Power Generation-diesel Power

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Lesson Introduction

Review: Lesson 3

The previous Lesson was about Hydro Power station. The student/User is expected to remember the following from the lesson 3.

Basics:
Arrangements:
Location:
Pumped storage scheme:

Definition, advantages & disadvantages.
components that make up a steam power station.
Factors influencing selection of construction site.
Overview & comparison to Hydro-power station.

Preview: Lesson 4

This Lesson is about Diesel Power station. The student/User is expected to understand the following at the end of the lesson.

Basics:
Arrangements:
Advantages & Disadvantages:

Definition
components that make up a Diesel power station.
How this station measures up

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Course Navigation

Lessons in ELECTRICAL POWER GENERATION

Lesson #1:

Power Generation: Introduction

Lesson #2:

Power Generation: Steam Power Station

Lesson #3:

Power Generation: Hydro Power Station

Lesson #4:

Power Generation: Diesel Power Station← You are here

Lesson #5:

Power Generation: Nuclear Power Station

Lesson #6:

Power Generation: Gasturbine Power Station

Lesson #7:

Power Generation: Variable load

Lesson #8:

Power Generation: Comparison

Quiz Test:

Power Generation: Quiz

Course Formula Sheet:

Electric Power Generation - Formulae

Part 1: Diesel Power station → Basics

Figure 1:Trailer from Danish Emergency Management Agency with 40 kVA generator

Introduction: Diesel Power station

A Diesel power station(also known as Stand-by power station) uses a diesel engine as prime mover for the generation of electrical energy.

This power sattion is generally compact and thus can be located where it is actually required. This kind of power station can be used to produce limited amounts of electrical energy. In most countries these power stations are used as emergency supply stations.

Operation

The diesel burns inside the engine and the combustion process causes rotational mechanical energy that turns the engine shaft and drives the alternator. The alternator inturn, converts mechanical energy into electrical energy.

This type of electricity generating power station will probably be used a long time into the future, due to a need for reliable stand-by electrical source for emergency situations.

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Part 3: Advantages v/s Disadvantages

Advantages	Disadvantages
Simple design & layout of plant	High running charges due to costly price of Diesel
Occupies less space & is compact	Plant does not work efficiently under prolonged overload conditions
Can be started quickly and picks up load in a short time	Generates small amount of power
Requires less water for cooling	Cost of lubrication very high
Thermal efficiency better that of Steam Power plant of same size	Maintenance charges are generally high
Overall cost is cheaper than that of Steam Power plant of same size	.
Requires no Operating staff	.
No stand-by losses	.

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Part 5: Example

Power Generation-diesel Power/Part5

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Part 7: Refferences & Exercise 4

Refferences:

This resource is prepared from Lecture notes by Thuvack.
V.K Mehta & Rohit Mehta :- Principles of Power systems (1st ed.). S.CHAND .ISBN 81-219-2496-0

Execise 4:

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Answers to Exercise 4

Part 4: Calculation & Efficiency

If heat produced by _X kg of oil = Y KCal (where 1kWh = 860 KCal)

Then we can derive the overal power plant efficiency as:

 (in %) ... Equation 4.1

Then the engine efficiency becomes:

(in %) ... Equation 4.2

Where:_ $η a l t e r n a t o r$ is specified by manufacturer

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Part 6: Example continued

Power Generation-diesel Power/Part6

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Part 8: Completion list

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