This document provides an overview of boiler performance measurement parameters including equivalent evaporation. It defines equivalent evaporation as the amount of water evaporated per unit time using standard inlet/outlet conditions. A mathematical expression is derived and explained for equivalent evaporation. The document also introduces and explains the factor of evaporation parameter.
A steam turbine is a prime mover in which the potential energy of the steam is transformed into kinetic energy and later in its turn is transformed into the mechanical energy of rotation of the turbine shaft
A steam turbine is a prime mover in which the potential energy of the steam is transformed into kinetic energy and later in its turn is transformed into the mechanical energy of rotation of the turbine shaft
Definition of Supercharging ,
Effect of Supercharging ,
Need of Supercharging ,
Types of Supercharging
1) Centrifugal Supercharger
2) Rootes Supercharger
3) Vane Supercharger ,
Advantages & Disadvantages of Supercharging
Try to explain about the steam generator (boiler), it has three parts. Part 1 cover the types, part 2 about its parts & auxiliaries & accessories and part 3 about performance.
INTRODUCTION
THERMODYNAMIC CYCLE OF STEAM FLOW
RANKINE CYCLE (IDEAL , ACTUAL ,REHEAT)
LAYOUT OF STEAM POWER PLANT
MAJOR COMPONENTS AND THEIR FUNCTIONS
ALTERNATOR
EXCITATION SYSTEM
GOVERNING SYSTEM
STEAM JET COOLING SYSTEM
Steam jet cooling system is a cooling technique which involves usage of steam and water for cooling purposes. In steam jet refrigeration systems, water can be used as the refrigerant. Like air, it is perfectly safe. These systems were applied successfully to refrigeration.
•Temperatures attained using water as a refrigerant are in the range which may satisfy air conditioning, cooling, or chilling requirements.
•Mostly low-grade energy and relatively small amounts of shaft work.
•This system are the utilization of mostly low-grade energy and relatively small amounts of shaft work.
•Not used when temperatures below 5°C are required.
Definition of Supercharging ,
Effect of Supercharging ,
Need of Supercharging ,
Types of Supercharging
1) Centrifugal Supercharger
2) Rootes Supercharger
3) Vane Supercharger ,
Advantages & Disadvantages of Supercharging
Try to explain about the steam generator (boiler), it has three parts. Part 1 cover the types, part 2 about its parts & auxiliaries & accessories and part 3 about performance.
INTRODUCTION
THERMODYNAMIC CYCLE OF STEAM FLOW
RANKINE CYCLE (IDEAL , ACTUAL ,REHEAT)
LAYOUT OF STEAM POWER PLANT
MAJOR COMPONENTS AND THEIR FUNCTIONS
ALTERNATOR
EXCITATION SYSTEM
GOVERNING SYSTEM
STEAM JET COOLING SYSTEM
Steam jet cooling system is a cooling technique which involves usage of steam and water for cooling purposes. In steam jet refrigeration systems, water can be used as the refrigerant. Like air, it is perfectly safe. These systems were applied successfully to refrigeration.
•Temperatures attained using water as a refrigerant are in the range which may satisfy air conditioning, cooling, or chilling requirements.
•Mostly low-grade energy and relatively small amounts of shaft work.
•This system are the utilization of mostly low-grade energy and relatively small amounts of shaft work.
•Not used when temperatures below 5°C are required.
Investigating The Performance of A Steam Power PlantIJMERJOURNAL
ABSTRACT: The performance analysis of Shobra El-Khima power plant in Cairo, Egypt is presented based on energy and exergy analysis to determine the causes , the sites with high exergy destruction , losses and the possibilities of improving the plant performance. The performance of the plant was evaluated at different loads (Full, 75% and, 50 %). The calculated thermal efficiency based on the heat added to the steam was found to be 41.9 %, 41.7 %, 43.9% , while the exergetic efficiency of the power cycle was found to be 44.8%, 45.5% and 48.8% at max, 75% and, 50 % load respectively. The condenser was found to have the largest energy losses where (54.3%, 55.1% and 56.3% at max, 75% and, 50 % load respectively) of the added energy to the steam is lost to the environment. The maximum exergy destruction was found to be in the turbine where the percentage of the exergy destruction was found to be (42%, 59% and 46.1% at max, 75% and, 50 % load respectively). The pump was found to have the minimum exergy destruction. It was also found that the exergy destruction in feed water heaters and in the condenser together represents the maximum exergy destruction in the plant (about 52%). This means that the irreversibilities in the heat transfer devices in the plant have a significant role on the exergy destruction. So, it is thought that the improvement in the power plant will be limited due to the heat transfer devices.
Similar to Boiler performance (Part 1) - Equivalent evaporation - Notes (20)
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About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
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1. Boiler performance (Part 1) -
Equivalent evaporation
Presentation by:
Avdhesh Tyagi
Asst. Prof.
Department of Mechanical Engineering
G. L. Bajaj Institute of Technology & Management, Greater Noida
Disclaimer: The materials provided in this presentation and any comments or information
provided by the presenter are for educational purposes only. Nothing conveyed or provided
should be considered legal, accounting or tax advice.
