Parallel configuration power system of expansion machine

Abstract

The parallel configuration power system comprises a main expansion machine, at least one auxiliary expansion machine, an evaporator and an internal combustion engine, wherein the main expansion machine and the at least one auxiliary expansion machine are connected in parallel; a flue gas outlet of the internal combustion engine is communicated with a gas inlet of the evaporator; a working medium outlet of the evaporator is connected with a main expansion machine branch, at least one auxiliary expansion machine branch and a bypass branch. A main expansion machine is arranged on the main expansion machine branch; an auxiliary expansion machine is arranged on each auxiliary expansion machine branch; a bypass valve is arranged on the bypass branch; a working medium outlet of the condenser is communicated with a working medium inlet of the evaporator through a circulating pump; the parallel configuration power system is used for executing a preset working mode. According to the parallel configuration power system of the expansion machine, the problems that in power circulation, a single expansion machine is low in all-working-condition operation efficiency and small in operation working condition range can be solved.

Description

technical field [0001] The invention relates to the technical field of energy utilization, in particular to a parallel configuration power system of an expander. Background technique [0002] The expander is a key work component in power cycles such as the Rankine cycle, and its high-efficiency region of operation is only within a relatively narrow range of operating conditions. However, due to the large-scale fluctuation of user load requirements or heat source conditions, the working conditions of the power system also vary greatly, which leads to the fact that the expander may often work in a working condition with low operating efficiency. [0003] In addition, under too high or too low working conditions, the expander cannot work, which greatly reduces the full working efficiency and operating range of the power system. [0004] Therefore, there is an urgent need to develop a technology that can solve the above technical problems. SUMMARY OF THE INVENTION [0005] T...

AI Technical Summary

Problems solved by technology

However, due to large-scale fluctuations in user load demand or heat source conditions, the working conditions of the power system also vary greatly, which leads to the fact that the expander may often work in a working condition with low operating efficiency

[0003] In addition, under too high or too low working conditions, the expander cannot work, which greatly reduces the full working condition efficiency and operating range of the power system

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