terra-ist asked:


I am interested in this as a contribution to global warming.

I have heard several commentators mention this as a problem in passing, but can find no sources on the magnitude of the problem.

I am also interested in the impacts of generating energy from sources that create combustion heat, such as nuclear and biofuel; or geothermal that released a lot of heat at once.

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Ertai2 asked:


One thing I dont understand is there are a gazillion ways to produce heat yet heat is still very expensive. Heat can be produced from solar, electricity, fire, oil, gas, geothermal, friction, movement, crystal, radiation, bacteria, pressure, and even uranium! And that doesnt include the many ways we have of trapping, and transfering heat. Is it really that hard to find a cheap form of heating? I just wanted to point that out. Now on with the question …

I notice most portable heaters consume 750 watts low setting, 1500+ watts for a higher setting. This is very energy consuming. ARE THERE ANY DEVICES OUT THERE THAT CAN HEAT A ROOM USING 100 WATTS OF ELECTRICITY? If an element is capable of giving off free heat, why cant we find the next “hottest” thing?

Its the 21st century and it seems we’re paying more than what they used for heating thousands of years ago. Wood was free back then. Oil, gas, and electricity is not. Without using oil and gas which burning any garbage will give you the same output, where are we with electrical heating? IS 1000 WATTS THE BEST WE HAVE DONE IN HEATING A SIMPLE ROOM? Any other alternatives out there? Like a portable wood stove? I suppose this question should be in regards to camping. What is the best way to heat a tent for example? Could you light a fire outside and have a fan blow in the heat? Or how about a portable wood stove? If theres an electric heater that can be powered using solar panels, then thats what I would like to find out. Thanks guys ===

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rock77 asked:


My home has a split A/C system. The condensing unit is outside and the furnace and evap coil is inside the house. The evap coil was replaced on March 2008 with Trane model # 2TXCC049BC3HCAA. I need to replace the condensing unit with a new Trane unit model # 4TRR3048A100A that uses R-410A refrigerant. My existing system uses R-22.
My question is: Is it OK to keep the existing evap. coil for R-410A with the new condensing unit? What problems might occur if I do this?
My home has a split A/C system. The condensing unit is outside and the furnace and evap coil is inside the house. The evap coil was replaced on March 2008 with Trane model # 2TXCC049BC3HCAA. I need to replace the condensing unit with a new Trane unit model # 4TRR3048A100A that uses R-410A refrigerant. My existing system uses R-22. My question is: Is it OK to keep the existing evap. coil for R-410A with the new condensing unit? What problems might occur if I do this? A/C tech said if add Thermal Expansion Valve (TXV) to the indoor coil and a suction drier , evacuate the current refrigerant ,clean both coil , the exiting evap.coil will work with r-410A.any suggestion?

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moonlit333 asked:


1. These Golden Falls are considered by far Europe’s most powerful waterfall
2. In 1974, this was declared a national conservation area, and since then it has become one of the most popular tourist destinations in the country. This place received its name due to all of the gnats swarming in the area
3. This is a unique geothermal spa where guests relax in warm geothermal seawater
4. Some of the best and most important sagas took place here, and it is said that Christopher Columbus once spent a winter here. You can also see one of the most mysterious and popular glaciers here
5. This place was given the name “Steamy Bay” after the geothermal steam seen throughout the area, which today heats homes and outdoor swimming pools throughout the city, a pollution-free energy source that leaves the air outstandingly fresh, clean and clear

A. Akureyri
B. Blue Lagoon
C. Geysir
D. Gullfoss
E. Lake Myvatn
F. Reykjavik
G. Snaefelsnes Peninsula
H. Thingvellir

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scape.squad.story asked:


House #1: A 20 room mansion (not including 8 bathrooms), heated by natural gas. Add on a pool (and a pool house) and a separate guest house, all heated by gas. In one month this residence consumes more energy than the average American household does in a year. The average bill for electricity and natural gas runs over $2400. In natural gas alone, this property consumes more than 20 times the national average for an American home. The owner paid more than $30,000 in combined electricity and natural gas bills for this estate in 2006. This house is not situated in a Northern or Midwestern “snow belt” area. It’s in the South.

