93 pages of mechanical and electrical professional design and construction defect feedback, combined with pictures and texts, explain in detail
93 pages of mechanical and electrical professional design and construction defect feedback, includes interior design parameters, energy systems, fresh air systems , kitchen odor, terminal and water systems, etc. 10 kinds of defect feedback and best cases, combined with pictures and texts, detailed explanations, essential for mechanical and electrical installation, is very worth learning and learning from!
Catalog
Interior design parameter defect feedback
[Problem description] The first-floor floor heating system uses secondary water, and the water temperature is low, resulting in low indoor temperature.
[Cause analysis] has a larger cooling load on the first floor. The effect of secondary water auxiliary heating in the floor heating system is not obvious.
[Rectification Suggestions and Standards] recommends that the first-floor heating issue be considered in advance during design, and the first-floor floor heating system be designed as a primary water system.
Energy system defect feedback
[Problem description] The air conditioning system did not consider setting up auxiliary cold and heat sources
[Cause analysis 】 The value of heat transfer coefficient is slightly higher during the thermal response test. In actual use, due to factors such as cold fatigue and ground source well formation rate, the heat release from the ground source side cannot reach the design value. Because the system is not designed with an auxiliary heat source, it cannot effectively alleviate the cold fatigue on the ground source side. In extreme weather conditions in winter, the indoor temperature will not meet the standard. Current solution: Auxiliary hot and cold sources are being added.
[Recommendations and standards for rectification] (1) The ground source well is an irreversible project, and management must be strengthened during the construction stage; (2) During the program design stage, possible situations that may occur in the future must be anticipated and reasonable auxiliary cold and heat sources must be configured.
Fresh air system defect feedback
[Problem description] 1. The fresh air shaft and exhaust shaft are close to each other, causing a short circuit. Affect the quality of fresh air. 2. The height of the fresh air outlet from the ground does not meet the specification requirements. Affect the quality of fresh air.
[Cause Analysis] During the house design stage, the design was not carried out in accordance with national regulations.
[Recommendations and standards for rectification] was designed in accordance with the "GB50736-2012 Design Code for Heating, Ventilation and Air Conditioning for Civil Buildings" in the early design of the main structure. (Separate the new air shaft and the exhaust shaft at a distance of not less than 10M. The distance between the lower edge of the air inlet and the outdoor floor should not be less than 2 meters. When it is located in a green belt, it should not be less than 1 meter.)
Kitchen odor defect feedback
[Construction improvement standards] 1. The joints of the upper and lower flues must be set more than 200mm above the indoor finished surface; 2. The joints of the flues should be sealed with self-adhesive tin foil paper; 3. The root of the flue should be made of concrete guide wall, with a height of 300mm above the indoor finished surface.
[Improvement and Optimization Suggestions] 1. It is recommended that after the entire unit completes the installation of the air duct and seals the bathroom door and window glass, conduct a flue tightness test and inspect it floor by floor and house by house. 2. It is recommended to consider the thickness and height of the concrete guide wall at the root of the flue when designing the fine decoration, and reserve construction space.
terminal and water system defect feedback
[Problem description] The water quality is poor, causing system corrosion and scaling.
[Cause analysis] has no water treatment equipment or water softening equipment on the primary side.
[Rectification suggestions and standards] recommends adding water softening equipment and cooling water dosing treatment equipment during design to ensure that softened water can be used, and the cooling water has the conditions for dosing treatment. How to get the full version of
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