According to the water pressure characteristics, can be divided into open system and closed system.
According to the cold and hot water piping, can be divided into two-control system, three-control system and four-control system.
According to the water flow of each terminal equipment, can be divided into the same program and different program system.
According to the characteristics of water, can be divided into fixed water system and variable water system.
According to the nature of water, can be divided into chilled water system, cooling water system and hot water system.

A total of 14 right-handed male subjects were recruited for the study, with age (21.6±1.8) years, height (173.1±6.4) cm, body mass (64.8±5.5) kg, and body mass index (21.6±1.2) kg/m2. A thorough physical examination was performed before the trial to exclude subjects with cardiovascular disease or hidden mental disorders. A training session was conducted before the trial to enable the subjects to better understand the content of the trial, especially the operation of the cognitive tasks. Subjects were not allowed to drink alcohol, consume caffeine, or take medication during the test. Strenuous exercise was not allowed the day before each test. All subjects participated voluntarily and were paid by the hour. Also all subjects carefully read and signed the informed consent form before the test. The study was ethically reviewed.

Numerous case studies have shown that savings of 20% or more can be achieved through better system design and optimization of existing systems, and have also pointed to larger but often overlooked opportunities for energy savings. Applying a systems approach to optimize the pumping system by the most appropriate means, based on a thorough testing and analysis of the system, can result in energy savings of 30-50%.

During 2nd-5th May, CLIMASUN & Haier attend 2024 Exhibition TEKTÓNICA in Lisbon, Portugal.

With the increasing awareness of environmental protection and the deepening energy crisis, new energy electric vehicles have become a hot spot of concern at home and abroad. As the main development direction of electric vehicles, lithium batteries are highly favored for their high energy density, long life, low self-discharge and other advantages. However, with the increase of battery energy density and the development of higher power charging technology, the risk of thermal runaway of power lithium-ion batteries is gradually increasing. Studies have shown that at extreme temperatures (both high and low), lithium-ion batteries are prone to thermal runaway, and generate a large amount of heat and buildup during the charging and discharging process, which can affect their service life and may lead to explosions or fire accidents. Therefore, Battery Thermal Management System (BTMS), as a key technology to prevent overheating of Li-ion batteries, has been highly emphasized in academia and industry.

From April 18th to 19th, "2024 Electrical Field Proficiency Verification and Testing Technology Exchange Activity and 2024 Academic Activity of Electronic and Electrical Appliances Branch of China Society for Testing and Inspection" organized by China Household Electric Appliances Research Institute (CHERI) was held in Beijing. At this event, the China Society of Testing and Inspection unveiled the results of the "Second Quality Control Pioneer Evaluation of Electrical and Electronic Laboratories", and TCL Air Conditioning Test Center was awarded the "Quality Control Pioneer Honor Award" for electrical and electronic laboratories.