IMPROVING THE EFFICIENCY OF HOT GAS GENERATORS FOR HEATING AUTOMOTIVE EQUIPMENT

2021 ◽  
Vol 2 (143) ◽  
pp. 46-53
Author(s):  
Andrey V. Negovora ◽  
◽  
Makhmut M. Razyapov ◽  
Arseniy A. Kozeyev
Keyword(s):  
Heat Pipe ◽  
Thermal Energy ◽  
Thermal Power ◽  
Research Purpose ◽  
Gas Generator ◽  
Thermoelectric Converter ◽  
Remote Monitoring System ◽  
Hot Gas ◽  
Safety Research ◽  
Gas Generators

Hot gas generators are used as a source of thermal energy for pre-start preparation of motor vehicles in cold climatic conditions. Their wide application is due to the high thermal power and safety. (Research purpose) The research purpose is in determining the possibilities of using thermoelectric modules to reduce the energy consumption of the battery by hot gas generators. (Materials and methods) Authors used research methods based on the application of standard techniques, while the object of research was the power supply system of a thermal energy source. (Results and discussion) Authors conducted research on ways and methods to reduce the electric consumption of a hot gas generator by recuperating thermal energy into electrical energy using thermoelectric generator modules. The thermoelectric converters installed on the heat pipe of the hot gas generator, due to the high temperature difference, will allow to obtain a high value of the electromotive force. Modeling of the nozzle in the software package of the Ansys three-dimensional modeling system showed that part of the heat energy goes through the surface of the heat pipe. The article proposes the use of a nozzle with a thermoelectric converter installed on the outer surface of the cylinder instead of a heat pipe. The article presents the mathematical model of an improved hot gas generator nozzle. (Conclusions) The use of a thermoelectric converter for the utilization of thermal energy and the replacement of energy losses of the battery, which feeds the hot gas generator, will reduce the internal power losses of the battery and increase the technical readiness of automotive equipment. The introduction of a comprehensive heat treatment system, which is intelligently and functionally linked to a remote monitoring system, will significantly increase the service life of the units most exposed to temperature influences.

Numerical Simulation of Heat Pipe-Assisted Latent Heat Thermal Energy Storage Unit for Dish-Stirling Systems

2013 ◽  
Vol 136 (2) ◽  
Author(s):  
Hamidreza Shabgard ◽  
Amir Faghri ◽  
Theodore L. Bergman ◽  
Charles E. Andraka
Keyword(s):  
Energy Storage ◽  
Heat Pipe ◽  
Latent Heat ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Solar Irradiance ◽  
Thermal Power ◽  
Temporal Variations ◽  
Storage Unit ◽  
Energy Storage Unit

A two-dimensional numerical model is developed to simulate the transient response of a heat pipe-assisted latent heat thermal energy storage (LHTES) unit integrated with dish-Stirling solar power generation systems. The unit consists of a container which houses a phase change material (PCM) and two sets of interlaced input and output heat pipes (HPs) embedded in the PCM. The LHTES unit is exposed to time-varying concentrated solar irradiance. A three-stage operating scenario is investigated that includes: (i) charging only, (ii) simultaneous charging and discharging, and (iii) discharging only. In general, it was found that the PCM damps the temporal variations of the input solar irradiance, and provides relatively smooth thermal power to the engine over a time period that can extend to after-sunset hours. Heat pipe spacing was identified as a key parameter to control the dynamic response of the unit. The system with the greatest (smallest) heat pipe spacing was found to have the greatest (smallest) temperature drops across the LHTES, as well as the maximum (minimum) amount of PCM melting and solidification. Exergy analyses were also performed, and it was found that the exergy efficiencies of all the systems considered were greater than 97%, with the maximum exergy efficiency associated with the system having the minimum heat pipe spacing.

The Concept of Building Petrothermal Thermal Power Plants

2021 ◽  
Vol 1 (42) ◽  
pp. 44-49
Author(s):  
Valentin Gusarov ◽  
◽  
Dmitriy Pisarev ◽  
Elena Gusarova ◽  
◽  
...  
Keyword(s):  
Thermal Energy ◽  
Power Plants ◽  
Thermal Power ◽  
Hydrocarbon Fuels ◽  
Earth’S Crust ◽  
Fuel Oil ◽  
Research Purpose ◽  
Electricity Supply ◽  
Thermal Power Plants ◽  
Earth's Crust

The article describes he prospect of using petrothermal energy for the needs of public utilities and electricity generation. (Research purpose) The research purpose is in justifying a new method for developing deep high-temperature layers of the earth’s crust in order to obtain a hot coolant for petrothermal thermal power plants that provide heat and electricity supply systems for rural settlements and agro-industrial facilities. (Materials and methods) In rural areas where there are small cities, the population uses traditional hydrocarbon fuels for heat and electricity supply to the residential sector and public infrastructure: natural gas, fuel oil, diesel fuel, coal, which have a high cost and logistical losses. (Results and discussion) K.E. Tsiolkovsky described a method for obtaining thermal energy from the earth’s interior by drilling wells, heating the coolant and feeding it to the surface for further use. The hot layers of the earth’s crust are present throughout the land and sea areas of the world, but the temperature gradient in various places ranges from 2.5 to 4 degrees Celsius per 100 meters of depth. Petrothermal thermal power plants are cogeneration power plants, the efficiency of which can reach 80-85 percent and their location is possible in all climatic zones. (Conclusions) Petrothermal energy is an affordable source of thermal energy that can replace hydrocarbon fuels, nuclear energy, and low-efficiency solar and wind energy in Russia. In any small town or village that is cut off from centralized energy networks, it is possible to build a local thermal power plant that does not require the purchase of hydrocarbon fuel.

