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admin 15.07.2014

From the same blog post I used as source in my previous post comes this interesting diagram, originally by Cullen & Allwood 2010.
This is a neatly structured and nicely designed example of a energy flow Sankey diagram that could serve as a role model.
In order to start saving money on your energy bills and understand home energy consumption, you have to know where the best place to start is.  You could spend your whole life dedicated to cutting out all of your vampire loads, but that probably isn't going to be the best use of your time when going after heating and cooling would produce a much bigger bang for your buck (and time).
The pie chart above shows the percentage of energy consumed in regards to energy bills in the typical American household.  The chart was constructed from a Dept.
Turn down your temperature setting on your heater to 130° F (don't do much lower to prevent Legionnaires Disease).
And finally you should target your lighting.  But I have a whole category dedicated to this, so this area is covered in detail.
I'm not saying you shouldn't cut out your vampire loads, but spend your time wisely and make sure you target the biggest energy consumers first, then start targeting other areas!  Knowing where to start is half the battle, and Mapawatt Blog is here to help. Tags: energy billenergy starheating and coolinghome energy conservationhome energy consumptionhome energy usehousehold energy usevampire loadswater heatingenjoyed our post? We also found that leaving any pilot light on, or backup hot water tank is a voracious power eater. For ALL the right reasons- Economicall, ethically and environmentally, the absolute BEST thing that anyone can do to reduce their HVAC bills (and a significant portion of domestic hot water heating) is to install a geothermal heat pump system. SKU: 40BPR26Post recycling and conservation signs to help organize your recycling efforts and promote conservation. In this weeklong series, BU researchers explore the science behind Earth’s environmental changes, and what they mean for our future. Cutler Cleveland, a CAS professor of earth and environment, says the time is now to convert to alternative energies. Cleveland’s convictions come not only from his own research, but also from a series of eight seminars that brought environmental experts from universities in the United States and Europe to BU throughout the 2010–2011 academic year. Germany’s production of alternative energy, which provides nearly 11 percent of the country’s energy needs, leads G-20 (a group of finance ministers and central bank governors from 20 major economies) members, states a 2012 report by the National Resources Defense Council. Worldwide investment in solar power has increased sharply in recent years, including in places like Israel, where the Arava Power Company, headed by Yosef Abramowitz (CAS’87), installed 18,500 photovoltaic panels. Cleveland’s research suggests that not a single country will flip its dependency completely to renewables within the next 50 years. And while the federal government has not established benchmarks for wind and solar production, many states have. Nuclear power, another low-carbon energy source, currently provides 3 percent of the world’s energy, Cleveland says, but its hazardous waste disposal and safety risks make it less desirable than wind and solar. The United States has 65 operating nuclear power plants, most of them concentrated along the East Coast and in the Midwest and all of them built more than 30 years ago. Biomass—such as switchgrass, corn, or sugar cane converted to biofuel—is another alternative source of energy, but Cleveland is discouraged by the carbon exchange of the biomass process.
Gas tax hikes, like the one Massachusetts Governor Deval Patrick recently proposed, or divestment from fossil fuels are moves in the right direction. Tomorrow, in part five of our series, professors of environment and economics discuss how taking action to mitigate climate change could affect the economy. Mariners especially sailors have been using wind and solar technology to generate electricity for longer than nearly anyone and sadly we have a long way to go.
On the other hand punishing consumption of fossil fuels by those not inclined not to use alternatives is madness that has a negative impact on the economy. The electricity in my apartment is powered by 100% renewable clean energy via a program offered by Mass.
Spain (double the area, triple the population of New England) met 26% of their electricity demand with wind power during the time period of Nov 2012-Feb 2013.
The earth-advocacy work of Cutler Cleveland, Nathan Philips and others in the Boston University community as well as the current useful coverage by Boston University Today deserves much applause.
I am still looking for a straight answer on why a bunch of incomplete measurements taken over a ridiculously short period gives us enough certainty to upend the world economy.
Why does no one ever talk about planting more trees which serve a multiplicity of purposes not the least of which is absorbing carbon dioxide?
