scholarly journals Research and design of grid connection and waste heat utilization of marine generating units

2020 ◽  
Vol 165 ◽  
pp. 06003
Author(s):  
Anning Yi ◽  
Hongtao Guo
Keyword(s):  
Power Generation ◽  
Service Life ◽  
Temperature Difference ◽  
Electromagnetic Interference ◽  
Frequency Conversion ◽  
Waste Heat ◽  
Economic Benefits ◽  
Energy Output ◽  
Utilization Rate ◽  
Energy Unit

This work is based on the use of waste heat from the temperature difference semiconductor heat exchanger, which can effectively use the waste heat in the exhaust gas, and convert it into electrical energy output through the temperature difference semiconductor material, which can increase engine efficiency and reduce energy consumption; at the same time, it can reduce engine noise and vibration. Extended service life. Due to the strong electromagnetic interference and severe vibration of the generator, there are few remote control devices on the market for the generator. This project uses a 2.4G wireless communication module to control the frequency conversion and speed regulation of the generator. In order to save manpower, start remotely, stop as soon as possible, monitor the operating status of the waste heat temperature difference power generation, reasonably replace the power, start quickly, and reach the electromechanical Integrated product. The realization of intelligent frequency conversion technology can adjust the engine speed according to different electrical appliances, adapt to external loads, realize automatic voltage adjustment, and save fuel consumption. The grid-connected system solves the frequency and phase problems of generators of different models, generations, and manufacturers in parallel, and realizes the re-mixing of old generators, which greatly improves the service life of engines and the best power generation supply, and reduces power generation systems and storage. The configuration cost of the energy unit improves the comprehensive utilization rate of the equipment, has a higher working efficiency, has good economic benefits, and can achieve the purpose of energy saving and emission reduction.

scholarly journals Optimization design of thermal system for industrial waste heat power generation

2021 ◽  
Vol 261 ◽  
pp. 01047
Author(s):  
Fengchang Sun ◽  
Shiyue Li ◽  
Zhonghua Bai ◽  
Changhai Miao ◽  
Xiaochuan Deng ◽  
...  
Keyword(s):  
Power Generation ◽  
Industrial Waste ◽  
Optimization Design ◽  
Waste Heat ◽  
Design Method ◽  
Utilization Rate ◽  
Thermal System ◽  
Heat Power ◽  
Waste Heat Boiler ◽  
Industrial Waste Heat

In order to improve the utilization rate of industrial waste heat and improve the fine design level of waste heat power station, this paper constructs the mathematical model of waste heat boiler and steam turbine, and puts forward the optimization design method of thermal system of waste heat power generation project. By using typical cases, it is proved that there is the optimal design pressure of HRSG, which makes the power generation of the system maximum, and provides a method to improve the power generation of HRSG.

Analysis of Cement Kiln Waste Heat Power Generation System Using the Exergy Analysis Method

2013 ◽  
Vol 860-863 ◽  
pp. 639-644
Author(s):  
Jian Gang Wang ◽  
Pu Yan Zheng ◽  
Zhi Yun Zhou ◽  
Yan Zhou Yuan
Keyword(s):  
Power Generation ◽  
Energy Saving ◽  
Energy Use ◽  
Waste Heat ◽  
Scientific Basis ◽  
Economic Benefits ◽  
Cement Kiln ◽  
Heat Power ◽  
Generation System ◽  
Power Generation System

Power generation using waste heat from cement kiln can not only bring economic benefits to the enterprise, but also play an important role in environment protection. Constantly researches have proved that there is still large energy saving potential in its operation. In this paper, the waste heat power generation system was divided into several subsystems, and the exergy calculation model of each subsystem unit was established. Finally, the weakest part in energy use was found according to the results. It provides a scientific basis for performance improvement and energy saving transformation of waste heat power generation.

A Novel Thermoelectric Generator for the Detection of Electrical Equipment

2013 ◽  
Vol 743-744 ◽  
pp. 105-110
Author(s):  
Hong Tao Yu ◽  
Zhi Feng Zhang ◽  
Qing Quan Qiu ◽  
Qiang Sun ◽  
Guo Min Zhang ◽  
...  
Keyword(s):  
Power Generation ◽  
Temperature Difference ◽  
Thermoelectric Generator ◽  
Low Voltage ◽  
Waste Heat ◽  
Electrical Equipment ◽  
Cold Side ◽  
Simulation And Experiment ◽  
The One ◽  
High Level

Semiconductor thermoelectric generators have a series of advantages, such as compact volume, high-level reliability, and effective power generation in the presence of temperature difference. In many occasions, as a result of high voltage, electrical equipments can't be measured by the way of direct contact. In order to avoid equipment faults caused by low-voltage contact, a thermoelectric generator which uses waste heat of electrical equipments in service was designed. Electrical equipments often operate below 400K, and in this condition Bi2Te3 shows an outstanding performance of power generation. In order to solve the problems of little temperature difference and output power on steady-state, two methods were introduced. On the one hand, the temperature difference can be increased by filling with thermal insulation padding between the p-n junctions and using a heat sink in the cold side, and on the other hand, the output voltage and power will be augmented by increasing the number of p-n junctions. These methods have been proved effectively by simulation and experiment with promising outcomes.

