Month: October 2014

This experiment was quite easy. Learning about how solar power worked by shining a light source, solar panel, and our excel file was pretty fun to do. At first, though, we had gotten some in correct readings when we were first testing it with no light:

No light
-0.09167
-0.07884
-0.06601
-0.07884
-0.09167
-0.09167
-0.02752
-0.01469
-0.01469
-0.02752

We tried to take the readings once again, and it seemed to be well enough. Once measuring the solar power with no light, we tried again holding the light different distances from the panel, from 2 cm, 10 cm, 18 cm, and 26 cm. After using different lengths, colors were placed over the solar panel to see how the solar panel reads when there is a shade of color over it.

No light

-0.06601
-0.07884
-0.09167
-0.09167
0.01097
-0.07884
-0.04035
0.01097
-0.06601
-0.07884

2 cm		10 cm		18 cm		26 cm		Purple		Green		Yellow
0.33172		0.25474		0.08795		0.10078		0.07512		0.21625		0.2804
0.42153		0.24191		0.12644		0.11361		0.01097		0.13927		0.2804
0.31889		0.21625		0.1521		0.07512		0.08795		0.13927		0.37021
0.33172		0.20342		0.16493		0.06229		-0.00186		0.1521		0.2804
0.38304		0.20342		0.17776		0.1521		0.0238		0.25474		0.33172
0.39587		0.24191		0.08795		0.10078		0.11361		0.21625		0.2804
0.42153		0.21625		0.08795		0.12644		0.03663		0.1521		0.29323
0.31889		0.25474		0.08795		0.12644		0.03663		0.1521		0.38304
0.31889		0.16493		0.17776		0.03663		0.11361		0.21625		0.29323
0.46002		0.20342		0.13927		0.11361		0.04946		0.20342		0.37021

After all of these numbers were taken, for each column, the average number was taken.

No light – Average  -0.0576705

2 cm – Average 0.37021

10 cm – Average 0.220099

18 cm – Average 0.129006

26 cm – Average 0.10078

Purple – Average 0.054592

Green – Average 0.184175

Yellow – Average 0.316324

Using the averages from each of the measurements, graphs were made to show the relationships between voltage and color, and voltage and distance.

  

 

This was the end of the experiment. I feel that solar power is a very effective way of power, and it is a good idea to use. Going around the city, I have seen many things that run on solar power, and they seem to work very well.

Tom Vales talk was very quick, only about fifteen minutes, but within that fifteen minutes he did talk a lot. He began talking about Thomas Edison and Tesla. What was first talked about was alternating current versus direct current. At some points of this talk it was a bit difficult to follow along because he was talking quite fast, but he did explain these.

He first explained that alternating current can go up and down, and transformers are used to feed this current into houses. Direct current goes directly to the source of power. He did try to explain that there was something that had to do with these types of currents and Edison verses Tesla. Edison was promoting direct current, and Tesla was for alternating current. Edison’s idea was costly, where Tesla’s idea had a lower cost. He said they had done tests with these currents on animals, although I am not positive how.

One thing that was quite interesting that he had brought along with him was a Tesla coil. This coil could only reach to about a seven inch spark, but he said that he has seen some that can reach up to 50 feet! He first showed us what the spark looked like when he lit it alone:

Next, he would hold two fluorescent lights next to it, not even incredibly close, and this spark was causing them to light:

He did the same thing with a light that had multiple colors on it. It would not light up past where he was holding it, because his had would stop the current of the electricity running through the light:

                                          

Fourthly, he took another rod that had a lightbulb in the middle of it. When he touched this rod to the spark, the light bulb in the middle of the rod lit:

Lastly, he was showing that as he brings the rod closer to the spark, it tried to reach out to the rod as it comes closer. In the photo below, the current has reached out to start to touch the rod:

It was difficult to see in most photos, but once he was done demonstrating how the spark current can light these bulbs and rods, he made the spark spin, and it formed a circle. It almost looked like a small ring of fire. He completed his talk by saying that Tesla had out shown Edison within their current competition, and that without him there would not be alternating current. I thought that this talk was quite interesting, but it was a lot faster than I had thought it was going to be.

 

I felt that this documentary was full of information and helped to understand many things about nuclear power. The movie started pulling you in with the cold vibe it gave against nuclear power. Many opinions were shared about how we should not support this as a country, because there are many dangers within power plants. Some of the issues I have heard of before because there are some basic opinions on nuclear power that everyone seems to know, but there was far more information that I can completely remember.

Radiation is the biggest fear that I hear a lot about in this documentary. Subatomic particles within radiation travel fast and can penetrate the human body, and is very likely to cause damage. If  one of these power plants were to explode, such as Chernobyl in the Ukraine, the radiation can travel and spread extremely far causing lots and lots of destruction to cities, humans, animals, and anything that is in its path.

The photo above is Chernobyl after the radiation destruction. There was barely anything left, and this is one reason why people do not agree with nuclear power. The radiation can be cancerous to humans, and there could be many other dangers if a plant were to explode.

Another thing I noticed in this, is that there was also a lot of focus towards solar and wind power. There were scenes that showed fields filled with solar panels, or mountains with wind turbines. Although these ideas harmful it was brought up that it may not always be sunny or windy, in which that would not be in the favor of these sources of energy. Many people do not like the way these look either, especially when there are wind turbines up on mountains. I can agree seeing these would ruin a view, but there aren’t many places that one would be able to hide something this large.