The USA has been using fossil fuels since their inception and will continue to do so unabated until truly affordable alternatives are available.
In the mean time trying to force people to do something they do not want to via higher taxes will only serve to slow economic growth.
I am a mariner and despite the responses to what I have said if alternative renewable energy had really arrived we would be among the first to adopt it as the cost of fuel for a large power boat is exorbitant.


We also like more range when at sea and again would be the first to adopt any renewal system that really worked. People currently have to cover the entire roof on their home with solar panels to generate enough electricity to substantially reduce their costs which exemplifies the square foot requires of these devices. Bio fuels from ethanol crops and bio fuel from recycled used cooking oil ought to be in two different categories under the pie chart. Almost every house can have one with the only exception being one in which there is no place to put in the pipe required for an earth loop.
At least 80 percent of the energy people use to drive, heat their homes, and power gadgets comes from fossil fuels such as coal, oil, and natural gas, and the consumption of all of the above contributes to global warming. In 2011, China invested $51 billion in alternative energy technologies and led the world in renewable power capacity with 70 total gigawatts, according to the international nonprofit Renewable Energy Policy Network for the 21st Century.
Indonesia follows, with roughly 6 percent, and next is the United Kingdom, at about 4 percent. Here in Massachusetts, the legislature passed the Green Communities Act in 2008, requiring that 15 percent of the commonwealth’s electricity come from renewable energy by 2020. Cleveland says that makes planning a new one relatively unknown territory, because there are no current price comparisons.
The first step, he says, should be using fossil fuels to build a sustainable energy infrastructure. Cleveland thinks federal legislation taxing carbon or an international cap-and-trade system would put a bigger dent in emissions.
Wind and solar are now viable, affordable technologies, and will only become more so with greater deployment.
I just signed up to Energy plus’ green option for my electricity, and now have electricity from a 100% renewable source (wind power). 2 problems: very noisy to run - entire house vibrates when they work - had to put in shock-absorbers especially designed for them - better but not completely. The pipes to and from the house have to be buried below the frost line and insulated with very thick insulation.
It may represent a higher percentage because we've been nibbling away at it for years with efficient appliances, CFLs and so on, but it gets us closer to making PV feasible. That same year, the United States put $48 billion in such technologies and achieved total generation of 68 gigawatts. The United States came in seventh, with only 3 percent of its electricity coming from renewables. Government subsidies and technological improvements in the manufacture of turbines have lowered the cost of wind energy, so that it now competes with energy produced by natural gas and burning coal. Massachusetts plans to generate 2,000 megawatts of wind energy within the next seven years and 250 megawatts of solar power by 2017.
It’s also politically risky, as most communities don’t want one in their backyard and are hesitant to adopt a technology that produces radioactive waste with a half-life of thousands of years. The ecologist and author of A Prosperous Way Down argues that to survive, the human species must learn how to decline prosperously. For that we pay an extra $25 or so per month than we would running fossil fuel generated electricity. I want coal, oil or gas derived electricity, I want lots of it and I want it as cheaply as possible.
So you can sit around and talk all you want about the joys of solar and wind, you can praise one another and slap each other on the back for all your great ideas and work, I don’t care. Moreover, the energy (if we don’t consider installation and maintenance of the plants and panels) is infinitely free. The line where these two tiers touch don’t always have direct connections, but the overall arrow magnitide matches. If they are installed they should be installed on their own concrete pad not connected to the frame. We have since found (for the water lines) that insulating them, then putting them in the thick black corrugated plastic drains with a cut along them, and pumping the foamy stuff around kept the temp (Using a thermostat buried 100' away from the house) at 50 degrees when the temp outside was -15F. Pardee Center for the Study of the Longer-Range Future and supported by a grant from the Andrew W.
Germany, the third greatest investor in alternatives, spent $31 billion and reached total capacity of 61 gigawatts.
But solar, which has also benefited from subsidies and technological advancements, and wind account for only a couple of percentage points of total power generation in the world. While far from reaching its wind energy goal, the commonwealth reports that it’s 90 percent of the way to accomplishing its solar goal.


