Monthly Archives: November 2012

James Skrabak: November 28

On November 28th, James Skrabak was invited in our class. He is currently the director of the safety and health department at CDM Smith.

This was our third time seeing a speaker from the CDM Smith. So at first, I thought the speech was going to be a repeat from the past. However, what James Skrabak said to us during the presentation was very interesting.

He began his presentation with asking with some questions, such as “Do you ever think about safety and health insurances before you enter a company” or “Do you really care about the health or do you can about the salary more”. It was very unusual for a presenter to start his presentation like that so it caught my eye immediately.

As a 25 years of experience in the CDM Smith, he talked to us very confidently. He was giving us all of these lists of what the CDM Smith is providing to the workers and how injuries and other accidents is a huge costs to the company. Even with little cut on a finger can cost the company thousands and thousands of dollars due to the hospital fee and the time the workers cannot work while they are injured. As time progresses, the costs snowballs and can even cause a company to become bankrupt if it keeps happening. When I heard about this, it was very shocking because it felt like as a company, it is very difficult to manage and this built some respect to these big companies.

After that, James Skrabak described about jobs as an engineer. and their  responsibilities in details. Because they depend on roles, he spread the responsibilities into four main jobs: design engineer, contractor, construction/project manager, and owner. He explained about each of the jobs very thoroughly so us non-workers of the company can understand what each jobs are and to see if we were interested in them.

Before leaving, Mr. Skrabak insisted on the fact that we, as students, would not be doing what we are studying in our future career. When he said that, it questioned me.. Am i suppose to keep studying environmental engineering or something else? Ever since his speech, I have been wondering if I should even keep going,

Solyndra Scandal:

Solyndra was a manufacturer of cylindrical panels of thin-film solar cell based in Fremont, California.  This company was very important to the United States because the government was funding the company for more renewable energies. However, in September 1st of 2012, the company closed down due to bankruptcy.
Through the usage of President Obama’s stimulus bill, the Department of Energy funded this company with millions of dollars. But the problem was that the government didn’t really know the money problem that the company was going through. After the company closed down, the government officials when into the company’s history and later found out that the company had tons of loans and could not have survived as long as they did if they didn’t have the funding from the government.
At the end, this event was an important case because it shows how President Obama is suffering and desperate to improve the economy by spending money and showing the public how much work he is doing but it’s not working too well. Also, it also adds doubts to the people if what President Obama is doing is right.

REFERENCE:
http://www.theatlantic.com/politics/archive/2011/09/the-solyndra-scandal-what-it-is-and-why-it-matters/245186/

http://articles.chicagotribune.com/2011-09-18/news/ct-met-kass-0918-20110918_1_solyndra-loan-guarantee-obama-fundraisers-obama-white-house

http://www.nytimes.com/2011/09/24/opinion/the-phony-solyndra-scandal.html?_r=0

Tour of McCormick Building

Today, Cynthia Greene gave us a tour of the McCormack Building in Boston. When we first got to the building, I was extreme scared, because we had to go through some of the most secured securities I have ever seen. It was a lot more scarier and strict than ones in the airports. As we went through the building, we were told to go to the fifteenth floor where we met Cynthia Greene, our tour guide. At first I couldn’t believe that it was a green building because it seemed like one of the tall skyscrapers in Boston.

As she began her tour, Cynthia told us that it was first built in 1930’s, or during the Great Depression, as a post office. The construction gave many jobs to the poor and the unemployed. However, it was burnt down due to a fire accident. As a result, the building had to be rebuilt. After the post office building was done, they named it the McCormack Building to honor the Congressman John McCormack in 1972.

All of these history of the building was very interesting. However, I was really more into learning about the “green” building portion of the building. As she led us to different part of the building such as the roof and some of the rooms, it was obvious that it was very well coordinated. The LED lights they used in the library, the garden at the top of the roof on the fourth floor. All of the stuff that they have fixed recently has been extraordinary. From my eighteen years of life experience, I have never seen such green buildings.

It was a very nice experience with Cynthia and as an environmental engineer, I would like to build something similar to these buildings all over the world.

Experiment Outline: Thermoelectric Generator

Objective:
The point of this experiment is to show that you can create electricity using  difference in water temperature. Through this experiment, we want to prove that coal and oil aren’t the only energy sources to create energy and using thermoelectric can be very eco-friendly and can prevent environmental problems because it doesn’t produce any greenhouse gases.

