Narrow Results

Thermal-assisted machining (TAM) is an effective processing solution to improve productivity and product quality made from materials with high strength and hardness. This method is widely used in nonchip machining such as forging, stamping, deep drawing, etc. For the method of heating on the molds, it is possible to control local heat or uniform heat on the workpiece. However, the calculation of heat capacity, heat transfer as well as the heating time to achieve the temperature on the workpiece is necessary to design suitable molds and heating system. This study focuses on a heating system that uses single-sided thermostatic heating rods to heat the molds, verify the effect of the heating time on the temperature of the workpieces and then control the temperature on the workpieces at various heat levels through a heating control system. Thereby, this study proposes to build a mathematical model between temperature and heating time on the workpiece.

Utilizing multi energy sources synthetically and efficiently is one of the trends of energy systems in recent years. An air source heat pump heating system based on the photovoltaic power supply is proposed in this paper, and further research is done on it. As a high efficiency and energy saving environmental protection equipment, air source heat pump can not only alleviate the pressure of the energy demand, but also provide effective solutions for winter heating. We put forward theoretical model and practical model schemes for a certain office building’s air source heat pump heating system, and carried out the simulation of air source heat pump heating system based on photovoltaic power. Quantitative data of the whole heating season, such as the indoor air temperature, heat storage water tank’s water temperature, and the system power consumption, was obtained. Analysis results shows that the economic benefits of air source heat pump heating system is superior to the traditional central heating system.