I did feel that this film did help in trying to understand the effects of nuclear power on global warming, but at times it was hard to follow just because there was so much information to try and process. It was a great way to be able to tell people about the dangers of nuclear power because if people were to not watch this, they may not know much about the topic and this was a good way to help.

 

In this activity, we used a robot to operate a pulley with small weights on it. Each of the weights weighed 20 grams. At first, our robot was not working correctly, so we had some incorrect data at first. This was making our graphs turn out inaccurately and we had to restart to fix our data.

First round of data:

Speed (RPM)		Battery Discharge (mV)		Mass (kg)		Power Level(force)		Time (secs)		Acceleration (RPM/S)		height (m)	g(m/s^2	mgh	power
70.14904	0	83	0	0.22	0	75	0	2.326	0	30.158659		0.2	9.8	0.4312	0.185382631
39.783803	0	56	0	0.14	0	75	0	3.762	0	10.575174		0.2	9.8	0.2744	0.072939926
70.372399	0	208	0	0.18	0	75	0	1.826	0	38.539101		0.2	9.8	0.3528	0.1932092
41.587302	0	56	0	0.18	0	50	0	3.15	0	13.202318		0.2	9.8	0.3528	0.112
54.378887	0	70	0	0.18	0	62	0	1.983	0	27.422535		0.2	9.8	0.3528	0.177912254
68.133136	0	69	0	0.18	0	70	0	2.023	0	33.679256		0.2	9.8	0.3528	0.174394464

Above is the data that we had to change. All the numbers were going up and down when they should have been either increasing or decreasing, not doing both. When we realized this error, we started again and came up with new data.

Second round of data:

24.332344	0	125	0	0.18	0	40	0	5.055	0	4.81352		0.2	9.8	0.3528	0.069792285
42.253521	0	28	0	0.18	0	40	0	3.337	0	12.662128		0.2	9.8	0.3528	0.105723704
39.649024	0	70	0	0.22	0	40	0	3.552	0	11.16245		0.2	9.8	0.4312	0.121396396
38.39926	0	56	0	0.26	0	40	0	4.323	0	8.882549		0.2	9.8	0.5096	0.117881101
64.925483	0	56	0	0.26	0	60	0	2.259	0	28.740807		0.2	9.8	0.5096	0.225586543
91.717791	0	83	0	0.26	0	80	0	1.63	0	56.268584		0.2	9.8	0.5096	0.312638037

Once we had this data straight, we were able to make our graphs:

Each of the graphs goes over different parts of what the robot did with the pulley. The first graph is Acceleration vs Mass. As the mass goes up, the acceleration goes down. Next is the Battery Discharge vs Energy. The battery discharge increases when more energy is being used. For Power vs Power Level, as the power level goes up, the power increases as well. Last was the Acceleration vs Power Level. As the acceleration increases, so does the power level. This turned out well once we were able to use a robot that worked, and take off 20 gram weights increasingly.

 

 

The electricity sector is our most used greenhouse gas emission, and of course people want to help to lower it. Demand Response is something that can now give consumers this opportunity. By reducing their electricity usage, consumers can get financial incentives. Using less energy, of course, saves everyone money if people actually consider how much electricity they are using and try to cut back. Demand Response programs have recently become a very valuable resource.

“Advanced metering infrastructure expands the range of time-based rate programs that can be offered to consumers and smart customer systems such as in-home displays or home-area-networks can make it easier for consumers to change their behavior and reduce peak period consumption from information on their power consumption and costs” (Energy.gov). If the consumers can see and get an idea of how much electricity they are using it will help them to change their behavior and how much they use their electricity.

The chart above explains the system that Mitsubishi Electric had come out with to demonstrate their Demand Response resource. One member of the company states, “The system automatically evaluates fluctuating power-generation costs and electricity-market prices to determine optimized incentives for saving power, thereby helping to stabilize supply and demand management while minimizing costs and benefits for utilities and customers alike” (Mitsubishi).

Demand Response is helping to work toward a new goal, and clearly seems to be helping. New technologies, tools and techniques will eventually be created to continue on helping with this, as well as many further goals in wanting to help the power industry design grow further.

Sources:

http://www.pjm.com/markets-and-operations/demand-response.aspx

http://energy.gov/oe/technology-development/smart-grid/demand-response

http://www.mitsubishielectric.com/news/2013/0214-b.html

The Sawyer Library, located in 73 Tremont, is the main library for us here at Suffolk University. It is one of the facilities here open 8am-12am Sunday through Thursday, and then 8am-8pm on Fridays and Saturdays. This is great and convenient hours for everyone here. The library carries over 200,00 books, and even has books on reserve so if you need one for a class, you can use it while in the library. For books you can check out, they are able to be checked out for 28 days, almost a month! If a book needs to be found you can ask the friendly librarians to help you because they are all happy to help.

If you aren’t only looking for books and prefer to do your reading from your computer, there is an online data base you can access from the library’s website. You can specifically search anything you would like to get the most accurate information you would need. If you need to print something, the library has printers where you can print whatever you need for only 5 cents a page! They have copy machines and scanners that you can use as well. If a student needs to use a computer if they do not own one, they can go into the library and check out a lap top or use one of the desk top computers that they have there.

There are some features of the library some people may not have known about, either. On the ninth floor are the library commons. This is one large area with many chairs and couches people can go hang out at to do work. There are big tables for big groups to do group work, and you can get a nice view of the city if you look out the window. On the third floor of the library there are as well some study rooms that you can get a group and go in to do some work.