Compared to London 2012 and Rio 2016, Paris 2024 is striving to reduce its carbon footprint by 50 percent in a bid to become the first Olympic Games to meet the Paris Agreement's goal of halving global emissions by 2030.

Duct is a piping system used for air transportation and distribution, usually used in air conditioning system, ventilation system, industrial exhaust system and so on. According to the shape of the cross-section can be divided into round duct, rectangular duct, flat round duct and so on, of which the round duct resistance is the smallest but the height of the largest size, the production is complex. Therefore, the application of rectangular air duct is mainly.

In families with elderly people, due to their relatively poorer health and slower metabolism, they often feel that turning on the air-conditioner continuously at night may cause too much cool air to accumulate in their bodies, which is different from the case of young people. However, the situation is quite different when there are small children at home.

This paper analyzes the causes of vibration for the vibration of the various components of the pump unit. From the pump hydraulic, mechanical structure design, to the pump installation, operation, maintenance and other aspects of several proposed measures to reduce pump vibration.

Summer high temperature and high humidity weather moisture condensation phenomenon is a common problem in the underground garage environment, especially in the rainy season in the south of China, the underground garage moisture condensation is particularly serious, not only for the use of the garage building structure performance and safety of the existence of a huge threat, but also long-term moisture will also affect the interior of the garage aesthetics, but also on the quality of the air inside the garage impact.