# Population Problems In Hong Kong Environmental Sciences Essay

Hong Kong is a little topographic point, but the population denseness is high. The pollution job in the metropolis is serious and the demand of power from occupant is really high.

We need to work out the job that the supply of the power must be adequate to carry through the occupant ‘s demand. The new developed power system can cut down the pollution in the metropolis. The cost of the power must be low that the occupants can afford.

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Besides, we need to cognize the newest engineering of the power system which is suited to develop in this little metropolis, Hong Kong.

Micro hydro power system is a clean and renewable energy, which does non make the pollution jobs. The running and keeping cost of the micro hydro power system is besides low that the occupants can afford.

We need to cognize about the rule of hydro power system how to work. The equipment and machines use in the system. Transmit ion of the electricity. The topographic point we can put up the hydro power system. Then we can develop the hydro power system in Hong Kong.

There is an article about Hydropower engineering.

1. Type ‘small hydro power ‘ on Google hunt engine, I found the website ‘European Small Hydropower Association ‘ which is a non-profit International Association.

2. On the web site, click Library & A ; gt ; ESHA Publications & A ; gt ; SHP Respects the environment and SHP the engineering.

To put up the hydro power system, there are 2 indispensable equipments, turbine and generator. The turbine is usage for convert the possible energy of H2O flow to mechanical energy. The generator is usage for green goods electricity by change overing the mechanical energy from turbine.

The energy generate from the streamlined H2O is called hydro power. The hydro power is to change over the possible energy into electric energy ( Hydropower engineering, 2010, p.1 ) . The H2O fluxing form high degree to low degree, the possible energy is produce, the force per unit area of H2O flow push the hydro turbine to change over possible energy to the mechanical energy, so the mechanical energy thrust and generator to bring forth electricity.

The most of import thing to bring forth the electricity is to deviate the H2O to travel into the hydro turbine from high degree to low degree. Sometimes the H2O force per unit area is non high plenty to force the hydro turbine, so we need to make an unreal force per unit area ( Hydropower engineering, 2010, p.2 ) to keep the H2O flow steadily.

Besides, when we set up the installation of hydro power system, we need to see the geomorphology of the site, the H2O resource where its generating, site choice and layout, equipment and machines, like hydro turbines and generators and environmental impact appraisal.

## Decision

To construct up a hydro power system, we need to happen a suited topographic point. We need to understand the whole procedure of the system, the map of turbine and generator, and some computation about the H2O flow that can keep the force per unit area of H2O, which is adequate to force the machines like turbine to supply energy for the generator.

2.2 Hydropower a clean and autochthonal renewable energy

## Introduction

Energy is the most of import in our society. The demand of power is increasing quickly. However, the demand of power is impacting our environment. We need to develop a new energy which is clean to cut down these bad effects. Besides, the new energy must be renewable that can supply the power eternity.

There is an article about hydropower a clean and autochthonal renewable energy.

1. Type ‘small hydro power ‘ on Google hunt engine, I found the website ‘European Small Hydropower Association ‘ which is a non-profit International Association.

2 On the web site, click Library & A ; gt ; ESHA Publications & A ; gt ; SHP Respects the environment and SHP the engineering.

2010, Hydropower respects the environment, The European Small Hydropower Association ( ESHA ) , hypertext transfer protocol: //www.esha.be/fileadmin/esha_files/documents/SHERPA/SHERPA_fiche_Environment.pdf

## Background

Greenhouse gas emanations are increasing because the energy demand is turning. Many industry, conveyance, power workss discharge a big sum of nursery gases. Greenhouse gases is increasing in the ambiance ( Hydropower respects the environment, 2010, p.2 ) . We need to cut down to dispatch these nursery gases in our community.

Green house consequence makes clime alteration, more flooding, storming, lifting temperature, ice caps runing, etc. We need to cut down this consequence to hold a better life quality.

The solution of clime alteration and cut down the nursery gases discharge is use the renewable energy ( Hydropower respects the environment, 2010, p.1 ) and hydropower is one of it.

Hydropower is a clean and renewable energy. The supply of H2O is infinite ( Hydropower respects the environment, 2010, p.2 ) . There is no nursery gas discharge when hydropower produces electricity. Hydropower has low impact to the environment ; the quality of H2O does n’t alter besides the production of electricity. There is no pollutants produce in the procedure of hydropower, it cut down the hazard to public wellness.

## Decision

Hydropower is a good renewable and clean energy. It reduces the pollution to the environment. As particular in the topographic point which is in serious pollution, it can better the air quality and H2O quality will non be affected. The people in this community will be healthier. It besides reduces the consequence to the conditions that can protect the people ‘s life and the belongingss of the people.

2.3 Low cost micro hydropower system

## Introduction

Energy is so of import to our society and the demand of power is so big. It makes the cost of the power addition. The cost of utilizing the power is high that non all occupants can afford. We need to develop an economical power for the occupants, and give them one more pick.

There is an article about micro hydropower.

1. Open Internet Explorer ; travel to URL & A ; lt ; hypertext transfer protocol: //online.uts.edu.au/webapps/login/ & A ; gt ; .

