Lin Rumou

Design of the First Chinese 1 MW Solar-Power Tower Demonstration Plant

This article presents thermodynamic performance of a solar-power tower plant, DAHAN, which is constructed in Beijing as the first Chinese solar-power tower demonstration plant. Different from the existing solar-power tower plant, the DAHAN configuration includes a two-stage thermal-energy storage system consisting of a high-temperature oil accumulator and a low-temperature steam accumulator. The sensible heat and latent heat of steam are stored in the high- and low-temperature accumulators, respectively. The new plant is designed in such a way that during the operation the receiver can be connected to a steam turbine or energy-storage system. Software that simulates the performance of the plant has been developed and the thermodynamic performance of the plant was investigated. The results show that the annual thermal efficiency from solar to power of the plant can reach 8.35%. The annual efficiency of plant can be increased by 0.65 percentage points at the optimal condition. The results provide a better understanding for the design and operation of solar-power tower plant.

A new approach of cascade utilization of the chemical energy of fuel

Abstract The indirect release of chemical energy of fuel is investigated, and a new machine is proposed to identify the cascade utilization of chemical energy of fuel more clearly. Based on the concept of energy level, the internal phenomenon of the indirect chemical energy release is disclosed, and the equations of energy level describing the utilization of chemical energy and thermal energy during the indirect chemical energy release process are obtained. From theoretical analysis, we find that the superiority of the indirect chemical energy release of fuel comes from the cascade utilization of the fuels chemical energy. Moreover, the cascade utilization of chemical energy is verified by the investigation of CRGT(chemically recuperated gas turbine). As a result, the thermal exergy obtained from the chemical energy release of fuel increases by 2%-3%. The results obtained here may help a deeper understanding of indirect chemical energy release of fuel and provide a theoretical basis for the synthesis of ...