Materials:
– Two containers
–  Two metal bars
–  One fan
–  One thermoelectric sensor
–  Hot & Cold water

Procedure:
1. Place the two containers next to each other.
2. Then place the each of the metal rods in each of the containers and using a clipper, clip the two metal rods together.
3. When the two rods are clipped, place the thermoelectric sensor between the two rods.
4. When the rods are clipped together, place the fan at the top of the sensor which is hooked onto the sensor.
5. After everything is placed, pour in the hot water in one container and cold water in the other container.

Side-Experiment:
While the experiment is operating, place a voltage-meter to see how much electricity is going through the wire. In addition to this, we will experiment to see if the larger the difference in temperature will give us different results.

Expectation/Hypothesis:
We believe that the temperature difference will cause the fan to spin and the larger the difference, more electricity will form.

Demand Response:

During the summer and winter, we tend to overuse electricity because it’s either too hot or too cold.

For instance, during the winter in Boston and other northeastern region, it gets extremely cold. It sometimes reach below zero degrees Celsius.  When you feel very cold, you feel like turning up the heater to be warmer. But at the same time, your next door neighbor will be doing the same thing. At this point, it doesn’t seem like a very big deal, however if you see the pattern, the next door neighbor of your neighbor will be doing the same thing. As you go on with this continuous pattern, the whole state would be having their heater turned up all the way. This means that there will be a lot of electricity being used at the same time. For heaters to be on, electricity must be used to run the machine as well as heat the air that it takes in. As a result, this causes the air to be not warm but rather mild and in some cases, causes the heater to not work for a certain amount of time because the demand is higher than the supply.  To prevent the loss of too much electricity, some companies does a way of preventing over-usage of electricity by responding to the people and companies by demand response.
Demand Response is when a company would limit our electricity usage at specific times of the day during emergencies or  high electricity prices.
But in some cases, the customers/companies can  engage in demand response to receive some payment for helping companies save energies for others.

References:
http://science.howstuffworks.com/environmental/green-science/demand-response.htm

http://www.ecsgrid.com/demand-response-programs/what-is-demand-response-and-how-does-it-work

http://pearcalifornia.com/what-is-demand-response-program

Solar Energy Lab:

Background:
Solar Energy is not a mainstream renewable energy source yet. However, as we demand more energy, we must move our focus on going green rather than just burning coal and oil. As a result, solar energy will be one of our choices at the end.

Objective:
In this experiment, we experimented on different factors to see in what condition we would get the most energy/electricity from the solar panel.
The two factors that we saw were the distance between our light source and the solar panel and the other factor was how color affects the amount of voltage we will produced.

Experiment One:
In our first experiment, we tested how distance between the light source and the solar panel would affect the result of the outcome.
The Graph: (Below)

Results:
From this result, we can see that as the distance increases between the energy source and the solar panel that the voltage decreases.

Experiment Two:
This experiment, we checked to see what color filter would increase the amount of voltage that would be created. In this case, we picked three colors. (Red Blue Violet)
Graph (Below)


Result:
From this experiment, we can see that having red filter is the most efficient way to produce electricity  and having the purple filter is the worse filter to have since it goes negative.

 

Generator Experiment

Overall:
Our experiment this week was about creating energy through the usage of generators.
We used Faraday’s Law which states that changing in magnetic fluxes through movement of magnet and coiled wires will create an electricity. Our goal was to prove whether if Faraday’s Law was true and if so, how does it change depending on different number of shakes or how change in strength of the shake can cause different results.

Experiment:
For this experiment, we manually created energy by using a hand-held generator. As we shook the generator, the magnet inside will move through the coiled wires which would produce electricity. To see different results, we shook the hand-held generator in different frequencies. With a program called LabView, we were able to  see and compare how number of shakes gave us different voltages.


Result:
From the result that we have calculated, we can see that as we increased the frequency of the shakes or the numbers of time we shook, the voltage output also increased. First of all, it proves that the movement of magnet going through a magnetic field will create an electricity and second of all, we have proven that the increase in number of shakes increases in creation of electricity.

