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Introduction

Combustion of coal, a traditional method, may no longer be suited for bring forthing electricity in Hong Kong ‘s hereafter. Serious air pollution that is harmful to Hong Kong people ‘s lives and the diminishing supply of resources that does non run into the heavy demand on energy are two important grounds. These jobs raised from the coal burning imply that an alternate engineering is necessary. Therefore, this essay will look at a new application – Integrated Gasification Combined Cycle ( IGCC ) . The rule behind this application will be described first, and followed by discoursing both efficiency and environmental advantages and how it improves the lives of Hong Kong people.

The essay will stop with reasoning the potency of the application in Hong Kong.

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Principle of Integrated Gasification Combined Cycle

IGCC is a gasification-based engineering bring forthing electricity with the usage of ‘combined rhythm ‘ format, which means two electricity beginnings are generated from two different turbines at the same time. Like coal burning, coal is used in this engineering but it undergoes gasification foremost 1, which is the procedure of transforming the organic substances in coal into combustible gases, like H, C monoxide and etc. 2, alternatively of being burned. Purification of the produced gases is so carried out to take particulates and unwanted acidic compounds, and after this measure, the gases are used as fuel and burned in a burning turbine to do an electric generator tally to bring forth one of the electricity beginnings 1.

The heat given out in this burning turbine is used to boil H2O and generate steam for the operation of steam turbine generator to bring forth the other electricity beginning 1.

Advantages of the application and the impacts on Hong Kong people ‘s lives

Environmental advantage and the impacts

Bettering the air quality and acid rain job by cutting down the emanation of air pollutants from IGCC power workss can likely supply Hong Kong people with a healthy life topographic point and salvage Hong Kong ‘s belongings. Harmonizing to Quick Air Pollution Statistics, conducted by ‘Clean the Air Hong Kong ‘ 3, the power workss account for the immense emanation of pollutants, such as 86 % sulfur oxides and 54 % N oxides. Owing to the gasification-based feature, nevertheless, the deteriorating air pollution can be greatly improved. For case, 99 % of the sulfur is removed 4 by being converted to hydrogen sulfide which so reacts with calcium hydroxide to give out stable Ca sulfide under desulphurization during coal gasification 2. For N oxides, N in coal reacts with H to bring forth ammonium hydroxide in the gasifier and this compound can be easy removed 4. In these ways, the jobs like eroding of tall edifices and harvests devastation raised from acid rain, which destroy Hong Kong belongings, may possibly be tackled since these gases are responsible for the formation of acidic substances when they dissolve in rain. Furthermore, it is found that approximately 60 % people have wellness jobs related to respiratory system 3 so the betterment of air quality can heighten the wellness of Hong Kong people.

Hence, IGCC engineering is so environmental friendly that non merely can the job of acid rain be eased to minimise the economic loss in Hong Kong, but besides the sum of contaminated air given out from the power workss can be lowered to protect Hong Kong people from enduring respiratory diseases.

Efficiency advantage and the impacts

IGCC is besides helpful to bring forth electricity in a more efficient manner, which means more energy is produced by utilizing less resource, so the high demand of energy in Hong Kong may be alleviated. The latest imperativeness release about Hong Kong population in 2008 provinces that there are about 7 million people 5, which means an inordinate sum of energy will be used in a quicker gait to fulfill Hong Kong people ‘s lives. To work out this job, higher efficiency in power coevals achieved by IGCC because of its particular characteristic – ‘combined rhythm ‘ format is required 1. Lapp as IGCC, coal is used as primary resource in coal burning, but it is straight burned foremost, and steam created from warming is so used to drive steam turbine generator to bring forth merely one electricity beginning 6. About 33-40 % of chemical energy stored in coal is converted to electrical energy 1 while the other is wholly lost. On the contrary, about 42 % efficiency, which will be boosted to 60 % in the hereafter, can be attained in IGCC since it makes the usage of combination of a burning turbine and a steam turbine to maximise the production of electrical energy 1. In this manner, without any alteration of the ingestion sum of coal, more electricity can still be produced to catch up with the increasing population, for illustration, more electricity for illuming, cooking or air conditioning is supplied to the immense sum of lodging, more is supplied to make productive working atmosphere, and besides more is supplied for the operation of MTR and ropewaies to transport Hong Kong people.

Using IGCC, a extremely efficient engineering, in power workss might therefore aid to hike the supply of electricity and carry through Hong Kong people ‘s demand in different ways.

Decision

To reason, the application of Integrated Gasification Combined Cycle in power workss has its possible to be developed in Hong Kong, and it may play a transitional function in the transition from coal burning to alternative energy beginnings, like solar power air current power and etc. , in foreseeable hereafter. Thankss to its two particular characteristics – gasification-based and ‘combined rhythms ‘ format, it has benefits to the facets of environment and efficiency. It diminishes the production of inauspicious pollutants, and therefore it helps to heighten the air quality and work out the jobs caused by acid rain, and eventually the populating criterion of Hong Kong people can be upgraded in footings of healthy environment and minimal unneeded loss in economic. It besides contributes to the maximal use of limited resources so more electricity can be supplied to run into the demand on energy of the turning population in assortment of countries. It seems to be certain that many other states can use this new engineering in power coevals to heighten gradual alteration from the non-renewable resource to the renewable 1.

Mention

1.

Fossil Energy Office of Communications. How Coal Gasification Power Plants Work [ on-line ] . 2008. U.

S. Department of Energy. Available: hypertext transfer protocol: //fossil.energy.

gov/programs/powersystems/gasification/howgasificationworks.html Accessed: 2008 Oct 17.2. Tsui H C.

Thermodynamic, kinetic and hydrodynamic analyses of the gasification of coal H2O slurry fuels in a circulating fluidized bed gasifier. Introduction: Background. Pennsylvania State University. 1990. p 144.3. Clean The Air Hong Kong.

Quick Air Pollution Statistics [ online ] . c2007. Available: hypertext transfer protocol: //www.cleantheair.org.hk/quick-stats.php Accessed: 2008 Oct 9. 

  • Christopher H, Maarten van der B.

    Gasification ( Second Edition ) . Economicss, Environmental and Safety Issues: Environmental Issues. Amsterdam ; Boston: Gulf Professional Pub./Elsevier Science.

    2008. p 456.

 5. Hong Kong ‘s Information Service Department. Mid-year Population for 2008 [ on-line ] . 2008. Government of HKSAR. Available: hypertext transfer protocol: //www.

info.gov.hk/gia/general/200808/14/P200808140106.htm Accessed: 2008 Oct 9.6. Fossil Energy Office of Communications. Gasification Technology R ; A ; D [ online ] .

2008. U.S. Department of Energy. Available: hypertext transfer protocol: //fossil.energy.gov/programs/powersystems/gasification/index.html Accessed: 2008 Oct 17.

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