Ventilation and air-conditioning project with other specialized projects with more, high technology, in order to achieve the desired control objectives, we must grasp the design, construction and operation and management of each link in the implementation process. Through various types of projects in office buildings, hospitals, art museums and other types of ventilation and air conditioning project supervision, to talk about their own experience, for your reference. 1.1 Supervision engineers in the acceptance of the owner entrusted, should check the drawings, communicate with the owner, as soon as possible to understand the owner's intention to build, in detail, to figure out the purpose of each room and the use of characteristics. Such as the Ningbo traffic police command center project, the designer according to the general office building design air conditioning, the main building and auxiliary building air conditioning from the roof of the four 662.5KW air-cooled heat pump unit to provide. After communicating with the owner of the use of
departmental communication found that the original design has not been well thought out. For example, the air conditioning of the command center requires constant temperature and humidity, the UPS room requires air conditioning throughout the year, while the auxiliary building is mainly a cafeteria that requires air conditioning, and the use of a short period of time. So we assisted the owner to propose to the designer that the UPS room adopt split-type air conditioning alone, the computer room install constant temperature and humidity air conditioning, and the cafeteria in the auxiliary building install VRV system air conditioning, and the air-cooled heat pump unit was changed from four to three. The designers considered our proposal reasonable and adopted it. This can be both flexible operation, suitable for special equipment room conditions, but also can reduce consumption, lower operating costs.
1.2 Check whether the design drawings comply with the provisions of the code, technical standards. Some designers are not familiar with the construction quality acceptance norms, such as fire partition wall on both sides of the fire damper, the design is often only a single side of the fire damper; air-conditioning supply and return trunk length of more than 25m should be set up expansion devices.
1.3 Check the design notes in the drawings. Some designers do not understand the local geography. Such as the design of the north will often basement exhaust smoke duct material using galvanized steel, and Ningbo belongs to the coastal areas, high air humidity, and high salt content in the air, exhaust smoke duct does not require insulation, using bare galvanized steel duct corrosion easily. When encountering this situation, we should explain to the designer and ask him to choose another suitable material. Check the plan, system diagrams, section diagrams are contradictory to each other, while combining civil, electrical, fire, water supply and drainage, intelligent and other related professional design, often found in the design of the professional did not communicate, resulting in the superposition of various types of local professional pipelines, can not be constructed. Therefore, in the drawings before the handover to find out this aspect of the problem, to facilitate the handover of drawings to solve such problems.
1.4 Review of equipment selection and supporting the rationality. Design often pay more attention to the reliability of equipment operation, and lack of economic considerations, resulting in a large margin of equipment selection, so try to review the cooling (heating) amount of each region to avoid oversizing. Therefore, the need to determine the technical parameters of the equipment process, equipment selection should be fully investigated before the study, in particular, attention should be paid to visit similar users have been put into operation, so that the equipment to meet the conformity, reliability and economy, for the owners of the selected equipment as a good adviser.
1.5 View and civil engineering, water and electricity, fire, intelligence and other related professional cooperation. Some air conditioning with electric control valves, and intelligent professional no air conditioning automatic control system, this issue needs to be carefully viewed to avoid errors, omissions, touch, lack of, to ensure that the drawings can be operated. Because this aspect is also an important factor in causing construction conflicts and increasing investment. 2.1 Strictly review the construction organization design, to focus on the review of its selection of specifications, technical standards, atlas is in line with the design requirements. Some construction units do not pay attention to the construction organization design, will be copied and applied to the organization design of other projects, the supervision should be strictly audited. The key control points, the construction unit is required to prepare a special construction program, whether the construction schedule to meet the overall progress plan, whether the arrangement is scientific and reasonable, whether the material field plan and labor deployment plan to meet the requirements of the construction schedule, whether the process inspection procedures are in line with the provisions of the management personnel and the special types of work license is valid.
2.2 Strict inspection of incoming engineering materials and equipment, qualified and fulfill the procedures before use.
(1 ) of the incoming piping materials, must check its factory certificate of conformity, pipe and fittings should be uniform thickness inside and outside the pipe wall, smooth inside and outside the wall, uniform color.
(2 ) The incoming valves must have factory certificates, specifications, models, materials in line with the design requirements, and according to the specification requirements to do the pressure test and air tightness test.
(3 ) of the incoming equipment, such as refrigeration equipment, air conditioning equipment, pump equipment, should be organized by the owner, the construction unit **** with acceptance.
3.1 Decorative design and construction process, the owner of the decorative requirements are often changing ideas, decorative companies are often one-sided pursuit of decorative effects and casually change the original design of ventilation and air conditioning. The result is to destroy the rationality of the original design, affecting the use of ventilation and air conditioning function, or because of the violation of the relevant design and construction norms to the use of safety buried hidden dangers. Supervision engineers should verify whether the decorative design to change the use of the room, the layout, decorative design drawings marked with the ventilation and air conditioning construction drawings of the relevant location is consistent, air-conditioning design of the airflow organization is not unreasonable because of the decorative design is blocked. If indeed due to the need for decorative works, ventilation and air conditioning works need to be changed locally, should be organized in advance with ventilation and air conditioning designers to participate in the engineering coordination meeting to determine the content of the changes and solutions, and ventilation and air conditioning designers to issue the appropriate design change documents.
3.2 For the decoration project is hidden by the ventilation and air conditioning installation part and a variety of functional tests should be timely and carefully checked, especially to strengthen the air conditioning supply and return pipeline insulation, air conditioning duct insulation quality inspection. Sometimes due to multiple types of construction at the same time, cross operation, resulting in frequent damage to the insulation, including pipe brackets, pipes through the wall, floor and other easily overlooked places. To achieve continuous insulation without omission, the insulation layer is firm and not cracked, in order to prevent the generation of condensate dripping affect the quality of decoration. 4.1 Supervisors in the commissioning stage should first review the installation unit commissioning program and commissioning plan. Civil building ventilation and air conditioning project commissioning is generally divided into equipment stand-alone test run and comprehensive performance debugging.
4.2 equipment stand-alone commissioning supervision engineers quality control is mainly to check the operating conditions of the equipment, the determination of the relevant parameters of the equipment operation, major equipment such as refrigeration equipment may be commissioned by the manufacturer of stand-alone commissioning. Supervision engineers should be in the stand-alone test run stage to ensure the authenticity of the parameter records, the accuracy of the data analysis, for the future comprehensive performance debugging to lay a good foundation.
4.3 In the integrated performance commissioning, the supervising engineer quality control should do the following:
(1 ) Check that the system piping should be installed, the valve should be adjusted to the appropriate position, whether the machine room is clean and sanitary.
(2 ) The equipment can be operated normally after single machine test run, and the measurement data is complete.
(3 ) Electrical control operations have been completed, B A S system, etc. have been installed and commissioned.
(4 ) in the beginning of the commissioning operation, the test items should be carefully observed, to obtain first-hand information, and timely adjustments to meet the design requirements.
(5) After the end of the commissioning, to urge the construction unit to fill out the appropriate information, as an important basis for future formal operation. After the completion of the debugging of the equipment integrated performance, supervision engineers should urge the construction unit to the user operator training, and require the construction unit to prepare a user manual for the user's future operation, maintenance, overhaul to provide convenience. I experience, in the supervision activities, as long as to strengthen the pre-control and organization and coordination as the main means of quality control in every aspect of the implementation of the project, will achieve the desired objectives of the design.