What does the evaluation of building energy efficiency include?

Building energy efficiency evaluation and energy efficiency labeling are effective guarantees to promote building energy efficiency, and developed countries such as Europe and America have established corresponding perfect technical standards and labeling systems. The evaluation institution shall be determined by the administrative department of construction. Its function lies in: it can clearly display the energy consumption of the building; Become a booster for building energy conservation; Play a regulatory role for developers; In particular, it can be used as the basis for implementing economic incentive policies for building energy conservation. 1. Building energy-saving consultation: Building energy-saving consultation mainly provides professional knowledge for architects or owners who have just entered the field of building energy-saving. The main business scope is: with information technology and computer simulation as the main means, from the perspectives of building energy consumption, microclimate, airflow, air quality, acoustics, optics, etc., comprehensive energy-saving evaluation is carried out on the design scheme of new buildings, and preliminary effect analysis is carried out on the energy-saving renovation scheme of existing buildings. 1, the analysis of building energy consumption simulation technology is the energy consumption of building heating and air conditioning equipment under different architectural design schemes under the influence of local climatic conditions and outdoor meteorological parameters. Because energy consumption is directly linked to economic benefits, building energy consumption simulation analysis technology can choose the thermal scheme of envelope structure that is most suitable for local climate from the technical and economic point of view. The energy consumption analysis software Doe-2 recommended by the US Department of Energy and the thermal environment simulation software DeST developed by Tsinghua University, China can accurately simulate the load of the envelope. 2. Using computational fluid dynamics (CFD) technology to simulate the wind environment of residential quarters or apartments, and find out the distribution law of thermal environment and wind environment in various areas of residential quarters or apartments, so as to provide technical basis for the planning of residential quarters and apartment design. PHOENIX, an environmental analysis software developed by Imperial University of England, has powerful functions and open interfaces, and is widely praised by scientific research units, enterprises and other customers. It is the main tool for environmental analysis of the company. 3. Simulate and predict the lighting and sunshine of the building in the design scheme through the building light environment analysis software, and put forward improvement suggestions, so as to facilitate the more reasonable layout of the building and meet the requirements of natural lighting in residential areas. Mainly use Helios (Australia) and Tsinghua University's building sunshine analysis software to complete the design and analysis of light environment. Second, the energy-saving scheme design company will provide energy-saving scheme design for customers in need. For new buildings, building energy-saving professionals will participate in the design of building schemes, so that the design scheme can reduce energy consumption, improve energy efficiency and meet the requirements of building energy conservation through technical means on the premise of meeting reasonable comfort requirements. At the same time, on the basis of computer simulation and energy consumption quantification, we will determine whether the effect of adopting energy-saving technologies and measures is significant, and further calculate the initial investment payback period to ensure the feasibility of energy-saving schemes. The design and transformation of building energy efficiency mainly includes the following aspects: 1. Environmental design: by adjusting environmental indicators, such as greening rate, hardened pavement distribution, road shading technology, etc., reduce the heat island effect and reduce the energy consumption caused by existing building environmental problems; 2. Envelope design: According to the present situation of existing envelope structures such as roofs, walls and windows, the corresponding transformation schemes are studied from the aspects of heat preservation, heat insulation and sun shading; 3. Equipment system design: improve the energy efficiency ratio of air conditioning equipment and systems, lighting equipment and systems; 4. Renewable energy utilization: solar energy, wind energy, geothermal energy and other renewable energy utilization; Building energy-saving design needs the idea of system optimization, and the optimal scheme should be the energy-saving scheme with the lowest social cost, high energy efficiency and satisfying demand. Therefore, the company can design energy-saving renovation of new buildings or existing buildings according to the needs of owners. For each project, we will put forward several optimization schemes for comparison, accurately evaluate the energy-saving effect and investment amount of each scheme after transformation, and choose the best scheme on the basis of comprehensive consideration. Three. Energy-saving detection and evaluation company has many internationally advanced field detection and laboratory detection instruments for building energy saving, such as field detector for heat transfer coefficient of building envelope, thermal conductivity detector, infrared thermal image detector, spectrophotometer and so on. Ability to detect thermal insulation defects and energy consumption of buildings. On-site detection of building energy-saving performance includes energy-saving performance detection of building envelope and system function detection: 1. The main items of energy-saving performance test of building envelope include: determination of heat transfer coefficient and thermal insulation performance of wall and roof; Determination of air tightness of curtain wall; Determination of air tightness and heat transfer coefficient of external window and items agreed in engineering contract. 2. The main items of functional inspection of heating, air conditioning, equipment, power distribution, lighting and monitoring system include: heat exchanger efficiency; Hydraulic balance rate of outdoor pipe network of heating system; Transportation efficiency or loss of cold and hot pipe network; Water supply rate of cold and hot water supply system; Cooling and heating power consumption of circulating water pump unit; Energy efficiency ratio of water chillers; Power consumption per unit air volume of fan; The external surface temperature of heat insulation air duct and hot and cold water pipeline; Average illuminance and lighting power density, etc. According to the actual test data, combined with the building energy-saving design standards, evaluate whether the building meets the energy-saving requirements. That is, to evaluate whether the comprehensive index of the building at this stage meets the energy-saving design standards required by the state or region.