Diesel generator efficiency calculation pdf

The table below outlines an approximation of the diesel generator fuel consumption per hour in litres. Please note this table should only be used as an indication only.

Actual usage may vary slightly due to various factors. Store Locator. Cart is empty. View cart. Generators Portable. Inverter Generators. Petrol Generators. Diesel Air Cooled. Generators Industrial. Generators 5kVA - 20kVA. Generators 56kVA - kVA.

diesel generator efficiency calculation pdf

Generators kVA - kVA. Synchronised kVAkVA. Fuel Tanks. Poly Fuel Tanks. Bunded Fuel Tanks. Air Compressors. Piston Air Compressors. Screw Compressors. Air Dryers.This spreadsheet intend to calculate size of needed diesel generator according to the following input parameters:. You are about to enter following information for each consumer you have in your consumption calculation:. Calculated results consist of:. Hi guys. Sombody can help me if this is posible? Are they linear or non? I only know the ton value of each.

And, What is the correct connection for single phase ACs and lights? Is it Y-D? I also have a three phase 60 HP submersible pump that sucks Amps on each phase to start and then goes to 90 Amps to run. Your sheet says that the full load Amps is 38 while I see on the DG display 90 Amps on each of the three phases. The limits of such loads govern sizing if exceeded. Any international standards talks about this in sizing the Genset? How it will be applied in the calculation?

Consider a case where EDG is to be started on to a distribution transformer. How to size the DG set then? It is depend for Standby application or Prime or base load. It is better to check and alternator efficiency is about 93 to I guess that eash manufacturer has its own manual or guide you should follow.

Wonder that the starting power factor of the motor assumed to be as 0. Normally the value may be 0.When it comes to generators, size matters. In this blog post we talk you through some generator sizing basics. First things first, what equipment will the generator be running? Make a list of everything you need to power and add up the total wattage. The total wattage will tell you the amount of electrical power required by your equipment and from there you can work out the minimum electrical input needed from a generator.

Some electrical equipment has a different starting and running wattage. This is because it takes more energy to start equipment with an electric motor than it does to keep the motor running. Kilowatts is the actual power that will be used by the load to produce a useful working output. Generators are rated in kilo-volt-amperes kVA. You can convert between kVA and kW if you know the efficiency of the electrical system.

Electrical efficiency is expressed as a power factor between 0 and 1: the closer the power factor is to 1, the more efficiently the kVA is being converted into useful kW. International standards rate generators as having a power factor of 0. Power factor is very important for matching the size of your load to a generator: a generator that is rated at kVA and has a 0.

So, if the equipment you want to power has a total wattage of kW, the minimum size generator that could produce that would be a kVA. However load size is only one contributing factor. A generator should not be operated at maximum capacity for more than 30 minutes. The next step is to confirm that your power requirements are feasible given the conditions and location of your site. Site access and manoeuvrability have a big impact on how the generator is delivered and offloaded and this can also affect generator sizing.

If access to the site is particularly narrow, uphill or off road then larger, less manoeuvrable vehicles may not be able to get on and off site. Similarly, if onsite space is limited there may not be enough room to extend the stabiliser legs necessary for offloading the generator, let alone enough space to operate the crane and position the generator. We would always recommend that you talk to a certified electrician before hiring or buying a generator.

Home Blog. Calculate the load size First things first, what equipment will the generator be running?Is it true? Is the efficiency of diesel generator found my multiplying efficiency of diesel engine and efficiency of alternator?

Simply convert the power consumed and the power produced into the same engineering units EU then divide the total power produced by the total power consumed by the generator. Fuel consumption of a diesel generator is a direct way to measure efficiency and it is the largest cost factor in diesel driven generation. Example: BTU content of fuel consumed by generator verses actual power delivered to the generator output terminals converted to BTU's.

TC is the ambient temperature actually, the exhaust temperature whereas TH is the temperature inside the engine. In simple speak, a lot of the heat energy is not converted to mechanical energy. You know this already because the engine gets hot. This energy is not providing motion to the wheels so the efficiency of the IC engine is usually low.

I remember doing experiments on IC engines as an undergrad but don't remember the details. The numbers you put up I don't think are far from the truth though. There's combustion efficiency itself multiply it to cycle efficiency and transmission efficiency.

The most efficient cycle carnot cycle operating at 0 C engine temperature and ambient say 18 0 C using eff. As far as I could remember, typical eff. The only efficiency that really matters is meeting the end user's power requirements with the necessary reliability and have the least life cycle cost. Fuel Combustion Efficiency. Thermo Dynamic Efficiency. This is explaind by Carnot's Cycle Efficiency.

diesel generator efficiency calculation pdf

Refer Thermo Dynamics book. Mechanical Efficiency for the set. This covers for the frictional power loss, windage loss etc. Alternator Efficiency. This relates to electrical aspect, power loss through winding heating, magnetic loss etc. A good reply - because of when I was working on-site as commissioning engineer for system which required in case of emergency around KVA electric power.The performance of the diesel engine means the power and efficiency.