House #2: Designed by an architecture professor at a leading national university. This house incorporates every “green” feature current home construction can provide. The house is 4,000 square feet (4 bedrooms) and is nestled on a high prairie in the American southwest. A central closet in the house holds geothermal heat-pumps drawing ground water through pipes sunk 300 feet into the ground. The water (usually 67 degrees F.) heats the house in the winter and cools it in the summer. The system uses no fossil fuels such as oil or natural gas and it consumes one-quarter electricity required for a conventional heating/cooling system. Rainwater from the roof is collected and funneled into a 25,000 gallon underground cistern. Wastewater from showers, sinks and toilets goes into underground purifying tanks and then into the cistern. The collected water then irrigates the land surrounding the house. Surrounding flowers and shrubs native to the area enable the property to blend into the surrounding rural landscape.

HOUSE #1 is outside of Nashville, Tennessee; it is the abode of the “environmentalist” Al Gore.

HOUSE #2 is on a ranch near Crawford, Texas; it is the residence of the President of the United States, George W. Bush.

An “inconvenient truth”.

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Skull50 asked:


“THE DAY OF DEATH”

Introduction

The year is 2050; the world’s population is booming, just over 8 billion. Everything was about to change in the world. Death was going to come knocking and no one knows about it except for Russia.

Chapter 1
“Death Comes Knocking”

It was summer time in Los Angeles. Mack, Sarah, Emin, Sam, Lauren, and Katie were all in college, but had decided to take a break. They were at the beach chillin’ and were having a great time, until a noise came from an alarm. It was an attack alarm! Someone was attacking Los Angeles. The friends knew what to do. They had to find the nearest Vault Tec vault. A Vault Tec vault was a gigantic vault built into a mountainside.

The vault contained geothermal power supplies, water from an underground river, which was purified by a water purification chip, two G.R.’s (Garden of Restoration). A G.R. is a gold suitcase that contains seeds, a cold fusion generator, and chemicals to turn the deadly wasteland into fertile farmland. The vault could hold up to 500 people. It contained weapons and food that is agriculture and meat. The friends knew where the nearest vault was. It was 1000 feet away from what they could see. The friends looked around and saw people still enjoying the summer heat. They were confused, but knew they had to get to the vault. When they got there, only 100 people were going inside. When they got inside the vault, the doors were closed. They knew it would be an hour until they opened. But all of a sudden they heard a crashing noise! It was the sound of a nuclear bomb explosion! The whole mountain shook like an earthquake had struck, but it wasn’t an earthquake, it was a nuclear bomb! Mack, Sarah, Emin, and Katie were there, but where were Lauren and Sam? They weren’t in the cave; they had been left outside!

Chapter 2
“The Result”
The vault had a camera outside. Everyone looked at the screen that it was being broadcasted on and saw it rotate again and again. All they saw was death, destruction, and oblivion. Everything was destroyed or covered by radioactive dust. Everyone was either in shock, terrified, scared, or crying … their world had been destroyed. Finally someone turned on the radio, turned it to 620 AM and heard the government.

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Getar asked:


The refrigerator is one of the most brilliant inventions in the history of mankind. The refrigerator is a product of eventual inventive evolution. Since time immemorial, humans were in a quest to preserve food. The changing seasons and the extreme weather conditions made methods for food preservation of utmost importance. Over the years, food preservation techniques thrived among the various groups of people all over the world. Food preservation techniques were according to the respective weather and seasonal changes of the different regions and localities. These also varied according to the kind of food being preserved. Livestock, fruits, vegetables and all other edible things vary according to regions and so the technique employed to make these foodstuffs last is as varied as the kind of food which were to be preserved. Food preservation, perhaps, is one of the more important reasons why humanity managed to survive and thrive throughout the millennia.

The ancient Egyptians used salt to preserve food (and yes, corpses as well. But that’s a different story entirely). Eventually, the method of making pickles as a preservation technique for fruits and vegetables, gained popularity among the western and the near eastern countries. These methods evolved from the simplest to the more complicated forms. There are other regions where they stored food in cellars where the air is cooler. Of course there are other techniques like smoking, or canning et cetera.

The downside of pickling and salting and smoking is that the taste of the food changed. Fish and red meat had to be salted to prevent it from spoiling over the long winter season. Salting, of course, makes the food salty. So unless, you eat the fish a little after catching it, you would have to contend with eating salted fish (which can be revolting after eating them for so long) until the next fishing season comes. Sad for your taste buds and sadder still for your health. So people had to think of a better way to preserve food without changing its taste drastically.

Enter the concept of the refrigerator.

Refrigeration uses the principle of lowering the temperature of the food to be preserved to prolong its life and prevent it from spoiling. Very low temperatures prevent bacteria from thriving along the surface of the food thereby making the food more edible longer than when left on a shelf at room temperature.

