According to the code for acceptance of construction quality of building energy conservation projects and the guidelines for building energy conservation acceptance in various provinces and cities, the materials, equipment and facilities used in energy-saving buildings need to be tested not only for conventional physical performance, but also for thermal performance, which is an important means to ensure the construction quality of energy-saving buildings. The inspection shall be witnessed and submitted by the supervisor as one of the necessary materials for the special acceptance of building energy conservation.
[main contents of energy saving test]
(1) Thermal conductivity of thermal insulation materials such as hollow floor, wall, curtain wall, HVAC and solar hot water system, and heat transfer coefficient or thermal resistance of non-uniform surrounding materials
(2) Heat transfer coefficient of external window (including profile), glass curtain wall (glass part) and door
(3) The visible light transmittance, shading coefficient and dew point of insulating glass of glass (including external doors and windows, skylights and curtain walls), as well as the ultraviolet transmittance of coated glass
(4) Sunlight transmittance and reflectance of transparent and translucent shading materials
(5) Air tightness of external doors and windows and glass curtain wall
(6) Solar radiation absorption coefficient of exterior wall and roof surface
(7) Combustion performance of organic thermal insulation materials
(8) Quality of low voltage distribution power supply
(9) Average illuminance and power density values
(10) Routine performance test of wires and cables
(11) Detection of air volume and air leakage of fan in air conditioning system
[energy saving detection process]
(1) According to the characteristics of the project, formulate energy-saving detection scheme.
(2) Sign the power of attorney for on-site testing, and the sampling quantity and testing parts shall meet the standard requirements and be confirmed by each responsible subject of the project.
(3) The construction unit shall make preparations for on-site inspection as required and notify the inspectors.
(4) After confirming that the preparations meet the testing requirements, our company will arrange testers to arrive at the scene for testing.
(5) Issue test report.
[test items and requirements for building energy conservation]
Serial number
type
Subdivisional works
Test items
Number of tests
remarks
one
Re inspection of materials and equipment
Wall energy saving
Thermal conductivity, density, compressive strength or compressive strength, dimensional stability and compression shear bond strength of thermal insulation materials
For products of the same type from the same manufacturer, when the building area of a single project is 5000m2 or less, sampling shall not be less than once; When the building area of a single project is more than 5000 m2 and less than 15000 M2 (including 15000 m2), take samples at least twice; when the building area of a single project is more than 15000 m2 and less than 20000 m2 (including 20000 m2), take samples at least three times; When the building area of a single project exceeds 20000 m2, the sampling shall be increased once for every 10000 M2 added on the basis of three times.
If the thermal insulation material is the same product, it is not necessary to repeat the inspection
Mechanical properties and corrosion resistance of reinforcing mesh
Bond strength of bonding materials (including crack resistant mortar)
Thermal conductivity, dry density, compressive strength and linear shrinkage of test blocks cured under the same conditions with "two-component" thermal insulation slurry (rubber powder polystyrene particles)
When the construction area of a single project is 5000m2 or less, it shall not be less than once; When the building area of a single project exceeds 5000 m2 and is less than 10000 M2 (including 10000 m2), not less than twice; When the building area of a single project exceeds 10000 m2 and not 20000 m2 (including 20000 m2), not less than three times; When the building area of a single project exceeds 20000 m2, it shall be increased once for every 10000 M2 on the basis of three times. The number of test blocks retained each time shall not be less than 3 groups.
two
Roof energy saving
Thermal conductivity, density, compressive strength or compressive strength of thermal insulation materials
For products of the same type from the same manufacturer, when the roof or ground insulation area of a single project is 1000m2 or less, no less than one group shall be randomly selected; When the roof or ground insulation area of a single project exceeds 1000 m2 and is less than 3000 m2 (including 3000 m2), no less than 2 groups shall be randomly selected; When the roof area of a single project exceeds 3000 m2, no less than 3 groups shall be sampled.
