### How to calculate the volumetric efficiency of an internal

Step 1. Calculate the intake air density using equation (9). Make sure that all measurement units match. The air intake pressure was converted from bar to Pa and the temperature from C to K. Step 2. Calculate the volumetric efficiency of the engine using equation (8).

Get Price### SEER Efficiency Savings Calculator

Take a few minutes to use this Savings Calculator to find out how much money you can save in one year and in 20 years. A typical example would include comparing a 3 ton, 8 SEER air conditioner to a new 3 ton, 16 SEER unit. Assuming the electricity cost to be $0.14 per kilowatt hour and the AC runs 2100 hours per season you would save $661 per year.

Get Price### What is Particle Size Distribution D50, D50 Particle Size

Aug 02, 2021Particle Size Distribution D50 is one of an important parameter characterizing particle size. For example, if D50=5.8 um, then 50% of the particles in the sample are larger than 5.8 um, and 50% smaller than 5.8 um. D50 is usually used to represent the particle size of group of particles. particle-size-distribution-d50.

Get Price### How to Select and Size Hydraulic

Jul 23, 2014According to the cooling capacity curves, the minimum size cooler for these conditions is an OAW 61-40. Oil-pressure drop, P, can be found from the pressure-drop curve. Multiply it by the

Get Price### Generator Size Calculator

Generator Size Calculator. During an emergency is not the time to discover your home's wattage needs. We created this generator size calculator to help you consider your needs and to help you think about what you would like to power during an outage at your home. Start by simply inputting your home's postal code, square footage and choose your

Get Price### 5 ways to measure manufacturing equipment efficiency

Aug 20, 2018Categorising incidents into these six subsets can help operators better understand the factors that are affecting plant efficiency. 5. Overall equipment effectiveness. Once you have determined a machine's availability, performance and quality scores, you can calculate the overall equipment effectiveness (OEE).

Get Price### Millwork in the US

How to Calculate: Total Revenue / Closing Inventory. How to Interpret: This is an efficiency ratio, which indicates the average liquidity of the inventory or whether a business has over or under stocked inventory. This ratio is also known as inventory turnover and is often

Get Price### Coilwinding Calculators

Wire Size Conversion Calculator (AWG) Wire Size Conversion Calculator (SWG) Calculate Optimum Wire Tension Calculate Correction factor for Coil Resistance (25 degree Nominal) Calculate Correction factor for Coil Resistance (20 degree Nominal) Calculate Efficiency, Hourly rates, Monthly rates and Yearly rates Toroid Winding Calculator

Get Price### Hydroelectric Information

Oct 30, 2019The combined efficiency of the turbine and generator ranges from 40% to 80%, with higher efficiency at higher heads and for larger generators. To get a rough idea, use 0.50 (representing 50%) as a multiplier for efficiency. Here are example computations using the minimum parameters mentioned above. 10 ft x 100 gpm x 0.18 x 0.50 eff = 90 watts

Get Price### Understanding Efficiency

Dec 20, 2010When asked how to calculate efficiency, the BYO Wizard replied with the same definition as was given in Narziss [BYO]. The efficiency that matters for comparison with others should be the efficiency into boiler or the brewhouse efficiency if the batch size matches the temperature corrected post boil volume. If it is crushed with a mill

Get Price### How to Calculate Sample Size for Different Study Designs

Sep 02, 2012So if the researcher wants to calculate sample size for the above-mentioned case control study to know link between childhood sexual abuse with psychiatric disorder in adulthood and he wants to fix power of study at 80% and assuming expected proportions in case group and control group are 0.35 and 0.20 respectively, and he wants to have equal

Get Price### Wallace Racing

Drag Racing Calculators,Calculators to find 1/4 mile ET and MPH, CID,Piston Speed,gear ratio,carburetor size,margin of victory,Engine calculator, Calculates relative horsepower, air density, density altitude, virtual temperature, actual air pressure,

Get Price### Measuring Paper Machine Energy Performance

Average pumping efficiency is below 40%. Over 10% of pumps run below 10% efficiency. Major factors affecting pump efficiency are throttled valves and pump over-sizing. Seal leakage causes highest downtime and cost. Check for multiple parallel pumps when number of operating pumps is

Get Price### How to Perform a Time Study

you are calculating the observed time for. The numbers in the "OT" column are the observed times for the pen assembly. As you can see, this was calculated by subtracting preceding "W" values. Step 2: Multiply the observed time (OT) for each step by the rating (as a percentage; refer to the equation below). Record this number in

Get Price### Calculate Size of Pole Foundation Wind Pressure on Pole

Apr 14, 2019Example: Calculate Pole foundation size and Wind pressure on Pole for following Details. Tubular Street Light Pole (430V) height is 11 Meter which is in made with three different size of Tubular Pipe. First Part is 2.7 meter height with 140mm diameter, Second part of Pole is 2.7 meter height with 146 mm diameter and

Get Price### 5 Ways to Improve your All Grain Beer Efficiency

Jul 04, 2008Achieving higher efficiency on a consistent basis lets you use less grains to achieve a target original gravity. All grain brewers, particularly those who are inexperienced, often have low efficiency numbers. Lets look at five ways to increase your efficiency number: 1.

Get Price### How to calculate battery run

Apr 23, 2021Account for the efficiency of the inverter, say 85% Watt-hours = watts * hours / efficiency = 1250 / 0.85 = 1470 watt-hours Since watts = amps * volts divide the watt hours by the voltage of the battery to get amp-hours of battery storage Amp-hours (at 12 volts) = watt-hours / 12 volts = 1470 / 12 = 122.5 amp-hours.

