Variational self-couping regenerative cycle process

Abstract

The invention discloses a variation self-coupling heat regenerative cycle method which includes: using the devices like a heat source, an expansion working device, two current combining devices, two diverters, two couplers, two cold sources, and the like, and the structure elements like pipeline accessories and heat conducting mediums to combine a device with a variation self-coupling structure by the structure steps like the build-up connection and self-coupling connection of the devices; the method achieves the goals of breaking the heat regeneration limitation caused by the existing heat regeneration mode, reducing the internal consumption, increasing the heat regeneration amount and improving the heat-electricity conversion efficiency or the heat-power conversion efficiency by applying the devices and the technology approaches of carrying out coupling circulation according to certain steps by a working substance and a heat conduction medium.

Description

technical field [0001] The invention belongs to the field of thermoelectric technology and thermal machinery, and specifically relates to a variable self-coupling heat recovery cycle method. Background technique [0002] The existing thermoelectric production process is developed on the basis of the Rankine cycle. The pure condensing Rankine cycle process has a thermoelectric conversion rate of about 23%, a cold source loss of about 60%, and a very low thermoelectric conversion efficiency. The existing thermoelectric production process adopts a multi-stage regenerative method to modify the Rankine cycle, and this method can increase the thermoelectric conversion rate by about 18%. Its technical shortcomings are 1: the short-circuit pumping method is adopted, and the improvement of its thermoelectric conversion efficiency is realized at the cost of reducing the expansion and working ability of part of the working fluid; 2: this short-circuit pumping method The method causes...

AI Technical Summary

Problems solved by technology

Its technical shortcomings are 1: the short-circuit pumping method is adopted, and the improvement of its thermoelectric conversion efficiency is realized at the cost of reducing the expansion and working ability of part of the working fluid; 2: this short-circuit pumping method The method causes the structural reheating limit of the system. When this limit is exceeded, the thermoelectric conversion rate of the system drops rapidly, and the working capacity of the system is zero when the pumping rate is 100%.

This way of heating the feed water by increasing the pumping pressure step by step: (1) will inevitably lead to the loss of part of the working capacity of the working medium, thereby increasing the internal friction of the system; (2) making the process structure of the system very complicated, It not only increases the one-time investment of the system but also is not convenient for management and maintenance during operation

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