Medium and low temperature waste heat sliding power generation device based on shape memory alloy

Abstract

The invention discloses a medium-low temperature waste heat sliding power generator based on shape memory alloy. The medium-low temperature waste heat sliding power generator comprises a trapezoid bracket located in a magnetic field. A sliding block is connected into the trapezoid bracket. The top end of the sliding block is connected with the top of the trapezoid bracket by a spring. Two sides ofthe sliding block are connected with guide rods fixed to the left and right sides of the trapezoid bracket by SAM springs respectively. Wires are arranged on the front and rear ends of the sliding block in a winding mode. Electric brushes are connected to the corners of the top of the sliding block. The electric brushes penetrate through wire holes formed in the top of the trapezoid bracket. A heat source is arranged below the sliding block. The structure is simple, installation is convenient, the cost of the device is low, and economic benefits are high. When the device is positioned in themagnetic field, the medium-low heat can be fully used, and waste heat power generating efficiency is improved. Universality is high, and limitation on application places is low. The device can collectlarge heat sources of factory waste pipes or small heat sources of domestic exhausting pipes after appropriate size modification. Application and maintenance are simple, and energy supplying except the heat source to be collected is not required.

Description

technical field [0001] The invention relates to a power generation device, in particular to a medium-low temperature waste heat sliding power generation device based on a shape memory alloy. Background technique [0002] Waste heat power generation technology is a technology that recovers waste heat and generates electricity through a thermoelectric conversion device. Since the higher the temperature of waste heat, the easier it is to realize heat recovery, and the higher the efficiency of waste heat utilization, so the current high-temperature waste heat recovery power generation technology is developing rapidly. However, the recovery of medium and low temperature waste heat is still in the experimental stage, and the application effect is not ideal. Shape memory alloy (SMA) is more sensitive to temperature perception, can show good shape memory effect at medium and low temperature, and has the advantages of large phase change driving force, good fatigue resistance, corros...

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Problems solved by technology

[0003] In recent years, the organic Rankine cycle and the Calina cycle have been widely used in waste heat recovery. However, such devices generally use heat pump systems to generate electricity, which has problems such as complex device structure, large space occupied by equipment, poor universality of the device, and high power generation costs.

Thermoelectric power generation element power generation is a power generation technology that has been gradually promoted in recent years. However, due to the large thermal resistance coefficient of the hot and cold ends of the thermoelectric power generation sheet, the heat exchange is insufficient, resulting in low output power, low power generation efficiency, and low thermal efficiency. Some existing inventions and products lead to low economic benefits of equipment

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