Generating Device Based on Theory of Semiconductor Thermoelectric Generation

2013 ◽  
Vol 722 ◽  
pp. 292-295
Author(s):  
Kun Li ◽  
Han He
Keyword(s):  
Low Temperature ◽  
Energy Conversion ◽  
Output Power ◽  
Temperature Difference ◽  
Thermoelectric Generator ◽  
Thermoelectric Generation ◽  
Performance Parameters ◽  
Thermoelectric Conversion ◽  
Made In

The semiconductor thermoelectric generator is a thermoelectric conversion device and is produced according to See back effect of the semiconductor. As a special energy conversion way, its advantages are obvious, with significant recycling effects of low temperature difference energy. A semiconductor thermoelectric generating device is made in accordance with the above theory. The performance parameters including the output power of the generating device are measured through experiments.

Achieving high room-temperature thermoelectric performance in cubic AgCuTe

2020 ◽  
Vol 8 (9) ◽  
pp. 4790-4799 ◽  
Author(s):  
Jing Jiang ◽  
Hangtian Zhu ◽  
Yi Niu ◽  
Qing Zhu ◽  
Shaowei Song ◽  
...  
Keyword(s):  
Low Temperature ◽  
Conversion Efficiency ◽  
Temperature Difference ◽  
Room Temperature ◽  
Thermoelectric Performance ◽  
Thermoelectric Conversion

Average ZT of near unity provides a competitive thermoelectric conversion efficiency of ∼12% at low temperature difference of 400 K.

Heat Sink Matching for Thermoelectric Generator

2011 ◽  
Vol 383-390 ◽  
pp. 6122-6127 ◽  
Author(s):  
Ze Guang Zhou ◽  
Dong Sheng Zhu ◽  
Yin Sheng Huang ◽  
Chan Wang
Keyword(s):  
Numerical Calculation ◽  
Heat Source ◽  
Thermal Resistance ◽  
Output Power ◽  
Analytical Model ◽  
Temperature Difference ◽  
Heat Sink ◽  
Thermoelectric Generator ◽  
Thermoelectric Module

Heat sink does affect on the performance of thermoelectirc generator according to the studies of many authors. In this paper, an analytical model inculding the number of thermocouples and the thermal resistance of heat sink is derived. The match between the thermoelectric module and heat sink is discussed by numerical calculation also. The results show that the thermal resistance of thermoelectric module should be designed to match that of heat sink in order to get the highest output power for a given heat sink. But for a given thermoelectric module, the output power increases with the decrease of heat sink thermal resistance, and there is a suitable heat sink due to the limit of the temperature difference between the heat source and coolant.

scholarly journals FLOW FIELD NEAR AN OCEAN THERMAL ENERGY CONVERSION PLANT

1976 ◽  
Vol 1 (15) ◽  
pp. 174 ◽  
Author(s):  
D.M. Sheppard ◽  
G.M. Powell ◽  
I.B. Chou
Keyword(s):  
Low Temperature ◽  
Shear Flow ◽  
Flow Field ◽  
Energy Conversion ◽  
Thermal Energy ◽  
Temperature Difference ◽  
Cold Water ◽  
Water Pipe ◽  
Thermal Energy Conversion ◽  
Ocean Thermal Energy

The flow field in the vicinity of an Ocean Thermal Energy Conversion (OTEC) Plant is extremely complex. The plants will normally be located in an area of relatively high surface currents and the location must also be such that a large temperature difference exists between the lower layers and the surface. Locations that demonstrate this characteristic can in many cases be modeled as a two layer fluid as shown in Figure 1. A number of different designs for the OTEC plants are being considered, but they all have one thing in common, a large vertical cold water pipe. This pipe extends from near the surface to some point in the cold water layer (see Figure 1). In some designs this pipe is as large as 40 m in diameter and 460 m in length. Having such a large object penetrating the interface between the two temperature layers in the presence of a shear flow can significantly alter the character of the interface. The highly turbulent wake downstream from the pipe can drastically effect the mixing across this density interface. A conventional heat engine cycle is used in the plant with the high temperature source being the water in the upper layers and the low temperature reservoir being the water from the lower depths. \ Since the temperature difference is small for this type of plant (20° max.), vast quantities of both high and low temperature water must be used. The intake and discharge for the warm water as well as the cold water discharge will be in the upper layer; the intake for the cold water will be in the lower layer at or near the end of the cold water pipe. The flow problem is thus one of a vertical cylinder in a two layer stratified shear flow with sources and sinks located along the cylinder.

scholarly journals Research on Engine Exhaust Energy Recovery by a Heat Pipe Exchanger with a Semiconductor Thermoelectric Generator