Get Price### Steam Calculators: Boiler Calculator

Mar 17, 2015Using the Steam Property Calculator, properties are determined using Deaerator Pressure and Quality = 0 (Saturated Liquid). The Specific Enthalpy is then multiplied by the Mass Flow to get the Energy Flow: Combustion Efficiency is the % of fuel energy that is directly added to the feedwater and not otherwise lost or used.

Get Price### How to Properly Size a Window Air Conditioner

May 30, 2021Look for a unit with an Energy Star label and an energy-efficiency ratio (EER) of 10 or above. The higher the EER, the lower your operating costs. All

Get Price### Voltage drop calculation methods with examples explained

Aug 31, 2021Read conductor size for that value. Where this results in an oversized cable, verify cable lug sizes for molded case circuit breakers and fusible 4 switches. Where lug size available is exceeded, go to next higher rating. Go back to top ↑ Example #2. A three-phase, four-wire lighting feeder on a 208 V circuit is 250 ft (76.2 m) long.

Get Price### How to Calculate Production Capacity

Nov 21, 2018The first step in understanding production capacity is to calculate the machine-hour capacity of the factory or manufacturing plant. For example, say that a plant has 50 machines and workers can use the machines from 6 a.m. until 10 p.m., or for 16 hours a day.

Get Price### Wind Power Calculator: Energy vs Turbine Size vs Speed

This number is multiplied by the efficiency of your system (which is typically 20-25% for residential size designs) and by turbine swept area in sq.m. Note that for horizontal turbines the rotor sweep area is A=π(D/2) 2, where D is the diameter of the blades, π=3.14 (see calculation of the energy in the wind).

Get Price### Calculation of Cable Tray Size

Dec 07, 2014Calculate Size of Cable Tray for Following Cable Schedule. Cable Tray should be perforated and 20% spare Capacity. Distance between each Cable is 10mm. Cable are laying in Single Layer in Cable Tray. (1) 2 No's of 3.5Cx300 Sq.mm XLPE Cable having 59.7mm Outer Diameter and 5.9 Kg/Meter weight (2) 2 No's of 3.5Cx400 Sq.mm

Get Price### Wind Turbine Power Calculator

Over 100 wind turbine power and efficiency curves covering a range of designs and sizes. At 0C and 100KPa the air density is 1.2754 kg/m 3 but this will vary with altitude and temperature The tip speed ratio is included in the calculation so the rotor and alternator speed can be calculated.

Get Price### Calculate OEE

Planned Production Time. As described in the OEE Factors page, the OEE calculation begins with Planned Production Time.So first, exclude any Shift Time where there is no intention of running production (typically Breaks).. Formula: Shift Length − Breaks Example: 480 minutes − 60 minutes = 420 minutes Run Time. The next step is to calculate the amount of time that production was actually

Get Price### Power Calculator: kVA to kW, kW to kVA, Diesel Fuel

The Fuel Consumption Calculator above approximates the fuel consumption of a diesel generator based on its size and operating load. Please note that these results are intended to be used to estimate how much fuel a generator uses during operation and are not exact metrics due to various factors that can affect the amount of fuel consumed.

Get Price### Chromatography

Chromatography - Chromatography - Efficiency and resolution: There are two features of the concentration profile important in determining the efficiency of a column and its subsequent ability to separate or resolve solute zones. Peak maximum, the first, refers to the location of the maximum concentration of a peak. To achieve satisfactory resolution, the maxima of two adjacent peaks must be

Get Price### Home Energy Audits

A home energy audit, also known as a home energy assessment, can help you understand the whole picture of your home's energy use. An audit can help you determine how much energy your home uses, where your home is losing energy, and which problem areas and fixes you should prioritize to make your home more efficient and comfortable.

Get Price### How to Read a Motor Nameplate

Mar 20, 2014When it comes to sizing a VFD the FLA rating is a very important piece of information. Learn more about sizing VFDs at our VFD Buying Guide. Phase. Unless you have a unique application your motor will be rated for single-phase or three-phase input power. RPM (Speed) The RPM listed on the nameplate is the shaft speed for the motor.

Get Price### What Size Furnace Do You Need? 3 Easy Steps for Sizing

Nov 30, 2018But before we buy an 80,000 BTU furnace, there's furnace efficiency to consider as well. For instance, a furnace with 80,000 BTU input and an 80% efficiency rating will only produce 64,000 BTUs. We need something stronger. A 100,000 BTU furnace with an 80% efficiency rating or higher will produce the 80,000 BTUs necessary and then some.

Get Price### Calculate Turbine Efficiency

1. Reheating cycle of steam turbine. In this system,the steam's ability to work may be slightly increased by reheating the steam during its passing through the turbine.Steam first enters into the turbine at superheated state.Now steam's pressure and temperature is improved by efficiency of Rankine cycle.This will increase its expansion ratio and steam has become wet condition at the end of

Get Price### The size of a pilot study for a clinical trial should be

Objective: To investigate methods to determine the size of a pilot study to inform a power calculation for a randomized controlled trial (RCT) using an interval/ratio outcome measure. Study design: Calculations based on confidence intervals (CIs) for the sample standard deviation (SD). Results: Based on CIs for the sample SD, methods are demonstrated whereby (1) the observed SD can be adjusted

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