That’s a small fraction of my cell phone bill and chump change when you think about the good it does and the cost of other things you put your money towards. Fossil fuels you need to extract and have it pass through a whole process before you can use it, and thats what makes it price augment. We have such a short amount of time left to curb our emissions before we enter feedback loops (ie.
Solar energy stimulates decentralization in sunny locations, which quite often are isolated. And you can pat yourself on the back for dramatically decreasing your carbon footprint by no longer using gas, oil, propane or straight electrical resistive heating. The commitments have helped Massachusetts tie with Texas for fifth place nationally in a 2012 Ernst & Young report on promising renewable energy markets. The bottom line is this; I want cheap power and I will vote for the person who can deliver it to me.
Wind energy for example, you need no refineries of extraction, you just build the wind turbine and it does all the work for you. This creates jobs, and allows avoiding price volatility, as it is the case with the fossil fuel. Not sure if pollution solution failure is anything related to the fall of this manufacturer. And last, but not least, because solar does not rely on mining of raw materials, the energy production does not need distraction of forests and eco-systems.To avoid being biased, it is probably wise to go over the disadvantages as well. Upwards of 400% efficiency and extremely reliable and with virtually no maintenance (change a filter). But I just think it’s important how we weight the benefits and costs especially the environment costs around solar energy.
Therefore, if you now just a little bit about making project be cost beneficial, you should know much better that the renewables are much cheaper because there is no extraction of refinery involved. The production process is still relatively inefficient due to the need of vast surface area. The storage facilities are not yet optimized, and the panels, especially the higher-efficiency ones, are quite large. And how long can a solar panel last being usable and how often do we need to keep the production with some sort of pollution there though I believe technology is advancing to reduce the pollution risk. And, unfortunately, the biggest disadvantage is the solar energy cost associated with installation and maintenance of the panels.To be fair, ultimately, it always comes down to economics and politics. Many governments encourage the use of solar energy with subsidies and tariffs, as it is seen in California, however history shows that long-term incentives and economic crisis might change people’s views drastically, an example from Spain.But, there is great potential. The idea has been developing since the 1700s and major breakthroughs have encouraged people to continue improving and developing the sector. We will now briefly go over the milestones and will let you, as a reader, decide whether all this past effort makes it worth to invest more time and resources.
We certainly believe it does!History of Solar Energy    1767, Construction of the First Solar Collector The first solar collector was created in 1767 by the Swiss scientist Horace-Benedict de Saussure. It was an insulated box covered with three layers of glass to absorb heat energy.1839, Definition of Photovolataic Effect In 1839, the photovoltaic effect was discovered by the French scientist Edmond Becquerel. He accomplished this using two electrodes placed in an electrolyte, establishing that electricity increased after exposing this electrolyte to the light.1873, Selenium and its Photo Conductivity The year of 1873 will be remembered with the discovery of photoconductivity of a material known as selenium by Willoughby Smith. His researched led to a breakthrough realization that solid could convert light into electricity without heat or moving parts.1883-1891 Light and Solar Cells This period proved to be extremely significant for the development of solar energy.
In 1887, Heinrich Hertz discovered the ultraviolet ray capacity to initiate a spark jump between electrodes. Shortly after, in 1891, the first solar heater was produced.1908, Construction of the Copper Collector This invention belongs to William J. Baileys, who, in 1908, came up with a copper collector made of copper coils and boxes, incorporating copper insulation.
This is still used in manufacturing today.1916, Proof of Einstein’s Photoelectric Effect Although Einstein published the theory of the photoelectric effect back in the year 1905, the proof did not come until year 1916, when the scientist Robert Millikan tested it experimentally. 1958, The first commercial use of Solar Energy Solar energy was officially introduced to the commercial sector, powering space exploration equipment such as satellites and space stations.1959-1970, Efficiency of Solar Cells and Cost This decade will be remembered with the numerous discussions about the efficiency of solar cells, and their effect on energy costs.



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