ENERGY AND EXERGY ANALYSIS OF COMPACT POWER GENERATION AND HYBRID SOLAR ENERGY-WASTE HEAT-BASED TRIPLE EFFECT EJECTOR-VAPOR ABSORPTION REFRIGERATION CYCLE

2013 ◽  
Vol 21 (04) ◽  
pp. 1350023 ◽  
Author(s):  
RAJ KUMAR ◽  
ANIL KUMAR
Keyword(s):  
Power Generation ◽  
Exergy Analysis ◽  
Waste Heat ◽  
Energy Output ◽  
Refrigeration Cycle ◽  
Absorption Refrigeration ◽  
Energy And Exergy ◽  
Energy And Exergy Analysis ◽  
Exhaust Energy ◽  
Vapor Absorption Refrigeration

An NH 3– H 2 O ejector-absorption refrigeration cycle, and an R-152a ejector refrigeration cycle are employed with a renewable energy power generator to make a proposed compact power generation and triple effect ejector-absorption refrigeration cycle. The exergy analysis of the cycle leads to a possible performance improvement. Approximately 71.69% of the input exergy is destructed due to irreversibilities in different components. Around 7.976% is available as the useful exergy output. The exhaust exergy lost to the environment is 20.33%, which is lower than the exhaust energy loss of 47.95%, while the useful energy output is 27.88%. The refrigerants used are of zero ODP and negligible GWP, and the CO 2 emission of the exhaust gases is very small as compared to that of the fossil fuel run engine, hence, this cycle is favorable to the global environment. The results also show that the proposed cycle has significant higher energy and exergy efficiency than the earlier investigated 'triple effect refrigeration cycle' and 'the combined power and ejector-refrigeration cycle'.

Evaluation on the Power-Generation Capacity of an Implantable Thermoelectric Generator Driven by Radioisotope Fuel

2013 ◽  
Vol 135 (7) ◽  
Author(s):  
Yang Yang ◽  
Jing Liu
Keyword(s):  
Power Generation ◽  
Temperature Difference ◽  
Thermoelectric Generator ◽  
Skin Surface ◽  
Bioheat Transfer ◽  
Energy Output ◽  
Transfer Model ◽  
Surface Cooling ◽  
Generation Capacity ◽  
Working Performance

Embedding a thermoelectric generator (TEG) in a biological body is a promising way to supply electronic power in the long term for an implantable medical device (IMD). The unique merit of such a method lies in its direct utilization of the temperature difference intrinsically existing throughout the whole biological body. Therefore, it can resolve the service life mismatch between the IMD and its battery. In order to promote the stability of the power-generation capacity of the implanted TEG, this paper is dedicated to study a low cost and highly safe practical pattern of implanting a TEG driven by the radioisotope fuel into a human body. Recurring to the thermal energy releasing during disintegration of the radioactive isotope, it can guarantee a marked promotion in the temperature difference across the implanted TEG, consequently supplying enough power for the IMDs. A bioheat transfer model with or without a large vessel is established to characterize the feasibility and working performance of the method. The numerical simulation and parametric studies on tissue status, device properties, and environmental conditions revealed that, no matter in what conditions, the implanted TEG driven by the radioisotope fuel can always offer a much higher energy output than that provided by body heat alone. Meanwhile, in vivo/surrounding environment, isotope conditions, and intentional skin surface cooling also exhibit a direct influence on the temperature distribution of the implantable TEG and thus affect the working performance. Coordinating with the intentionally imposed cooling on the skin surface, the maximum TEG power can reach several mW, which is strong enough to meet the power consumption of the IMDs. These results were expected to be a valuable reference for designing an implantable TEG, which may actually be used in future clinics.

scholarly journals Thermoelectric Generation Of Current – Theoretical And Experimental Analysis

2017 ◽  
Vol 38 (4) ◽  
pp. 3-13 ◽  
Author(s):  
Adam Ruciński ◽  
Artur Rusowicz
Keyword(s):  
Power Generation ◽  
Electric Current ◽  
Temperature Difference ◽  
Waste Heat ◽  
Electric Circuit ◽  
Heat Sources ◽  
Ongoing Research ◽  
Experimental Stand ◽  
Peltier Modules ◽  
Voltage Generation

Abstract This paper provides some information about thermoelectric technology. Some new materials with improved figures of merit are presented. These materials in Peltier modules make it possible to generate electric current thanks to a temperature difference. The paper indicates possible applications of thermoelectric modules as interesting tools for using various waste heat sources. Some zero-dimensional equations describing the conditions of electric power generation are given. Also, operating parameters of Peltier modules, such as voltage and electric current, are analyzed. The paper shows chosen characteristics of power generation parameters. Then, an experimental stand for ongoing research and experimental measurements are described. The authors consider the resistance of a receiver placed in the electric circuit with thermoelectric elements. Finally, both the analysis of experimental results and conclusions drawn from theoretical findings are presented. Voltage generation of about 1.5 to 2.5 V for the temperature difference from 65 to 85 K was observed when a bismuth telluride thermoelectric couple (traditionally used in cooling technology) was used.

Evaluation of the Power-Generation Capacity of Implantable Thermoelectric Power Generator Driven by Radioisotope Fuel

2011 ◽  
Author(s):  
Yang Yang ◽  
Jing Liu
Keyword(s):  
Power Generation ◽  
Service Life ◽  
Thermoelectric Power ◽  
Thermal Energy ◽  
Temperature Difference ◽  
Radioactive Isotope ◽  
Thermoelectric Generator ◽  
Power Generator ◽  
Thermoelectric Power Generator ◽  
Generation Capacity

The unique merit of the implantable thermoelectric generator lies in its direct utilization of the temperature difference intrinsically existing throughout the whole biological body. Therefore, it can resolve the service life mismatch between the IMD and its battery. In order to promoting the TEG maximum power, a piece of radioisotope fuel was fixed on the TEG hot junction. Recurring to the thermal energy released during disintegration of radioactive isotope, it can guarantee a marked promotion in the temperature difference across the implanted TEG; consequently apply enough power for the IMDs.

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