The two usual conditions under which Internal combustion engines are operated are:. The first situation is found in alternating current generator drives and the second one in automobilesrailway engines and tractors etc. A series of tests are carried out on the engine to determine its performance characteristics, such as: Indicated horse power I. PBrake horse power B. PFrictional horse power F. Below, how these quantities are measured discussed briefly.

Diesel engine. Image source: motormotionauto. The indicated horse power I. Brake horse power is defined as the net power available at the crankshaft. The difference between the Indicated horse power I. P and Brake horse power B. P is called frictional horse power F.

Frictional Horse power F.

diesel generator efficiency calculation pdf

P — Brake Horse Power B. P to indicated horse power I. Published hundreds of articles on various engineering topics. Visit our about section to know more.

Energy Efficiency

This site uses Akismet to reduce spam. Learn how your comment data is processed. Related Posts on Engine tag s. Advantages of Steam Turbine over Steam Engine. Why Apply Lubrication to Engine Parts? Comparison between a Petrol and Diesel Engines.

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Related Posts on Automotive topic s. Rocket Propellant: Solid and Liquid. Dynamometer: Introduction and Types. All Comments. I need references. Leave a Reply Cancel reply.Our focus here is onlyon power factor and its effect on output KW. Most of DG manufacturers mention0. So the power factor has to be kept between 0. Consider the alternator capability curve below for referring to safe operational limits on DG.

The green part is the region ideal for the DG to operate; it is the window of 0. The yellow region represents the working conditions where DG will run on low efficiency but with no damaging effects. And the red area represents the load operation which will have damaging effects on the DG.

Even within the power factor window of 0. All diesel generators have a rated KVA and a nameplate power factor. For a diesel generator of KVA and 0. Also, the reactive power that can be supplied by it is KVAr.

Now, to compare the efficiency at 0. With constant single phase voltage of volts at the terminal, the current flowing in the two DGs will be. As copper losses inside the alternator part of the DG are directly proportional to the square of the current flowing, the efficiency reduces at lower power factor.

As the losses of the alternator increases by decreasing the power factor, the engine part of the DG will have to produce more active power and so it will consume more diesel. Also for power factor of 0. AVR is responsible for maintaining the output voltage of the DG, for lower power factors, by producing higher excitation current to keep the voltage within acceptable limits.

To compensate for extra current losses, generator will have to produce more KW at 0. But as it goes to leading pf region, current has to be induced in the magnetic coil for compensation. However this induced current has a limit and thus DG cannot supply a load of power factor more than 0. As diesel generators do not handle the leading power factor loads very well, it is to be made sure that the load applied to them does not cross 1.

Considering the effects of current losses and risk involved with going into leading power factor region, it is advised to maintain the power factor from 0. The true power factor of an electrical distribution system is a multiple of two contributing factors, displacement power factor and distortion power factor. Displacement power factor is angular displacement between current and voltage waveforms; caused by inductive or capacitive loads.

Distortion power factor arises due to harmonics present in the system and this cannot be compensated by adding shunt capacitors. In an office space most of the loads consists of computers or laptops which are single phase non-linear loads. In such conditions, level of distortion in current is very high. Typical values of displacement and distortion power factor for a computer are 0.

Power Generation Calculators

Which will make it trip, giving the impression of over load operation.How to calculate the diesel generator efficiency? The diesel generating set efficiency is calculated interms of units generated per liter of diesel consumed. To monitor either you need to have a diesel flow meter fitted in the supply as well as the return line after the governer and the KWHr Units generated.

For less accurate measurement a dip readings can be take along with the units generated predetermined time.

KiloWatt is the actual power of the generator. On basis of KW the ampere rating load capacity is calculated. The Efficiency can be calculated on the basis of load ampere it can withstand.

Step 1 Determine the amount of fuel consumed in an hour by the generator. You can use a diesel fuel consumption chart to calculate how much fuel is used in an hour by generators of various sizes.

Step 2 Determine the total electrical power load consumed during an hour. This can be done by connecting a kilowatt-hour meter to the output of the generator, or by referencing the electrical output label on the generator. Step 5 Divide the output of the generator in kWh by the input value of the fuel used in kWh. Multiply this figure by to express it as a percent. If you run your KVA gen set for 20 hrs.

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Energy Efficiency in Diesel Generator (DG) Sets

Answers were Sorted based on User's Feedback How to calculate the diesel generator efficiency? Is This Answer Correct? More Electrical Engineering Interview Questions. If a ACB breaker is tripping and closing problem, then what will we check internal.?