Low ebb electricity and waste heat recovering, storing and recycling system of internal combustion engine generator

Abstract

The invention discloses a low ebb electricity and waste heat recovering, storing and recycling system of an internal combustion engine generator. The low ebb electricity and waste heat recovering, storing and recycling system comprises the internal combustion engine generator, an air compressing device, a waste heat recovering device, an air heat exchanging device and an expansion machine, wherein the air compressing device is used for recovering and storing low ebb electricity in a mode of compressed air when electricity utilization is in a low ebb; the waste heat recovering device is used for recovering and storing waste heat generated by the generator and the compressing device in the work process; and when needed, with the adoption of the air heat exchanging device, the compressed air released from the air compressing device can absorb heat in the waste heat recovering device and enter the expansion machine to do work. The invention also discloses a low ebb electricity and waste heat recovering, storing and recycling method of the internal combustion engine generator. According to the low ebb electricity and waste heat recovering, storing and recycling system, waste heat recovering and low ebb electricity storing are combined to be used in generating technology, therefore, the energy utilization efficiency of the internal combustion engine generator is effectively improved, in addition, the utilization patterns of the waste heat are broadened, and the effect of peak shaving is acted on the internal combustion engine generator.

Description

technical field [0001] The invention relates to a low-valley power and waste heat recovery, storage and reuse system of an internal combustion generator, in particular to a diesel generator waste heat and low-valley power recovery, storage and utilization, and a peak-shaving system. Background technique [0002] Internal combustion generators are used more and more widely as a supplement to power demand during peak periods of electricity consumption and as a main source of backup power for enterprises and institutions. Internal combustion generators include fuel generators and gas generators, and fuel generators can include Diesel generators, gasoline generators, etc., diesel generators are currently the most widely used. At present, for power generation systems that use diesel as fuel, only about 35% of the fuel energy is converted into electrical energy by the generator, and the other 30% and 25% of the energy are taken away by the exhaust gas and generator cooling water r...

AI Technical Summary

Problems solved by technology

Another problem with the existing waste heat utilization methods is that the waste heat utilization efficiency is low.

At present, there are many means of waste heat recovery for internal combustion generators, and a variety of corresponding uses have been designed, but the recovery rate of these means is generally not high, especially the waste heat taken away by cooling water, and there is almost no corresponding recovery plan

The main reason is that the current waste heat recovery scheme of diesel engines does not carry out graded recycling according to the grade of waste heat, resulting in unreasonable waste heat recovery scheme and low waste heat recovery rate; most of the recovered waste heat is used for heating and heating. Or replace the refrigerant water with a lithium bromide chiller to form an operation mode of cogeneration of cold, heat, and electricity. Although part of the available energy in the waste heat is recovered, it is difficult to control the amount of heat energy generated and used, and the production end of waste heat and heat The user is two relatively independent parts, which causes the heat utilization equipment to be in an unstable operation state, and the overall efficiency is low, which also greatly limits the promotion of various waste heat recovery and utilization technologies

[0003] In addition, during the working process of the generator, no-load or low power consumption often occurs, and its fuel consumption per unit power increases, resulting in waste of fuel and environmental pollution. When the peak power consumption is greater than the rated power of the internal combustion generator, the generator cannot Meet system requirements

For this problem, although energy storage battery technology can play a certain role in peak regulation, it is difficult to be widely used in internal combustion engine power generation systems due to the limitations of its use cost and efficiency.

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