The lecture started with two important points. First what are the renewable energy resources and what is the Enviro Mission in the 21 century. Renewable energy is energy produced from natural resources like sunlight, wind, rain, soil. “In 2006 around 18% of global final energy consumption came from renewable energy resources plus 13% from traditional biomass (wood-burning). The next largest renewable source is hydroelectricity which presents 3% of global energy consumption and 15% of global electricity generation. The Enviro Mission Global Solar is a tower developer who is established network of global partners and doing projects underway in the southwest. One of their big projects is a solar updraft tower power generating station recognized as “Solar Tower Buronga” in Buronga, New South Wales which started in 2001.” The height of the tower will be approximately twice as the world’s tallest structure.
The renewable energy resources have different benefits included 100% green resources with zero water, zero emission, zero fossil fuel, more reliable cost, more flexibility on hours to operate and site flexibility. Some of the technologies in renewable energy are nuclear, wind, photovoltaic and solar power. But need to consider that on top of the advantage they have disadvantage. Although nuclear power has a very high capital costs it has long development lifecycle and politically sensitive. Wind power doesn’t have a storage capability and really unreliable but the caption cost is moderate on that. Photovoltaic also has an extremely high caption cost with very expensive to install, expensive to storage and it just can operate 4 to 6 hours per day. Finally solar power is not economical in storage with high caption cost and can just operate 6 to 8 hours per day.
The attractive part in the lecture was solar tower section. Solar tower is a projected type of renewable-energy power plant. In fact it is a combination of three old and established technologies like chimney outcome, greenhouse outcome, and wind turbines. The producing skill of the solar tower mainly depends on two different factors. First the size of the tower such as collector size and chimney height and second the volume of air which needs to get warmed to run up to the chimney.
The solar tower has a big advantage over wind powers and other solar producer. The solar tower is based on no wind program and can work 24 hours and 7 days a week. They are also low costs with sustainable energy (zero water and fossil fuel use), it has more than 75 life expectation, integrates with variety of heat forms storage (hot air can be stored inside the collector region to be used to warm the air later on.) and being eco-energy for the 21st century. In addition, in our era solar tower can be a major motivated option in energy projects since it has lots of advantages compare to other developments.
Tuesday, October 13, 2009
Wednesday, October 7, 2009
Why do people hate wind energy so much?
Public perception to any new product is very important to shape people reaction to that product. Wind power was one of the subjects that bring lots of discussions and arguments to the public. As we know wind turbines are local issues and people have not experience them before so when wind farms started to develop in some areas the residence are affected by other peoples who doesn’t have any knowledge of wind power in action and other resources such as public media.
Some surveys exposed that 85% of the community support the use of general renewable energy and 80% are support of the use of wind power and even 70% would be have a problem to live within 5 miles of a wind power farms. Although it proves that the majority of the public report about wind turbines is positive considering the negative view of the wind power is necessarily.
There are couple reasons that people disgust the wind power. First people think wind turbines are not natural looking. This seems to come from the people who believe nature should be perfect and not spoiled by signs of human activity. Second people think wind turbines are not truly very effective and they are more a public relations trick. This is usually come from engineers who have done the numbers critical in the field. In fact those engineers are not disagreed with the wind generation as much as they are disappointed of the public reaction to the wind power. They try to argue that wind power will not solve all energy problems in the world. The third is wind turbines kill more birds than it should be but by checking the charts and graphs the numbers of the birds killed by glass tower is much bigger than wind turbines. Also in reality the number of the birds who killed by wind turbine is less than 1%. Fourth they are nice to look at but work as a noise factor. In fact wind farms are not really close to the resident area and the noise will not make any problems for dweller. As a result all these people think the wind generation is a dangerous distraction and it will make more problems instead of solving any.
People with negative approach should accept that the wind energy is one of the world's fastest growing sources of energy. Factually hundreds of new wind turbines are developing from fields across the world every year. With such explosive growth the questions about what they should look like or where they must and must not be installed is meaningless. The more important thing is be concerned about our usages in the world and try to conserve our natural resources.
Some surveys exposed that 85% of the community support the use of general renewable energy and 80% are support of the use of wind power and even 70% would be have a problem to live within 5 miles of a wind power farms. Although it proves that the majority of the public report about wind turbines is positive considering the negative view of the wind power is necessarily.
There are couple reasons that people disgust the wind power. First people think wind turbines are not natural looking. This seems to come from the people who believe nature should be perfect and not spoiled by signs of human activity. Second people think wind turbines are not truly very effective and they are more a public relations trick. This is usually come from engineers who have done the numbers critical in the field. In fact those engineers are not disagreed with the wind generation as much as they are disappointed of the public reaction to the wind power. They try to argue that wind power will not solve all energy problems in the world. The third is wind turbines kill more birds than it should be but by checking the charts and graphs the numbers of the birds killed by glass tower is much bigger than wind turbines. Also in reality the number of the birds who killed by wind turbine is less than 1%. Fourth they are nice to look at but work as a noise factor. In fact wind farms are not really close to the resident area and the noise will not make any problems for dweller. As a result all these people think the wind generation is a dangerous distraction and it will make more problems instead of solving any.
