Low-temperature waste heat-driven heat and electricity parallel supply method and system implementing same

Abstract

A low-temperature waste heat-driven heat and electricity parallel supply method includes the steps that a gathered heat flow containing low-grade waste heat is divided into two streams and injected into two sub-systems respectively; one stream of the heat flow enters a generator and serves as a heat source of an organic rankie cycle system, and the other stream of the heat flow enters an evaporator and serves as a low-temperature heat source of a heat pump system; the two sub-systems are connected through a transmission device, a part of work of an expansion machine of the organic rankie cycle system drives a compressor to meet the power requirement of a heat pump cycle, the remaining work drives a power generator to generate electricity, and therefore heat and electricity parallel supply of the system is achieved. The invention further discloses a low-temperature waste heat-driven heat and electricity parallel supply system. The system comprises an organic rankie cycle sub-system and a heat pump cycle sub-system. High-temperature recycling of the low-grade waste heat is achieved, extra electricity or fossil fuel consumption is reduced, and heat and electricity parallel supply is achieved at the same time.

Description

technical field [0001] The invention relates to the technical field of waste heat recovery, and relates to a thermoelectric combined supply method driven by low-temperature waste heat and a realization system thereof. Background technique [0002] In recent years, my country's economy has developed rapidly and its energy consumption is huge. At the same time, there are also problems of irrational energy consumption structure and low energy utilization rate. At the same time, the environmental pollution caused by the large consumption of traditional energy is also becoming more and more serious. How to Efficient use of energy and reduction of environmental pollution have become one of the important issues to be solved urgently. [0003] There are a large number of heating processes in human production and life, such as chemical industry, printing and dyeing, textile, papermaking, fiber, leather, ceramic processing and other production processes. A large amount of hot water at...

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Problems solved by technology

These production processes are generally heated by traditional methods such as fossil fuel combustion or electric heating at the cost of consuming high-grade energy, which not only reduces the grade of energy utilization, but also causes a lot of waste of waste heat resources, causing a certain degree of damage to the environment. heat pollution

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