2. Name of Subject: Applied Thermodynamics
Subject Code: KME401
Department of Mechanical Engineering
G. L. Bajaj Institute of Technology and Management,
Greater Noida, Uttar Pradesh
College code: 192
Affiliated to Dr. A.P.J. Abdul Kalam Technical University (Formerly UPTU Lucknow).
Unit 3
Topic covered: Equivalent evaporation
3. Boiler performance
The performance of any machine reduces with
time and boilers are no exception. The reasons
are poor combustion, fouling and poor
operation and maintenance. Deterioration of
fuel quality and water quality also leads to
poor performance of boiler. It is important to
understand that how we can measure the
performance a boiler and compare it with
performance of other boilers.
4. Boiler performance
Some of the boiler performance measuring
parameters are:
1. Evaporative capacity
2. Evaporation ratio
These 2 parameters measure the performance of
a particular boiler.
3. Equivalent evaporation
4. Boiler efficiency
These 2 parameters measure and compare the
performance of different boilers.
5. Evaporative capacity
The “Evaporative capacity” of a boiler is given
as its capacity to generate steam in unit time
(generally 1 hour).
It is generally be expressed in terms of:
i. kg of steam/hour
ii. kg of steam/hour/m2 of heating surface
6. Evaporation ratio
The “Evaporation ratio” of a boiler is the ratio of
amount of steam generated to the amount of
fuel burnt by boiler in unit time (generally 1
hour).
Mathematically,
Evaporation ratio =
Amount of steam generated
Amount of fuel burnt
It is expressed in terms of kg of steam/kg of fuel.
7. Comparison of performances
of different boilers
Both “Evaporative capacity” and “Evaporation
ratio” good assessment tool for evaluation of
performance of a particular boiler. But here is
a question.
Can we use “Evaporative capacity” and
“Evaporation ratio” for the comparison of
performance of different boilers?
NO.
Why?
8. Performance of Boilers
Different boilers generate steam at different
pressures and temperatures by using feed water
at different temperatures. It means that input
conditions are not comparable and output
results are also quite for different boilers.
For justified comparison of performance of
different boilers, the input and output conditions
must be as per some standard conditions. Also,
the assessment tool must incorporate these
standard conditions.
9. Performance of Boilers
“Evaporative capacity” and “Evaporation ratio” have
no exact means for comparison of performance of
different boilers because it does not deal with
standard conditions for a justified comparison.
In such conditions the selection of “Evaporative
capacity” and “Evaporation ratio” for the
assessment of performance of different boilers will
not be a rational decision.
Hence we need a assessment tool that incorporates
some standard conditions for justified comparison
of performance of different boilers.
10. Performance of Boilers
The adopted standard conditions are as following:
1. Inlet conditions of feed water (1 kg):
Saturated water at 100℃ and 1 atm. pr.
2. Outlet conditions of produced steam (1 kg):
Dry and saturated steam at 100℃ and 1 atm. pr.
“Equivalent evaporation” is an assessment tool
that deals with abovementioned standard
conditions. Now we should discuss in detail about
“Equivalent evaporation”.
11. Equivalent evaporation
It is defined as the amount of water evaporated
(or steam generated) per unit time during
conversion of feed water at 100℃ into dry and
saturated steam at 100℃.
It is frequently expressed as the “amount of
water evaporated from and at 100℃.”
Now we will try to derive a mathematical
expression for equivalent evaporation.
12. Equivalent evaporation
Let
m = Actual mass of water evaporated or steam
generated/hour,
mf = Actual mass of fuel burnt/hour,
ma = Actual mass of water evaporated or steam
generated/kg of fuel (m/mf)
h = Sp. Enthalpy of steam generated
hw = Sp. Enthalpy of feed water
13. Equivalent evaporation
Actual heat gained by ma kg of feed water (or
steam generated)/kg of fuel = ma(h-hw) kJ
Heat required by 1 kg of feed water at 100℃ and
1 atm. pr. for its conversion into dry and
saturated steam at 100℃ and 1 atm. pr. = 2257 kJ
Using above two heat amounts as per definition
of equivalent evaporation (me), we get its
mathematical expression
14. Equivalent evaporation
Equivalent evaporation 𝑚 𝑒 =
𝑚 𝑎 ℎ − ℎ 𝑤
2257
Putting the value of ma we get
Equivalent evaporation 𝑚 𝑒 =
𝑚 ℎ − ℎ 𝑤
𝑚 𝑓 x 2257
Above expression is expressed in terms of kg of
steam/kg of fuel. It may also be expressed in
terms of kg of steam/m2 of heating surface by
suitable conversion.
15. Factor of evaporation
Actual heat gained by 1 kg of feed water (or
steam generated) per unit time = (h-hw) kJ
Heat required by 1 kg of feed water at 100℃ and
1 atm. pr. for its conversion into dry and
saturated steam at 100℃ and 1 atm. pr. = 2257 kJ
Now the comparison of above two heat amounts
gives us factor of evaporation (Fe).
Factor of evaporation 𝐹𝑒 =
ℎ − ℎ 𝑤
2257
16.
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