People with negative approach should accept that the wind energy is one of the world's fastest growing sources of energy. Factually hundreds of new wind turbines are developing from fields across the world every year. With such explosive growth the questions about what they should look like or where they must and must not be installed is meaningless. The more important thing is be concerned about our usages in the world and try to conserve our natural resources.
Internal heat gain = electrical equipment and residents of the house give off the heat in the building. Heat gain from electricity is almost equal to the electricity usage in a building or zone. The average use of the electricity in American house is 11,000 kWh/yr. Some examples are microwave, computer laptop, coffee maker, TV and refrigerator. The best ways to manage or reduce internal heat are first change our equipments to more efficient product (energy star product), second reduce the use when it is not necessarily and the third use ceiling fans or indoor air motion in hit days of summer instead of air conditioning.
Conventional heating = since the conventional heating truly can save amount of energy and money for people the best way to reduce the energy consumption is check the existing heating system and ensure that the system works accurate. If not, consider purchasing a high efficiency model since they would help to reduce energy costs as well as conserve our natural resources. As the software recommended us for some area like Los Angeles, design a garage or storage space on the side of the building facing the coldest wind could help insulate.
Passive solar direct gain low mass and high mass = for passive solar gain main thing is help the building to gain more solar power and keep the heat inside. Material of the building would make a big difference in keeping heat. Accurate insulation for the floor and wall can keep the heat inside during the winter. As it is recommended on the program it is better to face most of the glass area south to maximize winter sun contacts but design some overhangs or sun shade to completely shade glass area in the summer time. Also it is better to not be planted trees in front of passive solar windows.
Sun shading = Sun shading is really important for Los Angeles area since they need maximum sun shading for winter and minimum sun shading for summer. So each season has a different approach to it. As mentioned on the top create some overhangs to completely shade glass area in the summer time help the house to keep the energy inside the building. In some windy climate sun shading can protect the house from the wind as well as sun.
Comfort = Comfort in the building deign need to consider as well. By design the Sunny wind-protected outdoor spaces we can reduce the energy waste in colder area. In addition, in some climate area like LA square footage of the building is important. When floor area is smaller the amount of the waste by heating and cooling energy is less as well.
Conventional heating = since the conventional heating truly can save amount of energy and money for people the best way to reduce the energy consumption is check the existing heating system and ensure that the system works accurate. If not, consider purchasing a high efficiency model since they would help to reduce energy costs as well as conserve our natural resources. As the software recommended us for some area like Los Angeles, design a garage or storage space on the side of the building facing the coldest wind could help insulate.
Passive solar direct gain low mass and high mass = for passive solar gain main thing is help the building to gain more solar power and keep the heat inside. Material of the building would make a big difference in keeping heat. Accurate insulation for the floor and wall can keep the heat inside during the winter. As it is recommended on the program it is better to face most of the glass area south to maximize winter sun contacts but design some overhangs or sun shade to completely shade glass area in the summer time. Also it is better to not be planted trees in front of passive solar windows.
Sun shading = Sun shading is really important for Los Angeles area since they need maximum sun shading for winter and minimum sun shading for summer. So each season has a different approach to it. As mentioned on the top create some overhangs to completely shade glass area in the summer time help the house to keep the energy inside the building. In some windy climate sun shading can protect the house from the wind as well as sun.
Comfort = Comfort in the building deign need to consider as well. By design the Sunny wind-protected outdoor spaces we can reduce the energy waste in colder area. In addition, in some climate area like LA square footage of the building is important. When floor area is smaller the amount of the waste by heating and cooling energy is less as well.
