Aihua Ma

Environment and Energy Challenge of Air Conditioner in China

China has been one of the worlds largest producers and consumers of air conditioners. Air conditioners meet the demands for human comfort, but they cause serious problems, such as stratospheric ozone depletion, global warming, power failure, electricity demand peak and simplification of energy consumption structure. All problems are analysized. The future studies on development of air conditioners are discussed.

Simulation of Critical Flux through Adiabatic Capillary Tubes Based on Artificial Neural Network

Evaluating the critical flux in capillary tubes is the key to the research on flow characteristics in capillary tubes. The mathematical model of refrigerant flow through the capillary tubes was presented. The numerical solutions were obtained based on the program made. Data derived from capillary tube theoretical models were used as example collection to train the back propaganda(BP)network model in order to evaluate the critical flux through capillary tubes. The results are satisfactory. Compared with finite difference numerical computation method, the computation of the critical flux based on neural network is more useful to engineering design of capillary tubes.