2. Login to UTSonline, and so snap Engineering Communication ( HK ) .

3. Click Project Topic on the left column & A ; gt ; Engineering for Community Development & A ; gt ; Practical Action.

4. On Practical Action, click energy & A ; gt ; micro hydro, so I got the proficient brief on micro hydro power.

A. Harvey, 2006, Micro-hydro power, Practical Action, The Schumacher Center for Technology and Development, hypertext transfer protocol: //practicalaction.org/energy/docs/technical_information_service/micro_hydro_power.pdf.

## Background

Low cost is one advantage of utilizing micro hydro power. Many other states were get downing to utilize hydropower in early century and their Numberss grew steadily. ( A. Harvey, Micro-hydro power, 2006, p.1 ) Hydropower can supply for industrial and domestic usage, because the cost of power is non high, many people are welcome to utilize it. Peoples can salvage more money and increase the economic activities.

In developing states, there are many low income groups in the community. Hydropower becomes an of import function for supplying electricity to the people because of low cost. The low income groups can utilize the low cost electricity, they can make their work more efficiency, and it besides increases their productivenesss.

When the hydropower provide to domestic usage, doing it low-cost for low incomes groups and maintain the costs and measures to a lower limit is of import. There are few solutions that can assist them. First, limited the supply to user, when the use is over their mark, the supply will be disconnected. Second, cut down connexion cost, if the use of power is low, it can utilize little size overseas telegram that can cut down the cost. The last 1, when they rely on hydropower, utilizing of other fuels will be decreased, it will take down the cost on utilizing power. ( A. Harvey, Micro-hydro power, 2006, p.6 )

## Decision

To supply a low cost energy is needed in community. It gives one more pick to the people. It helps people to salvage money from low cost power and increase the economic activities in communities. On the other manus, it provides low cost electricity to low income groups to raise their life quality and their work more efficiency, and besides increase their productivenesss.

2.4 Using waste H2O for micro hydro power

## Introduction

In Hong Kong, there is no suited location to construct a big dike for hydro power system. Micro hydropower system is more suited. A new engineering to recycle waste H2O of the metropolis to supply the electricity through the sewerage system is suited in the community. Using waste H2O for micro hydro power provides a stable, economical and renewable energy.

There is an article about utilizing waste H2O for micro hydro power system. Type ‘micro hydro power ‘ on Google hunt engine, I found the website below:

Dr. R. K. Saket and Er. Anand Kumar K. S. , 2006, Hybrid-micro Hydro Power Generation utilizing Municipal Waste and It ‘s Reliability Evaluation, GMSARN International Conference on Sustainable Development, hypertext transfer protocol: //dl.gmseenet.org:8080/bitstream/handle/123456789/1000/019.pdf? sequence=1

## Background

Exploitation of waste H2O flow to supply low cost electricity from the community of the metropolis is a new resource of micro hydro power system. By implemented the sewerage system, ‘using the cast-off H2O from family contraptions like lavatories, sinks and showers, which hits four turbine blades as it falls down the pipes, powering a generator. ‘ ( Maria Popova, hydro power: Turning lavatory waste H2O into electricity, July 2010 ) , can supply a dependable and economical energy to the community.

It solves the job that there is no suited location to construct a dike or giant installations for hydro power system. It is easy to construct up the waste H2O micro hydro system by implemented the sewerage system ; the cost of technology work will be lower. Besides, in the sewerage system, the force per unit area can be maintained, the waste H2O flow will non be affect in summer or winter ( Hybrid-micro Hydro Power Generation utilizing Municipal Waste and It ‘s Reliability Evaluation, 2006, p.1 ) , non same as out-of-door hydro system, affected by the seasons.

This besides cut down the environmental impact to the community with utilizing waste H2O for provide electricity, by H2O intervention techniques, chemical less H2O can be provided and utilize the H2O to function the land of the community. ( Hybrid-micro Hydro Power Generation utilizing Municipal Waste and It ‘s Reliability Evaluation, 2006, p.2 )

## Decision

Using waste H2O for micro hydro power system is suited in the community. It is easy to construct up by implemented the sewerage system to cut down the technology cost and avoid a elephantine technology work in the community. It provides a stable, economical and dependable energy to the occupants. It is besides a clean energy that minimal environmental impact to the community.

## Decisions

To sum up the information, Hong Kong is needed to develop a new energy beginning to carry through the occupants ‘s demand. Micro hydro power system is suited to develop in Hong Kong ‘s community.

We need to cognize the latest engineering of micro hydro power system. We need to cognize about the rule of hydro power system how to work. The equipment and machines use in the system. The topographic point where is suited to put up the hydro power system.

Hydropower is a clean and renewable energy. The environmental impact is little. There is no green house gases discharge in the procedure of green goods electricity. It reduces the pollution to the environment. The H2O supply is eternity, non like fossil fuels.

The demand of power is so big. It makes the cost of the power addition. Micro hydropower provides a low cost energy to the community. It provides the low cost electricity to low income groups.

A new engineering to recycle waste H2O of the metropolis to supply the electricity through the sewerage system is suited in the community. It provides a stable, economical and dependable energy.

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