Showing posts with label energy savings. Show all posts
Showing posts with label energy savings. Show all posts

Wednesday, September 7, 2011

Feds to dish $78m in advice on cutting energy consumption over 2 years



By Heather Scoffield, The Canadian Press
OTTAWA - The federal government is reviving an energy-efficiency program meant to encourage consumers and companies to cut their energy use.
Natural Resources Minister Joe Oliver is putting $78 million over two years into collecting and spreading information about buying more efficient vehicles, houses, buildings and appliances.
He says the program will assess existing technology and encourage higher energy standards, leading to an anticipated reduction in emissions of four megatonnes by 2016.
The goal is to push provinces to strengthen their building codes, and to provide consumers with detailed information that will allow them to compare energy-efficient products to more conventional products.
The money will also help beef up energy-efficiency measurements for appliances, and encourage better energy labelling and training for workers.
"These initiatives will help Canadians and Canadian businesses save money while reducing greenhouse-gas emissions," Oliver told reporters.
The funding only lasts two years because the government is facing budget constraints, Oliver said.
"We have to balance the environmental objectives with the fiscal situation."
Environmentalists welcomed the announcement, but said it was only a small fraction of what is needed to get Canadians to embrace a more energy-efficient lifestyle.
Tim Weis with the Pembina Institute said the government money will fund solid and useful information and set some higher standards, but it's a far cry from a co-ordinated national strategy with concrete targets to improve energy use.
"It's a foundation to build on," he said.
The program launched Wednesday is the latest version of the EcoEnergy efficiency initiative, a multibillion-dollar program that began in 2007 but expired last March.
In the last budget, the wildly popular home-retrofit side of the EcoEnergy program was extended for one year, with $400 million. At the same time, the government set aside an additional $86 million over two years to promote energy efficiency, but did not release details on how the money would be spent.
Wednesday's announcement explains the renewal of the smaller and less-known efficiency initiatives. Officials did not immediately respond to requests to explain why the amount of money had dropped to $78 million from $86 million.
Oliver stressed that the $78-million investment will create jobs, but added that he did not have a number for new positions.
Rather, officials explained that department would spend the money on research, analysis and gathering information which would encourage industry to invest in energy-efficient options for consumers — indirectly creating green jobs.
"This is about job creation and a clean energy future for Canadians," Oliver said.
Ottawa has committed to a 2020 target of reducing greenhouse-gas emissions by 17 per cent from 2005 levels, mainly by regulating industrial production in lock-step with the United States.
Environment Canada has attributed much of the rise in emissions over the past decade to an increase in oil-and-gas production and a surge in vans, SUVs and trucks on the road.

Sunday, February 6, 2011

Germany leads the charge in low-energy homes



Big heating bills may become a thing of the past
Big heating bills may become a thing of the past - by DW

EU backing for zero-energy buildings has given the German construction industry a boost. As materials become less expensive, the passive house, a German invention, is likely to become a more common sight.

Source: dw-world.de
The German government wants to reduce the energy demand for heating by 20 percent by 2020. From that year on, all new buildings will be required to be Nearly Zero Energy Buildings, which means they use less than 15 kilowatt hours of heating per square meter per year. The average house being built today uses 4 times that amount.
“Of course there are going to be increasing numbers of passive houses,” said Angela Espenbergerof the International Passive House Association (iPHA) in an interview with Deutsche Welle.
She said passive houses are being developed all over the world, including countries where the materials and labor weren’t previously available.
“Companies are finally realizing that there is a real need for products that are passive house suitable. So we have more and more certified products, such as insulation and ventilation systems, that are compatible with passive houses,” Espenberger said.
She believes this boom is going to drive new developments, which will make the technology needed for the construction of passive houses more commercially competitive.
“It’s going to force people to develop more products, which is of course going to influence the economic side of passive houses, making them a lot more affordable.”
At the moment, a passive house costs up to 8 percent more to build than a conventional house.
Karsten Voss, a professor of building physics at the University of Wuppertal, said zero-energy houses will be more commercially attractive, if people change their mindset and start factoring in the long term savings on energy.
“The technology of today can reduce energy needs by 80 percent, compared to the average building. This also means it’s reducing CO2 emissions,” he said.
Considering that buildings account for about 8 percent of greenhouse gas emissions, the passive housing movement could help shrink the housing sector’s carbon footprint.
Germany is becoming a center for energy efficiency experts like Oliver Jirka
Germany is becoming a center for energy efficiency experts like Oliver Jirka - by DW
New inventions
The zero-energy housing boom has seen the development of innovations like high-tech vacuum insulation that is only 2 centimeters thick. This product is still at the prototype stage, but it may one day replace traditional insulation, which is about 30 centimeters thick.
Energy efficient windows, which are less expensive to maintain and replace, are also being developed. If the costs can be kept low, these may eventually become more commercially attractive than conventional windows.
Voss sees Germany as a market leader in low-energy housing. “In the last 20 years, Germany has come to the poll position in that sector, so ‘Made in Germany’ is a very good label for energy efficiency in buildings,” he said.
But Voss said that more needs to be done to improve the skills of construction workers.
“I think we still are in the situation where we have to better educate the contractors in energy efficient buildings, because it’s still a small sector,” he said.
Worldwide, only about 20,000 passive houses have been built. Most of those are in Germany, where passive houses were invented. In two short decades, the country has built 13,000 passive houses.
Oliver Jirka is an architect in Berlin who specializes in energy efficient buildings. His own home is a passive house, which he says is cheaper, quieter and more comfortable than a conventional house.
“Our electricity bills come to around 40 euros per month. A conventional house built this size might pay 150 euros per month,” he told Deutsche Welle.
Even in the winter, this passive house stays warm
Even in the winter, this passive house stays warm - by DW
The passive house experience
On a chilly winter’s day in Berlin, with temperatures pushing minus 10 degrees Celsius (14 degrees Fahrenheit), Oliver Jirka’s house stays at a comfortable 20 degrees Celsius. But the house doesn’t use radiators. This cozy temperature is maintained by the walls of Jirka’s house, which are padded with 40 centimeters of newspaper. The windows are triple glazed and filled with argon gas, which helps limit heat loss.
As light spills through the tall windows, the argon inside them absorbs the sun’s radiation and stops heat from escaping. This is great in the winter and for those hot summer days, Jirka has planted trees to shade the house and stop it from overheating.
As light spills through the tall windows, the argon inside them absorbs the sun's radiation and stops heat from escaping. This is great in the winter and for those hot summer days, Jirka has planted trees to shade the house and stop it from overheating.
The thick walls and triple glazing also make Jirka's house extraordinarily sound proof. In the past, sealed solar-heated homes often had stagnant air and were susceptible to mold. But Jirka’s home has a built-in ventilation system. This means that the building remains airtight, so none of the heat is lost, but it still gets a good supply of fresh air.
"The fresh air passes a filter and we have very clean air. You have more fresh air than by window ventilation," Jirka said.
The filters keep out dust, pollen and other particles, which would otherwise come into the house if the windows were left open for ventilation.
A heat exchanger under the house draws in fresh air from outside. In the summer, warm air is cooled because the ground is colder than the outside atmosphere. In the winter, when the ground is warmer than the air temperature, drawing the air down and over the ground heats it up.
Zero-energy housing developers are now looking for ways to install technology, which will allow more homes like Jirka's to produce energy. Jirka's house does this with solar panels on the roof, which allow him to neutralize his energy consumption.
Author: Natalia Dannenberg
Editor: Saroja Coelho