Eco/304 Week 2 Essay
Elaine Vieira
Week 2 iLab –
Exercise 1 * Compare/contrast commercial wind turbines "offshore" versus "on land". Land wind turbines “on-shore” are installed in land-based applications, while “off-shore” wind turbines are installed over water. There are some advantages and drawbacks; such as the environmental impact of offshore wind is considerably reduced compared with those onshore; although noise and visual impact are questionable to be problems there are some concerns. For example, there could be an environmental impact such as localized disturbance of the seabed from the noise caused by the turbine underwater. Another fact are that off-shore turbines tend to have larger ratings, because the cost of installation is greater, according …show more content…
is not known per square foot average, as the cost of a system in fact depends on know how much energy (kilowatt-hours, kWh) the owners you use daily, how many full sun hours you receive per day; and if you have other sources of electricity. Another fact is that depending on wind speeds in a particular area, a homeowner may install two or three systems to generate 100 percent of the required power. As an example one homeowner in Nevada installed a single Wind spire to generate about 25 percent of his home’s power supply. Each Wind spire will generate approximately 2,000 kWh a year based on 11 mph average annual wind speed.
According to monthly average graphic below provided by AltE Store these examples represent only a small sample of possible combinations of electricity usage for households, to demonstrate the amount of PV it will take. To power the need depends upon electricity use and NOT the square footage of your home. Some examples of household usage | Solar Electric Info | | Square Footage | Electrical usage (kwh) | average kwh/ square foot | # of watts of PV to cover 100% of electricity usage | Watts PV/ Square Foot | Main heating source | 1000 | 377 | .377 | 2200 | 2.2 | Oil | 1270 | 250 | .197 | 1500 | 1.1 | Gas | 1800 | 250 | .139 | 1500 | 1.1 | Propane | 2000 | 295 | .148 | 1700 | 0.9 | Oil | 2650 | 1175 | .44 | 6900 | 2.9 | Oil | 2800 | 1010 | .36 | 5900 | 2.1 | Oil/wood | 3000 | …show more content…
Geothermal heat pump doesn 't create heat by burning fuel, like a furnace does. Heating utilizes the natural temperature of the ground at about 10 feet and below which averages about 68 degrees Fahrenheit. In winter it collects the Earth 's natural heat through a series of pipes, called a loop, installed below the surface of the ground or submersed in a pond or lake. Fluid circulates through the loop and carries the heat to the house where an electrically driven compressor and a heat exchanger concentrate the Earth 's energy and release it inside the home at a higher temperature. Ductwork distributes the heat to different rooms. In summer, the process is inverted. The underground loop draws excess heat from the house and allows it to be absorbed by the Earth. The system cools your home in the same way that a refrigerator keeps your food cool, by drawing heat from the interior, not by blowing in cold
Week 2 iLab –
Exercise 1 * Compare/contrast commercial wind turbines "offshore" versus "on land". Land wind turbines “on-shore” are installed in land-based applications, while “off-shore” wind turbines are installed over water. There are some advantages and drawbacks; such as the environmental impact of offshore wind is considerably reduced compared with those onshore; although noise and visual impact are questionable to be problems there are some concerns. For example, there could be an environmental impact such as localized disturbance of the seabed from the noise caused by the turbine underwater. Another fact are that off-shore turbines tend to have larger ratings, because the cost of installation is greater, according …show more content…
is not known per square foot average, as the cost of a system in fact depends on know how much energy (kilowatt-hours, kWh) the owners you use daily, how many full sun hours you receive per day; and if you have other sources of electricity. Another fact is that depending on wind speeds in a particular area, a homeowner may install two or three systems to generate 100 percent of the required power. As an example one homeowner in Nevada installed a single Wind spire to generate about 25 percent of his home’s power supply. Each Wind spire will generate approximately 2,000 kWh a year based on 11 mph average annual wind speed.
According to monthly average graphic below provided by AltE Store these examples represent only a small sample of possible combinations of electricity usage for households, to demonstrate the amount of PV it will take. To power the need depends upon electricity use and NOT the square footage of your home. Some examples of household usage | Solar Electric Info | | Square Footage | Electrical usage (kwh) | average kwh/ square foot | # of watts of PV to cover 100% of electricity usage | Watts PV/ Square Foot | Main heating source | 1000 | 377 | .377 | 2200 | 2.2 | Oil | 1270 | 250 | .197 | 1500 | 1.1 | Gas | 1800 | 250 | .139 | 1500 | 1.1 | Propane | 2000 | 295 | .148 | 1700 | 0.9 | Oil | 2650 | 1175 | .44 | 6900 | 2.9 | Oil | 2800 | 1010 | .36 | 5900 | 2.1 | Oil/wood | 3000 | …show more content…
Geothermal heat pump doesn 't create heat by burning fuel, like a furnace does. Heating utilizes the natural temperature of the ground at about 10 feet and below which averages about 68 degrees Fahrenheit. In winter it collects the Earth 's natural heat through a series of pipes, called a loop, installed below the surface of the ground or submersed in a pond or lake. Fluid circulates through the loop and carries the heat to the house where an electrically driven compressor and a heat exchanger concentrate the Earth 's energy and release it inside the home at a higher temperature. Ductwork distributes the heat to different rooms. In summer, the process is inverted. The underground loop draws excess heat from the house and allows it to be absorbed by the Earth. The system cools your home in the same way that a refrigerator keeps your food cool, by drawing heat from the interior, not by blowing in cold