three
Ground energy saving
Thermal conductivity, density, compressive strength or compressive strength, dimensional stability and compression shear bond strength of thermal insulation materials
four
Energy saving of doors and windows
Air tightness, water tightness, wind pressure resistance, heat transfer coefficient, hollow glass dew point, glass shading coefficient, visible light transmittance
No less than 3 pieces of products of the same variety from the same manufacturer shall be sampled
five
Curtain wall energy saving
Thermal insulation material: thermal conductivity, density
At least one group of products of the same variety from the same manufacturer shall be randomly selected
Curtain wall glass: heat transfer coefficient, hollow glass dew point, glass shading coefficient, visible light transmittance
Thermal insulation profile: tensile strength and shear strength
Air tightness (materials and accessories extracted on site, laboratory testing)
When the curtain wall area is greater than 3000 m2 or 50% of the building exterior wall area, one test piece shall be taken for each kind of behind the scenes wall with an area of more than 1000 m2 in the unit project
six
Field pull-out test
Wall energy saving
Bond strength between insulation board and base course (pull-out test)
See the table below for details
The anchorage of the post anchor fixing the wall insulation layer is the pull-out test
Field pull-out test of bonding strength between plastering layer and insulation layer of thin plastering layer
Bond strength of exterior wall external thermal insulation facing brick
seven
On site physical inspection
Enclosure structure
Energy saving structure of exterior wall - type of thermal insulation material, thickness of thermal insulation layer and construction method
The spot check of each energy-saving method of the exterior wall of each single project shall be no less than 3 places, with one inspection point at each place. (villas can be tested by batch)
Air tightness of external window
The spot check of external windows of each single project shall not be less than 3
eight
Re inspection of materials and equipment
Ventilation and air conditioning energy saving
Thermal conductivity, density and water absorption of thermal insulation materials
The re inspection times of thermal insulation materials of the same manufacturer and material shall not be less than 2 times
If the thermal insulation material is the same product, it is not necessary to repeat the inspection
nine
Cold and heat sources of air conditioning and heating system and energy saving of pipe network
1. All kinds of test items are submitted for inspection by witness sampling, that is, sampling shall be carried out under the witness of the supervisor (construction) personnel, and the construction unit shall entrust a qualified testing organization to implement.
2. All kinds of testing items shall be provided with photographic materials for important links in the testing process. The inspection report shall be attached with image data of typical damaged interface.
3. If the test results of on-site test items cannot meet the standard requirements, the following provisions shall be followed:
1) If the on-site air tightness test of building external windows cannot meet the standard requirements, the construction party must report the rectification scheme and results to the supervision station for filing. After the rectification is completed, the supervisor (or construction) and the construction parties shall jointly determine the same number of building external window samples for retest. If the retest results meet the above requirements, it is evaluated as meeting the design or standard requirements.
2) If the test results of other items cannot meet the standard requirements, double samples shall be taken again for retest. If the retest results meet the standard requirements, it is evaluated as meeting the design or standard requirements.
3) If the retest results still fail to meet the standard requirements, the design, construction, supervision and construction parties shall jointly agree on the treatment methods and report to the supervision station for the record.
4. Each construction team of exterior wall external insulation works shall make a template first, and the template area shall be ≥ 30m2; After all kinds of pull-out tests of the samples are qualified, the external insulation construction of the external wall can be carried out; After the construction of each layer of external insulation is completed, the corresponding pull-out test shall be carried out as required; If the construction or construction unit applies according to the special needs of the project progress, it can also carry out various pull-out tests after the completion of the external wall insulation and surface course.
5. For public buildings with a building area of ≤ 1000 m2, if the construction unit applies, the inspection items of materials and equipment re inspection: energy saving of doors and windows can only be tested for air tightness, water tightness and wind pressure resistance, and others shall be tested according to the re inspection requirements of materials and equipment mentioned above; For the on-site physical inspection of the enclosure structure, only the external wall energy-saving structure test can be carried out, or the on-site pull-out test can not be carried out.
6. For projects such as excellent projects and energy-saving demonstration projects, they shall be tested according to the building energy-saving testing items and requirements specified in national standards and specifications.
[basis]
Code for acceptance of construction quality of building energy efficiency projects and guidelines for acceptance of building energy efficiency in provinces, cities and regions
Advantages of our company:
(1) Engaged in building energy-saving acceptance service for a long time, familiar with key links and projects of energy-saving detection;
(2) Professional testing team and partners;
(3) Analyze the test data to ensure that the test data meet the acceptance requirements.
