just like PER CL efficiency ratings, PER VL efficiency ratings are based on a full size or maximum impeller for a given pump, and start at BEP. The PER VL also uses a control curve since it is based on variable-speed operation. The control curve uses a control head or head at “0” GPM of 20% of BEP at full speed. Following this control curve, the input horsepower ...

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• ### Hydraulic Pumps and Motors: Considering Efficiency -

2012-12-24 · For the purposes of this example, though, let’s assume the actual drive torque was 360 Nm. Mechanical/hydraulic efficiency would be 91% (329 360 x 100 = 91%). Overall efficiency is simply the product of volumetric and mechanical/hydraulic efficiency. So continuing with the above example, the overall efficiency of the pump is 0.9 x 0.91 x ...

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• ### 7. ENERGY PERFORMANCE ASSESSMENT OF WATER PUMPS

2017-9-8 · The pump shaft power Ps is calculated by multiplying the motor input power by motor effi-ciency at the existing loading. P s = P m x η Motor 7.4.7 Pump efficiency This is arrived at by dividing the hydraulic power by pump shaft power η Pump = P h P s Example of pump efficiency calculation Illustration of calculation method outlined

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• ### Main principles of pumps selection. Calculation of

Pump having efficiency of 0.78 is pumping fluid with density of 1,030 kg/m 3 and 132 m 3 /h flow rate. Head created in pipeline equals to 17.2 m. Head created in pipeline equals to 17.2 m. The pump is actuated by electric motor having power of 9.5 kW and efficiency of 0.95.

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• ### (PDF) Calculation and Design of the Heat Pumps

An example of calculation is performed f or heat pump . ... The potential for high energy efficiency of ground source heat pump systems has resulted in rapidly growing numbers and sizes of such ...

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• ### What is Pump Head Calculation - Pump Performance ...

2019-5-22 · Pump Head Calculation – Pump Performance Calculation . In this example, we will see, how to predict. the design discharge; water horsepower; the pump head; of a centrifugal pump.This performance data will be derived from the Euler’s turbomachine equation:. Shaft torque: T …

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• ### Coefficient of Performance, COP – Basic, Formula,

2021-5-12 · In a chilled water system, the power consumption of pumps can be reduced by selecting high-efficiency pumps. Calculation of Coefficient of Performance. Let us consider, a heat pump is running in your room. Coefficient of performance, COP = 3. the compressor power consumption is 1800 watt. Now, we will calculate,

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• ### Calculation Method: CALCM:01 - ncm-pcdb.org.uk

2017-9-5 · This heat pump annual performance calculation method was derived from EN15316-4- 2:2017 and calculates a Seasonal Performance Factor (SPF) for a heat pump’s space heating duty at a range of PSR values (0.2 to 2.0; for SAP 2016 this is 0.2 to 3.0) and a

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• ### Power Flow and Efficiency - University of Sussex

2008-12-8 · • The efficiency is fairly fixed for a given design of engine. It is generally based on the factors effecting heat loss, such as the design of the combustion chamber and materials used, and the compression ratio. The efficiency does not vary dramatically and tends to range from .34 to .38 .

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