The importance of building energy efficiency, what is building energy efficiency

1. It can alleviate the tension of energy resources, and building energy conservation is the need of social and economic development;

2. Building energy conservation is the need to reduce air pollution, and building heating and dietary energy are the two main factors that cause air pollution, such as dust and acid rain in Chongqing.

Serious hazards, serious air pollution;

3. Building energy conservation can protect the ecological environment and improve the quality of the building thermal environment, with the development of modernization and the improvement of people's living standards, a comfortable building thermal environment has increasingly become the need of people's lives;

4. Building energy conservation is the need for the development of the construction industry, and the scope of building energy conservation in China includes: energy conservation of building heating, air conditioning and lighting, and combined with the improvement of building comfort.

1.The significance of energy conservation in enterprises The implementation of energy-saving improvements in enterprises can not only reduce energy consumption costs, but also help to alleviate energy and construction pressure, and protect the environment by reducing waste gas pollution.

It also has great practical significance.

2. The significance of building energy efficiency.

Building energy efficiency is the implementation of people-oriented, comprehensive, coordinated and sustainable scientific development concept.

It is an important measure to reduce environmental pollution and realize the harmonious development of man and nature.

3.5. The significance of building energy efficiency:

1. It is beneficial to the national economy.

The current energy-saving effect of residential buildings is poor, and the total energy consumption accounts for 30% of the total energy consumption of the society, which is easy to lead to peak electricity consumption (power rationing in summer).

2. It is conducive to environmental protection.

3. Save social resources and improve living standards.

and other related technologies and industrial progress.

Building energy conservation refers to reducing energy consumption as much as possible in the production of building materials, the construction and use of buildings and structures, under the condition of meeting the same needs or achieving the same purpose.

Building energy conservation specifically refers to the implementation of energy-saving standards, the use of energy-saving technologies, processes, equipment, materials and products in the process of planning, design, new construction (reconstruction, expansion), renovation and use of buildings, to improve thermal insulation performance and the efficiency of heating, heating, air conditioning and refrigeration heating systems, and to strengthen the operation and management of building energy systems.

The use of renewable energy, on the premise of ensuring the quality of the indoor thermal environment, increase the heat resistance of indoor and outdoor energy exchange, so as to reduce the energy consumption of heating systems, air conditioning and refrigeration heating, lighting, and hot water** due to large heat consumption.

The Significance of Building Energy Efficiency:

1. Promoting the development of building energy conservation and green buildings is an important embodiment of promoting the construction of ecological civilization in the process of new urbanization.

It is of great practical significance to accelerate the development of building energy conservation and green buildings, and to plan, construct and operate in accordance with the requirements of resource conservation and environmental friendliness in terms of spatial layout, infrastructure support, building construction and operation management of urban and rural construction, so as to promote the transformation of urban development from scale expansion to quality improvement, so as to guide China to take a new urbanization path and implement the requirements of ecological civilization construction.

2. Promoting the development of building energy conservation and green buildings is an important measure to implement the national energy consumption revolution and energy security strategy.

Promoting the energy consumption revolution and curbing unreasonable energy consumption is a strategic deployment made by the first and foremost. Through building energy conservation and the development of green buildings, we will guide urban and rural construction to take the development path of energy saving, high efficiency, green and low carbon, so that China can achieve the relatively high living needs of the people with lower energy consumption, and can effectively slow down the growth rate of total building energy consumption.

3. Promoting the development of building energy conservation and green buildings is an important part of promoting the prevention and control of air pollution and responding to climate change.

Promoting building energy conservation and green buildings, and changing the extensive energy consumption mode in the construction mode and use process of buildings can significantly improve the environment of the construction site, effectively reduce construction dust, reduce coal-fired heating consumption, reduce sulfur and nitrate pollutants and carbon dioxide emissions, and promote environmental protection and air quality improvement.

Reduce the pressure of greenhouse gas emissions, improve people's living conditions, and improve the satisfaction and happiness of the whole society.

4. Promoting the development of building energy conservation and green buildings is an important starting point for promoting the transformation and upgrading of the construction industry.

Promoting the development of building energy conservation and green buildings, accelerating the development of ultra-low energy consumption buildings, new structural system buildings, prefabricated buildings, etc., can effectively promote the industrial upgrading of China's construction industry and ensure that it catches up in the new round of scientific and technological revolution in the field of construction.

