This study investigates the performances of five low GWP (Global Warming Potential) refrigerant/[P6,6,6,14][Cl] working pairs in the compression-assisted single-effect absorption system. The studied refrigerants include hydrocarbon (HC) R290 and R600a, hydrofluoro-olefin (HFO) R1234yf, R1234ze(E), and R1233zd(E). The NRTL model was utilized to correlate the vapor-liquid equilibrium data of five working pairs, and the performance improvement of th...

Latent heat storage (LHS) technology can solve the time-space non-continuity in the transfer of thermal energy, which can effectively reduce heat loss and accelerate the realization of China's carbon neutrality goal. However, the LHS system in practical applications needs to be equipped with heat transfer enhancement devices, considering the low thermal conductivity of phase change materials (PCMs), which significantly increases the system comple...

When selecting the type of pressure-drop distributor for air conditioners with good distribution performance, the divergence of the distribution uniformity among the existing types of pressure-drop distributors should be checked. In this study, an experimental rig for testing the distribution homogeneity of distributors was designed and established. Thereafter, the distribution unevenness of existing reflection-type, jet loop-type, Venturi-type, ...

The low-grade waste heat resources of industrial buildings are abundant but difficult to utilize, especially when the waste heat is below 80 ℃. The effective recovery and utilization of such waste heat are of great importance for energy conservation and environmental protection. In this study, a low-grade heat-driven dehumidification and cooling air-conditioning system for industrial buildings is proposed. The hot water drives the chiller first a...

A significant amount of unlabeled data are idle when labeled data with known operating statuses are used in the fault diagnosis of conventional refrigeration systems. Therefore, a semi-supervised fault diagnosis method is proposed in this study for refrigeration systems based on the Tri-Training method, which uses the information in unlabeled data to improve fault diagnosis performance. Seven typical faults in a 316 kW centrifugal chiller are use...

Thermal management technology for electric vehicles guarantees safety and comfort of driving, and it is one of the key technologies in the development of electric vehicles. The research progress and development trends of thermal management technology were introduced considering the thermal management demand, development history, and key components. Trends and prospects of the future technological development of thermal management in electric vehi...