Monday, October 5, 2009
Saturday, October 3, 2009
Thursday, October 1, 2009
من سالها بود كه خدا را باور نداشتم چون همیشه فکر میکردم خدای كه نتونه جهانه بی نقص خلق کنه خدا نیست. خدای كه جنگ را برای لذت خلق کنه خدا نیست. خدای كه از درد کشیدن دیگران اخم نکنه خدا نیست. روزی كه این کوچولو ته دلم جوونه زد، داشتم شک میکردم به اعتقادم. كه شاید واقعا خدایی هم باشه كه بتونه شادی بیاره. حالا کاملا گم شدم
دلم قرص فراموشی میخواد. باید یادم بره. میخوام كه یادم بره. درد از روح ام آغاز شده و تمام جسمم را در از بین میبره. روز دوشنبه کوچولوی ۲ ماهه و نیمه ام را از دست دادم. دردش تمام بدنم را داره داغون میکنه
از چهارشنبه پیش شروع شد. صبح چهارشنبه وقتی كه رفتیم مطب دکتر ازم خواست كه برم برای اولترا سند. خیلی درد داشتم. چند روزی میشد كه از درد نتونسته بودم راحت بخوابم. ولی توی اتاق اولترا سند همه چی از یادم رفت. وقتی كه عکسش روی صفحه مانیتور ظاهر شد مثل اینکه همه دنیا دوره سرم میچرخید. داشت دست و پا میزد مثل ماهی قرمزی كه توی تنگ آب شنا میکنه. صدای ضربان قلبش آرامم کرد. اونجا بود. خیالم راحت شده بود از اینکه جاش راحته. تنها چیزی كه نگرانم میکرد این بود كه درد داشتم. دکتر باهام حرف زد و گفت كه همه چی خوبه ولی اگر بچه حس کنه كه نمیتونه کامل رشد کنه خودش جلوی رشد خودش را میگیره
جمعه درد بیشتر شد و بدن ام شروع کرد به خونریزی. وقتی كه زنگ زدم به بیمارستان گفتند كه اگه مقدار خونریزی کم است هیچ خطری نیست و بیخود نگران نباشم. این داستان تا یکشنبه شب ادامه پیدا کرد تا اینکه وقتی ساعت ۲ نیمه شب دیدم كه دیگه فاصله درد و خون را از هم تشخیص نمیدم فهمیدم كه دارم از دستش میدم. صبح روز دوشنبه توی مطب دکتر تا قبل از اینکه دستگاه اولترا سند را روشن کنه هنوز ته دلم امید داشتم كه حالش خوبه. وقتی دستگاه را روشن کرد خشک ام زد. بچه مثل ماهی قرمز های شب عید كه چند روز بعد از عید میمیرن مرده بود
I am so sorry sweetie هیچی نمیشنیدم. فقط صدای دکتر از ۱۰۰۰ کیلومتر اونطرف تر آمد كه گفت
از چهارشنبه پیش شروع شد. صبح چهارشنبه وقتی كه رفتیم مطب دکتر ازم خواست كه برم برای اولترا سند. خیلی درد داشتم. چند روزی میشد كه از درد نتونسته بودم راحت بخوابم. ولی توی اتاق اولترا سند همه چی از یادم رفت. وقتی كه عکسش روی صفحه مانیتور ظاهر شد مثل اینکه همه دنیا دوره سرم میچرخید. داشت دست و پا میزد مثل ماهی قرمزی كه توی تنگ آب شنا میکنه. صدای ضربان قلبش آرامم کرد. اونجا بود. خیالم راحت شده بود از اینکه جاش راحته. تنها چیزی كه نگرانم میکرد این بود كه درد داشتم. دکتر باهام حرف زد و گفت كه همه چی خوبه ولی اگر بچه حس کنه كه نمیتونه کامل رشد کنه خودش جلوی رشد خودش را میگیره
جمعه درد بیشتر شد و بدن ام شروع کرد به خونریزی. وقتی كه زنگ زدم به بیمارستان گفتند كه اگه مقدار خونریزی کم است هیچ خطری نیست و بیخود نگران نباشم. این داستان تا یکشنبه شب ادامه پیدا کرد تا اینکه وقتی ساعت ۲ نیمه شب دیدم كه دیگه فاصله درد و خون را از هم تشخیص نمیدم فهمیدم كه دارم از دستش میدم. صبح روز دوشنبه توی مطب دکتر تا قبل از اینکه دستگاه اولترا سند را روشن کنه هنوز ته دلم امید داشتم كه حالش خوبه. وقتی دستگاه را روشن کرد خشک ام زد. بچه مثل ماهی قرمز های شب عید كه چند روز بعد از عید میمیرن مرده بود
I am so sorry sweetie هیچی نمیشنیدم. فقط صدای دکتر از ۱۰۰۰ کیلومتر اونطرف تر آمد كه گفت
و بعد دستی كه بغلم کرد و سعی کرد جلوی هق هق گریه ام را بگیره. بعدش را یادم نیست. فکر کنم چند ساعت را توی اتاق بودم تا حالم جا بیاد. دکتر میخواست بدونه كه تصمیم دارم چه کنم؟ میخوام برم برای جراحی یا اینکه صبر کنم كه بدن ام خودش بچه را پس بده. گیج بودم و نمیتونستم تصمیم بگیرم
سعی کرد جای هر دوتامون تصمیم بگیره Med
گفت كه جراحی میکنیم و قرار جراحی را گذاشت برای چهارشنبه صبح. ولی همون شب خونریزی بدتر شد و قبل از اینکه بفهمم زیر سرم مرفین بدن ام بچه را پس داد. بعد از آن فقط درد دارم و درد و درد. روحی بیشتر از جسمی
Subscribe to:
Posts (Atom)