Taking public buildings as an example, the benchmark is to use the public buildings built in the early 80s of the 20th century as the basis for comparing energy consumption, which is called "benchmark buildings"."。The parameters of the "benchmark building" envelope, HVAC equipment and systems, and lighting equipment are all selected according to the situation at the time. Calculate the annual HVAC and lighting energy consumption of the "benchmark building" as 100% while maintaining the indoor environmental parameters agreed upon in the current standard.

We then adjust the parameters of the building we are designing according to the specified parameters or measured parameters of the energy-saving standards, that is, the envelope, HVAC, and lighting parameters are set or measured according to the provisions of the energy-saving standards, and calculate the annual HVAC and lighting energy consumption. 100%-(Design Building Energy Consumption Benchmark Building Energy Consumption)% is the energy saving rate of the building.

The simple understanding is to "insulate" the building, so that the outdoor high temperature is not transmitted to the interior in summer, and the indoor temperature is not emitted to the outside in winter, so as to save energy (saving energy for indoor cooling in summer and indoor heating in winter).

Generally, thermal insulation materials are mainly used to insulate walls and roofs, and insulating windows and doors are insulated (insulated doors and windows and insulating glass, etc.).

Building energy conservation is to save the energy consumption of the building, such as: using energy-saving lamps to reduce electricity consumption; Another example is to use insulation materials to separate the exterior wall of the building from the outside, so that the energy exchange between the outside and the interior is reduced, so as to reduce the energy consumption of air conditioning and other energy savings.

Building energy efficiency includes:

1. The scope of building energy conservation is still relatively large, such as from the thermal insulation technology of the wall including the roof, the selection of new energy-saving materials can achieve the effect of building energy saving.

2. There is also solar energy or geothermal, because these are renewable resources, they can be used to achieve the purpose of energy saving in the aspect of the building, such as through the principle of solar panels or geothermal heating.

3. In terms of architectural lighting, energy-saving technologies or related products can also be adopted, so as to achieve the effect of energy saving. For example, LED lights installed indoors are a representative of energy saving.

4. In terms of air conditioning, more air conditioners now pay attention to energy saving and environmental performance, which has also led to many domestic brands to launch energy-saving products, which are manifested in air conditioning and refrigeration energy-saving technology and products.

Building energy conservation specifically refers to the implementation of energy-saving standards, the use of energy-saving technologies, processes, equipment, materials and products in the process of planning, design, new construction (reconstruction, expansion), renovation and use of buildings, the use of energy-saving technologies, processes, equipment, materials and products, to improve thermal insulation performance and the efficiency of heating, air conditioning, refrigeration and heating systems, to strengthen the operation and management of building energy systems, and to use renewable energy.

On the premise of ensuring the quality of the indoor thermal environment, increase the thermal resistance of indoor and outdoor energy exchange, so as to reduce the energy consumption of heating systems, air conditioning, refrigeration and heating, lighting, and hot water** due to large heat consumption.

According to the survey of relevant data, the current carbon emissions of industry, transportation and construction can reach 80%-85% of all total carbon emissions, of which the resources and energy consumed by the whole process of the construction industry account for 50% of the total global energy consumption, and the energy consumption of buildings in China accounts for about 28% of the total energy consumption of the whole society, while at the same time, the growth rate of energy production is far less than the growth rate of energy consumption of buildings. In accordance with the requirements of China's national economic and social development program, it is necessary to put the building of a resource-saving and environment-friendly society in a prominent position.

Specific measures for building energy efficiency include the following aspects:

1. Energy conservation of new buildings.

According to the "Design Standard for Energy Efficiency of Residential Buildings in Severe Cold and Cold Areas" (JGJ26-2018) implemented in 2019, the expected energy efficiency level of new residential buildings in China has increased from 30% to 75%. The release of the "Design Standard for Energy Efficiency of Residential Buildings in Temperate Areas" (JGJ475-2019) also fills the gap in the building energy efficiency standards for new residential buildings in temperate regions of China. The building energy efficiency standards in various places have also been improved, standardizing the use of materials and energy-saving equipment in new residential buildings, and promoting the implementation of building energy conservation and emission reduction plans.

2. Energy-saving renovation of existing buildings.

Through the renovation of heating areas and existing residential buildings in the north and the energy-saving transformation of hot summer and cold winter areas, the energy consumption cost of heating and cooling can be effectively reduced, energy efficiency can be improved, and the indoor and outdoor environment can be improved.