The earliest style of refrigerating came in the form of ice houses. Natural ice was harvested in the colder regions of a particular country and placed in a store house. The natural ice made the store house cold, obviously, and so people were able to store their foodstuff there. Meats, particularly. And then they thought of the miniature version of these store houses– ice boxes. The same principle of harvesting natural ice were employed. Only, they were placed in boxes. But the ice had to be replenished and the melted ice emptied everyday. This made everything tedious.

Refrigerators slowly evolved into the refrigerator we know now by artificially manipulating the temperature and lowering it to preservation levels. They started off with using ammonia and other chemical fumes to make cooling possible. This however made the refrigerator toxic. It wasn’t only until the second world war when refrigerators came to be safe and free of toxic chemicals while efficiently compressing air to cool the enclosed area.



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twilsson asked:


When people think about electricity, different things come to mind. One person may think about household appliances, another might find himself wondering about lightning, and electricity could conjure up thoughts of Thomas Edison, or his famous invention, the electric light, in yet another person. Yet all agree that electricity has become an essential, irreplaceable part of all our lives and its discovery is one of the most important breakthroughs of modern man. It seems that almost everything that we use in our daily lives runs on electricity, including mom’s stove and oven, dad’s laptop computer and wristwatch, and your cell phone and video games. Even some of our most advanced technology, including supercomputers, satellites, and the latest spy technology, have at least one basic need - electricity. Without it, modern civilization cannot function. Communication over long distances, which is vital to our lives, would be paralyzed, and the comforts of our present environment would be rendered unfeasible. Man himself would be virtually helpless without electricity.

Electricity is used in all kinds of diverse ways and is produced from numerous sources. Some sources of electricity are fossil fuels. In a power plant, fossil fuels (mainly coal) are burned. The heat is used to heat water and create steam to turn turbines to generate the electricity. Coal produces about 40% of the electricity used on earth. Another source is water. The electricity, called hydroelectric power, is generated by turbines. Water behind a dam flows into a channel in the dam called a penstock and turns the turbine, which generates electricity. 25% of the electric energy on earth used by humans is hydroelectric. About 16% of the energy in the world is nuclear power. Uranium or plutonium atoms split in the core of a nuclear reactor, producing intense heat. Water, under high pressure, is pumped into the reactor and comes out extremely hot. The water heats more water in a tank, producing steam to turn turbines. Other minor sources of electric energy include the sun (solar energy), wind (wind power) heat from the earth’s interior (geothermal energy), and biomass (energy release by bacteria in cow manure). Batteries also supply electricity. Unfortunately, renewable sources still account for only 12% of the United States’s supply of electricity.

Humans have been trying to harness the great powers of electricity for a long time. The ancients wondered what lightning was, and attributed different gods to thunder and lightning. Thales, a Greek philosopher, noted that rubbing a piece of amber caused bits of straw to stick to it. (This phenomenon is known today as static electricity). By performing his famous experiment with a silk kite and a metal key, Benjamin Franklin proved that lightning was indeed electricity in 1750, two millennia later. 21 years later, in 1771, Luigi Galvani made an interesting discovery when he found that a dead frog would twitch if touched by two pieces of metal, copper and iron. An electric charge traveled through the animal, which caused the movement. This occurrence would be called galvanism, after Galvani. His associate, Alessandro Volta, used this information to develop the voltaic pile, a forerunner of the battery that produced a steady electric current. The volt, a unit of measurement used to measure electric power, was named after him. Finally, Sir Humphrey David connected some voltaic piles and invented the first battery. Modern batteries are similar to this design.

Modern life is helplessly dependent on electricity. Production of electricity has become an indispensable piece our daily lives as we hope to find more renewable and efficient ways to produce it for its many significant purposes.

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Terri asked:


We are very seriously considering making this investment to help cut our heating bills. We use propane now. Please let me know of any pluses or minuses you may have experienced. Thank you

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Shirapants asked:


I am looking to buy a new house and some of the one’s I like have baseboard heating. To help save money and cut down on pollution I’d like to replace it with a more efficient heating/cooling system. About how much it would cost to replace an old baseboard heating system with a geothermal comfort system. The house already has a duct system in place for central A/C. What would be the total cost of a project like this be (products, installation, etc)?

I am aware of the different types of systems… whether it be vertical, horizontal, or open loops. There are also all-in-one systems and split systems. I was kind of just looking for a general answer. Here is more detail that may help you provide me with a rough estimate of how much it would cost to replace an old heating/cooling system with a geothermal comfort system. The land is approximately one acre and the size of the house is 2,000 square feet. The geographic location is a suburban area in central NJ.

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