King Fahd University of Petroleum and Minerals
Mechanical Engineering Department
ME 204 – Term Project
The Effect of feedwater Heater on the
Non-deal Cycle of a Steam
Power Plant Utilizing
Student Details:
Student Name
Identification
Number
Section Number
Salem Al-marri
201570690
3
Instructor
Prof. Mohamed Habib
November 20, 2018
Abstract:
This report discusses the impact of a location of the open feedwater heater on the
thermal potency of the non-deal cycle of a steam powerhouse utilizing the Rankine
cycle. Also, the consequents of add feedwater heater on the environment and the
advantages and disadvantages. Besides, how much cost for add feedwater heater and
how many years will get back the cost.
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Table of Contents
Introduction……………………………………………3
Procedure………………………………………………4
Results………………………………………………….5
Conclusion……………………………………………..8
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Introduction:
A feed hot-water heater could be a device want to step by step
heat water that's being delivered to a vessel. The most reason
why feedwater heaters are used is as a result of the water must
be heated step by step till it reaches its boiling purpose,
additionally called the saturation temperature. If water is heated
too quick or too violently, the boiler metal is broken thanks to
thermal shock, that happens once the fast increase in
temperature creates cracks within the metal. A feed hot-water
heater can also increase the potency of the steam cycle, as a
result of the first heat supply doesn't have to use. Instead, feed
water sometimes is heated by various heat sources naturally
found among the steam cycle. Additionally, there are two styles
of the feed hot-water heater open and closed. In this problem
add on its feedwater heater to improve the cycle and know how
effects on the environment and economic.
Graphs and Schematics for with and without feedwater heater:
Without feedwater heater :
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With feedwater heater:
Procedure:
I.
II.
III.
Add the codes on the EES program.
Make sure the value of P2 is commented
Make parameter tables for efficiency and pressure only
and second table for efficiency, pressure and dellh presents
IV.
From previous tables get two graphs. Efficiency vs
Pressure and Efficiency vs dellh.
V.
From graphs determined, extract the maximum efficiency.
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Results:
First all values:
Second, efficiency vs pressure graph:
Third, efficiency vs delh graph:
Maximum efficiency is 0.4312
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Now get how many years will recover the cost of installing one
heater.
The cost of feedwater heater: 𝜂 s 𝜂 reg
→ (0.8 × 106
$
)(600𝑀𝑊 )(0.05) = 24 × 106 $
𝑀𝑊
Now get the saving per year:
𝑊
𝑊
(𝑄𝑠𝑖𝑚𝑝𝑙𝑒 − 𝑄𝑟𝑒𝑔 ) → ( −
) 𝑀𝑊 × 3600 × 24 × 365
𝜂𝑠
𝜂𝑟𝑒𝑔
→(
600
600
−
) × 0.02 × 3600 × 24 × 365
0.4019 0.4312
= 64 × 106
$
𝑦𝑒𝑎𝑟
Finally find how many years:
Payback period =
𝑇ℎ𝑒 𝑐𝑜𝑠𝑡
𝑠𝑎𝑣𝑖𝑛𝑔 𝑝𝑒𝑟 𝑦𝑒𝑎𝑟
=
24×106
64×106
= 0.375 × 12 =
4.5 𝑚𝑜𝑛𝑡ℎ𝑠 for feedwater heater which is good
Economic:
The cost of one feedwater heater is 24x10^6 $ and payback for
this is about 4.5 months which is perfect to use. The thermal
efficiency when we add feedwater heater is larger than when the
case of no feed water heater.
Effect on Environment:
The is no effect on environment because it not releases any
pollution gases.
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Advantage & Disadvantage:
 Advantages:
1- Higher efficiency will be provided
2- Saving environment of pollution since we will use the heat
exerted from cycle in feedwater heater to use it in boiler.
3- The large volume flow rate of the steam at the final stages
of the turbine will be controlled.
4- Saving money and increasing efficacy of cycle.
 Disadvantages:
1. For each heater, we need a pump
2. Large area will be taken to put the extra components.
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Conclusion:
The efficiency that will improve the cycle and saving money
determined. The energy that produces increased by money and it
will pay back after four and a half months. By this way, the
industry improving and increasing the money as scientists. In
addition, the Rankine cycle is a very useful cycle which has to
lead to a lot of development in our world.
It can generate a lot of power utilizing the huge amount of water
worldwide. But it has some limitation since there must be some
cooling water which makes impossible to have a power plant
working with this cycle very far from a river or water resource.
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