3. Improving the energy efficiency of public buildings.

Since the beginning of the new century, public building area has accounted for 30% of the total energy consumption of buildings with 20% of the construction area. Through the energy-saving renovation of public buildings, energy consumption statistics, energy consumption monitoring, energy audit and energy consumption publicity of public buildings, it is expected to achieve 50 million tons of standard coal emission reduction.

Fourth, energy conservation and emission reduction of rural buildings.

The energy consumption of rural buildings is mainly concentrated in the aspects of heating, cooking, domestic hot water, and lighting. In view of the rural energy consumption structure, renewable and clean energy such as solar energy, air thermal energy, and biomass energy have been widely used.

5. Renewable energy building applications.

The application of renewable energy in buildings is divided into two categories, one is the technology that meets the cold and heat needs of buildings such as hot water and air conditioning heating, and the other is renewable energy power generation including solar photovoltaic power generation, thermal power generation, biomass power generation and wind power generation. The former category should focus on energy conservation of energy-using equipment, and the latter category should achieve carbon reduction on the energy supply side.

1. New energy-saving wall and roof insulation technology and materials;

2.energy-saving door and window insulation and sealing technology;

3. Central heating and heat, electricity, cooling, heating and power cogeneration technology;

4. Heating system temperature control and household heat metering technology and device;

5.solar energy, geothermal energy and other renewable energy application technology and equipment;

6.energy-saving technologies and products for architectural lighting;

7.air-conditioning and refrigeration energy-saving technology and products;

8.Other energy-saving technologies and energy-saving management technologies with mature technologies and remarkable effects.

** of construction waste is not included in the construction section.

Extend your data. The overall and external environment design of the building is based on the analysis of the surrounding climatic conditions of the building, through the design of site selection, planning, external environment and shape orientation, so that the building can obtain a good external microclimate environment and achieve the purpose of energy saving.

Reasonable site selection: The location of the building is mainly determined according to the comprehensive conditions such as local climate, soil quality, water quality, topography and surrounding environmental conditions. In the design of the building, it is necessary to maintain a suitable microclimate environment throughout the life cycle of the building, create conditions for the energy saving of the building, and at the same time not destroy the balance of the overall ecological environment.

Reasonable external environment design:

Once the location of the building is determined, its microclimate characteristics are studied. According to the requirements of the building function, through the reasonable external environment design, the existing microclimate environment is improved, and a good environment is created for the energy conservation of the building. The main methods are:

1) Arrange trees and vegetation around the building, which can not only effectively block the wind and sand, purify the air, but also shade the sun and reduce noise;

Create an artificial natural environment, such as setting up a water surface near a building, using water to balance the ambient temperature, reducing wind and sand, collecting rainwater, etc.

1. It can alleviate the tension of energy resources, and building energy conservation is the need of social and economic development;

2. Building energy conservation is the need to reduce air pollution, and building heating and dietary energy are the two main factors that cause air pollution, such as Chongqing is seriously harmed by dust and acid rain, and air pollution is serious;

3. Building energy conservation can protect the ecological environment and improve the quality of the building thermal environment, with the development of modernization and the improvement of people's living standards, a comfortable building thermal environment has increasingly become the need of people's lives;

4. Building energy conservation is the need for the development of the construction industry, and the scope of building energy conservation in China includes the wheel staring belt: energy saving of building wax heating, air conditioning and lighting, and combined with the improvement of building comfort.

<> building energy conservation refers to a series of activities in the production of building materials, the construction and use of roofing buildings and structures, the rational use of energy, as far as possible to reduce energy consumption. The scope and technical content of building energy efficiency is very extensive, and the main scope includes:

1) Wall, roof, ground, thermal insulation technology and products.

2) Doors, windows, curtain walls, sunshades and other ancillary components with building energy-saving effects.

3) Application technologies and products of solar energy, geothermal (cooling) or other biomass energy in building energy-saving projects.

4) Power-saving systems and products that improve heating and ventilation efficiency.

5) Treatment of cold and heat sources for heating, ventilation and air conditioning systems.

6) Use industrial waste to produce energy-saving building materials or components.

7) Power distribution and lighting, monitoring and control energy-saving technologies and products.

8) Other building energy-saving technologies and products, etc.