2015 ◽  
Vol 9 (1) ◽  
pp. 130-140 ◽  
Author(s):  
Jun Fu ◽  
Yuan Tang ◽  
Wei Chen ◽  
Yi Ma ◽  
Zhiguo Zhu
Keyword(s):  
Temperature Distribution ◽  
Heat Pipe ◽  
Output Power ◽  
Temperature Difference ◽  
Thermoelectric Generator ◽  
Engine Performance ◽  
Engine Exhaust ◽  
Working Performance ◽  
Exhaust Energy ◽  
Good Agreement

A heat pipe exchanger was adopted to recover the engine exhaust energy and its internal gas pressure. Velocity and temperature distribution were obtained with the computational fluid dynamics software called ‘FLUENT’. Based on the simulation results, the structure of the exchanger was improved, and its working performance was verified by experiments. The experiments showed that the pressure loss of the exchanger is only about 850 Pa, which has less influence on engine performance and is in good agreement with the simulation, as this is a more homogeneous internal air temperature distribution with better exchanger’s efficiency. And by measuring the output power under the temperatures 335 K, 355 K, 375 K and 395 K, respectively, at the cold end of the semiconductor thermoelectric generator, it was found that it had the same cold end temperature and the temperature difference was over 100 K. The output power increases rapidly at first and then continues to grow but at a decreasing rate, and the largest output power is 75.6 W when the cold end temperature is 335 K with the temperature difference of 380 K, and in addition to this it was observed that under the same temperature difference, the lower cold end temperature is the larger the output power.

scholarly journals Numerical analysis of semiconductor thermoelectric generator

2020 ◽  
Vol 24 (3 Part A) ◽  
pp. 1585-1591
Author(s):  
Zhifei Wu ◽  
Yuxia Xiang ◽  
Jianjun Wang
Keyword(s):  
Contact Resistance ◽  
Output Power ◽  
Temperature Difference ◽  
Output Voltage ◽  
Thermoelectric Generator ◽  
Maximum Output Power ◽  
Load Resistance ◽  
Maximum Output ◽  
Generation Model ◽  
Output Performance

A thermoelectric generation model is proposed based on the structure of thermoelectric generator, working conditions, the effect of air heat transfer and contact resistance in thermoelectric components. In addition, the effect of the thermoelectric generator output performance under the condition of different temperature of the cold and heat source, contact resistance between the cold-end and hot-end, the load resistance and the contact resistance is calculated. The results show that the output voltage is linear associate with the temperature difference between hot and cold ends, however, the output power increase along with the increase of temperature of hot-end and decrease of cold-end. The output voltage reaches 5.76 V and the output power reaches 9.81 W when the temperature difference is 200?C. Assume that the contact resistance is ignored, the output voltage and power reach peak values of 3.61 V and 3.85 W. The output performance of thermoelectric generator decreases with the increase of thermal contact resistance at hot and cold ends, and the reduction is getting lower and lower. With the increase of the load resistance, the output power increases at the beginning and then decreases. The optimal output power is 3.69 W when the contact resistance is 0 ? and the optimal load resistance is 3.3 ?. The maximum output power corresponding to neglecting the contact resistance will be reduced by 13.5% when the contact resistance is 0.5 ?.

Performance Analysis of Multi-Layer Thermoelectric Generators to be Used in a Thermoelectric Generator-Stirling Engine Hybrid System

2015 ◽  
Author(s):  
Mohammed Waliur Rahman ◽  
Khamid Mahkamov
Keyword(s):  
Performance Analysis ◽  
Low Temperature ◽  
Hybrid System ◽  
Temperature Difference ◽  
Thermoelectric Generator ◽  
Thermal Flux ◽  
Stirling Engine ◽  
Total Power ◽  
Thermoelectric Generators ◽  
Study Results

This paper demonstrates the performance analysis of various arrangements of thermoelectric generators to be used for the combination of a Low Temperature Difference Stirling Engine-Thermoelectric Generator hybrid system. To estimate whether the deployed Stirling Engines will perform on satisfactory level it is necessary to determine if a sufficient thermal flux can be provided to the heating part of the Low Temperature Difference Stirling Engine (LTD SE) from the “cold” side of the thermoelectric generator or their combination. This paper reports study results on the performance of a single layer and a cascaded two-layer thermoelectric generator made up of bulk material. These two generators were connected in series and in parallel to produce the combined thermoelectric module operating as a three-layer generator. Also computational data on the temperature distribution across the layers has been obtained using Finite Element Analysis as a part of ANSYS software. Results obtained demonstrate that both the single and two-layer generators provide sufficient heat flux to drive LTD SEs but the total power output from the two-layer generator-Stirling Engine system is considerable higher when the engine is coupled to a single and three-layered thermoelectric generator.

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