23.08.2019

Energy Efficient Home: Save energy and money

143.jpgSome experts argue that residents of energy-efficient homes save about 50% on utility bills. The main problem is that residential complexes, which are being massively built today, for the most part do not meet the standards of energy-efficient housing. Ksenia Pashkevich, Leading Architect of the Metropolis Company, spoke about the fate of energy-saving technologies in Russia specifically for Novostroy-M.

 




Energy conservation is an extremely relevant trend for the construction industry This industry has traditionally been one of the main energy consumers, absorbing about 40% of the world's energy resources. At the same time, 2/3 of the energy consumed by real estate is spent on heating, ventilation and air conditioning of buildings. Unfortunately, not all of the energy consumed by buildings goes to their maintenance. There is such a thing as heat loss. In real estate, heat loss varies depending on the characteristics of a particular house, for example, its height and construction technology. In the worst case, they can reach 90-95%, that is, the lion's share of the heat entering the building will go to the street. Most of the heat loss occurs through the enclosing structures (walls and windows) - up to 75% of the heat consumed. To reduce heat loss, energy-efficient technologies aimed at energy conservation and replenishment of energy consumed are increasingly being used in the construction of buildings.


For the first time, the world community was thinking about building energy-efficient buildings after the world oil crisis of 1974. Then similar technologies already existed and were tested in practice. The first energy-efficient high-rise building was the seven-story office center, built in 1972, designed by architects Andrew and Nicholas Isaac. Later, British architect Norman Foster made a significant contribution to the development of energy-efficient facilities. Designed by him in 1997, the high-rise building of Commerzbank in Germany made a real revolution in high-rise construction.


In Russia, these technologies have recently used, after the adoption in 1996 of the Federal Law №28-F3 "On energy saving". One of the first Russian facilities erected using energy-efficient technologies is the experimental 17-storey residential buildings of the 111-355 MO series built in 2001 in the Moscow Nikulino-2 microdistrict. The main renewable energy source for them is the heat of the soil, the secondary - the heat of ventilation emissions. Heat pumps use these energy sources for hot water systems. Thanks to these technologies, it was possible to almost halve (by 46%) the reduction of energy consumption by buildings. Thus, the experimental construction of the 111-355 MO series can be considered successful.

 

Another example of energy-efficient construction is located in the city of Sergiev Posad. Residential building of energy efficiency class “B ++” was commissioned in 2015. It has solar panels that help illuminate common areas, and the exterior walls are made using Plastbau fixed formwork technology. As a result, the thermal energy saving in the building is 50%, the electric power is 20%, and the saving on public utilities for residents is 20% from one square meter. 

 

In the same 2015, another mid-rise residential building was commissioned in the Klinsky district. It has an energy efficiency class “A”. The external walls of the building are made of porous ceramic block POROTHERM 25 10.7 NF with a finish connected by the NEOPOR 35 130 mm insulation system. In terms of engineering systems, it has designed 3 heat pumps for the heating system, 48 vertical geothermal probes and 1 heat pump for the hot water system. Cost savings for utility bills per 1 sq.m for heating is 65%, for domestic hot water - 70%. In general, in Russia, there are about 150 residential buildings of medium and high storeys built using energy-efficient technologies. However, in mass construction, energy-efficient technologies have not yet been continuously applied.


Read the full article in Novostroy-M