Opinion:
Although this is not a very continuous and efficient way to make an electricity but if we can somehow utilize this ability to make our electricity, then it would help our environment tremendously.

New Generation of Technology: VGO

As a field trip this week, we went to the Museum of Science with our SF-197 class. It was a very interesting experience because there were a lot of stuff that I have never seen before. There were mathematics section, wildlife section, electricity section, and etc. It was overall exciting and interesting to see, however what caught my eyes were the daily show. The topic of daily show changes every month but the topic for this week was a newly invented technology called VGO.

It all started with a story of 6 year old Devon.
Since Devon was born, he has been suffering through serious allergy problem and the only thing that he can touch or eat are potatoes, corn, baby food, and few other food. Because of his condition and how serious the problem is, he is not allowed or it is not safe for him to go out or even attend school. At a age of 8 (second grade) is when we start learn our basic english, math, communication skills and sciences but in his case, he cannot learn these important skills because of his health. However, through different scientific experiments and technology, he can go to school now. Not physically but through the usage of a robot called the VGO. By using VGO, he can manually control this robot to attend every class. On this robot, there is a screen that shows his face and four speakers that releases sounds as Devon speaks to a microphone from his house. If he ever needs to raise his hand, he can click a button and it would flash some lights that indicates that he is raising his hand. With this new technology, he can now talk with friends, answer questions in class and even hangout or talk to his friends during breaks and lunch.
When I saw this presentation at the beginning, I thought it would be those typical presentations where the speaker would use large and scientific words to sound smart to explain about the experiement, but that was not the case. He explained to us as simply as he can to grab our interest and show that this is what is happening in our engineering/technological field these days and how it is evolving everyday. In addition to his well spoken explanation, he also showed us how the  robot works. Although it looked hard, it was very interesting how the controlling mechanism is  slowly developing to be easier and easier. This gives some opportunities to not only kids and teenagers but to elders that cannot move from their beds or etc.
From what I have seen at the Museum of Science, I felt like this robot was the best and hope that these robots will evolve even more in the future.

Final Project: Brain-storming Session

This week, Dr.Shatz introduced us to our final project for this class.
We are suppose to create and present a powerpoint considering about sustainability to high school students as our final project. As a group, we decided to make our topic to be “Sustainability and Renewable/Green Energy.”

We aren’t really sure what we are doing specifically because it’s our first time meeting up together and talking about our topic but we have a broad idea of what we want to do with our project. We would start off talking about climate change and all the subtopics. Such as causes, effects, solutions, and what we are doing to prevent climate change to proceed even more.
Furthermore, as an experiment we are planning to create a hand-held generator but we aren’t really clear what we really want to do. I hope we can create something very original other than just copper wires and magnet. Something that would make everyone surprised about our experiment.  We will keep working and refining our topic as well as our experiment next week.

Jay Wetherbee: October 17, 2012

This week’s speaker was Jay Wetherbee. He works for Veolia Water, the world’s leading operator in water services  and he is also an assistant project manager at the Smithfield Wastewater treatment plant and is the leader for the town pump stations and collection system.

He started off talking about his career as a waste water treatment operator. At first, I thought listening to waste water wouldn’t be that interesting but as he started talking more and more, i found it very interesting.
He first began with how treatment facilities work. The process begins with removing roots, rags, cans and large debris from the system. Then a grit removal happens. (removes sand and gravel). According to Mr.Wetherbee, this process is the most important because this is what most wastes have problems with. If all of the debris cannot be removed, then it goes to another haul as landfill. The rest of the sewage then gets move down to smaller grit removal, this causes the water velocity increases. As the movement changes, the water is freshened and more oil is removed. The top layer of the sewage gets cleaner and heavy solids sick down and settles there. Those solids at the end gets removed to the sludge disposal where it would get disinfected with sodium hypochloride and ultraviolet.

During his talk, he was emphasizing very strongly on the process of disinfection. He was stating how usage of sodium hypochloride has been an extremely big problem in the cities. Although getting this chemical is very cheap, it is causing an enormous amount of contamination especially in Rhode Island and Massachusetts. So lately, they have been adding sodium bisulfide to clean the residue of what the sodium hypochloride leaves over.

From what i have heard this day, i thought it was very environmental in a sense that people are trying to be more eco-friendly with this world.