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An organic Rankin cycle system was investigated with the purpose of utilizing the waste heat from the asphalt plant’s rotary dryer. The factors that have the impact on the heat source properties by means of combustion and heat transfer were discussed. The ORC system was developed utilizing R245fa as the working fluid, in consideration of the operation conditions of the cycle and its environmentally-friendly characteristics. An evaporator which support phase-change heat transfer was chosen, because most of the energy is in latent heat of the vapour. A radial inflow turbine was selected due to the output power of the system. The operation data of the asphalt plant was taken to evaluate its potential of energy recovery. It can generate 104.4kW electricity when the ORC system is combined with JD3000 asphalt plant. If the electricity is used to the plant itself, 17.1% of electricity power could be saved. The scheme proposed could provide a new solution to the waste heat recovery of the asphalt plant.

Based on the radial basis functions (RBF) and T-Trefftz solution, this paper presents a new meshless method for numerically solving various partial differential equation systems. First, the analog equation method (AEM) is used to convert the original patial differential equation to an equivalent Poisson's equation. Then, the radial basis functions (RBF) are employed to approxiamate the inhomogeneous term, while the homogeneous solution is obtained by linear combination of a set of T-Trefftz solutions. The present scheme, named RBF-Trefftz has the advantage over the fundamental solution (MFS) method due to the use of nonsingular T-Trefftz solution rather than singular fundamental solutions, so it does not require the artificial boundary. The application and efficiency of the proposed method are validated through several examples which include different type of differential equations, such as Laplace equation, Hellmholtz equation, convectin-diffusion equation and time-dependent equation.