Design and Development of a Process Plant Gas Generator Installation

1984 ◽  
Author(s):  
G. A. Reynolds
Keyword(s):  
Gas Turbines ◽  
Gas Flow ◽  
El Paso ◽  
Gas Generator ◽  
Design And Development ◽  
Hot Gas ◽  
Process Plant ◽  
Gas Generators

In 1972 El Paso Products investigated the possibility of replacing their existing industrial gas generators with an alternative. These gas turbines provided a constant hot gas flow to the catalysts of their butadiene plant in Odessa Texas. This project demanded the highest reliability and offered some unique engineering challenges.

Numerical Simulation of Heat Pipe-Assisted Latent Heat Thermal Energy Storage Unit for Dish-Stirling Systems

2013 ◽  
Author(s):  
Hamidreza Shabgard ◽  
Amir Faghri ◽  
Theodore L. Bergman ◽  
Charles E. Andraka
Keyword(s):  
Energy Storage ◽  
Heat Pipe ◽  
Latent Heat ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Solar Irradiance ◽  
Thermal Power ◽  
Temporal Variations ◽  
Storage Unit ◽  
Energy Storage Unit

A two-dimensional model is developed to simulate the transient response of a heat pipe-assisted latent heat thermal energy storage (LHTES) unit that is combined with dish-Stirling solar power generation systems. The unit consists of a container which houses a phase change material (PCM) and two sets of interlaced input and output heat pipes (HPs) embedded in the PCM. The LHTES unit is exposed to time-varying concentrated solar irradiance. A three-stage operating scenario is investigated that includes: (i) charging only, (ii) simultaneous charging and discharging, and (iii) discharging only. In general, it was found that the PCM damps the temporal variations of the input solar irradiance, and provides relatively smooth thermal power to the engine over a time period that can extend to after-sunset hours. Heat pipe spacing was identified as a key parameter to control the dynamic response of the unit. The system with the greatest (smallest) heat pipe spacing was found to have the greatest (smallest) temperature drops across the LHTES, as well as the maximum (minimum) amount of PCM melting and solidification. Exergy analyses were also performed, and it was found that the exergy efficiencies of all the systems considered were greater than 97%, with the maximum exergy efficiency associated with the system having the minimum heat pipe spacing.

scholarly journals Comparative study between heat pipe and shell-and-tube thermal energy storage

2021 ◽  
Vol 192 ◽  
pp. 116974
Author(s):  
Jose Miguel Maldonado ◽  
David Verez ◽  
Alvaro de Gracia ◽  
Luisa F. Cabeza
Keyword(s):  
Energy Storage ◽  
Comparative Study ◽  
Heat Pipe ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Shell And Tube

Interaction of Wheelspace Coolant and Main Flow in a New Aeroderivative LPT

2006 ◽  
Author(s):  
Francesco Montomoli ◽  
Michela Massini ◽  
Nicola Maceli ◽  
Massimiliano Cirri ◽  
Luca Lombardi ◽  
...  
Keyword(s):  
Flux Distribution ◽  
Low Pressure ◽  
Main Flow ◽  
Space Region ◽  
Heat Flux Distribution ◽  
Gas Generator ◽  
Component Reliability ◽  
Accuracy Requirement ◽  
Low Pressure Turbine ◽  
Hot Gas

Increased computational capabilities make available for the aero/thermal designers new powerful tools to include more geometrical details, improving the accuracy of the simulations, and reducing design costs and time. In the present work, a low-pressure turbine was analyzed, modeling the rotor-stator including the wheel space region. Attention was focused on the interaction between the coolant and the main flow in order to obtain a more detailed understanding of the behavior of the angel wings, to evaluate the wall heat flux distribution, and to prevent hot gas ingestion. Issues of component reliability related to thermal stress require accurate modeling of the turbulence and unsteadiness of the flow field. To satisfy this accuracy requirement, a full 3D URANS simulation was carried out. A reduced count ratio technique was applied in order to decrease numerical simulation costs. The study was carried out to investigate a new two-stage Low Pressure Turbine from GE Infrastructure Oil&Gas to be coupled to a new aeroderivative gas generator, the LM2500+G4, developed by GE Infrastructure, Aviation.

scholarly journals Influence of void ratio on phase change of thermal energy storage for heat pipe receiver

2016 ◽  
Vol 25 (2) ◽  
pp. 275-287 ◽  
Author(s):  
X. Gui ◽  
T. Li ◽  
D. Yuan ◽  
Sh. Liang ◽  
D. Tang ◽  
...  
Keyword(s):  
Energy Storage ◽  
Phase Change ◽  
Heat Pipe ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Void Ratio

scholarly journals Enhancement of the Thermal Energy Storage Using Heat-Pipe-Assisted Phase Change Material

Energies ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 6176 ◽  
Author(s):  
Hamidreza Behi ◽  
Mohammadreza Behi ◽  
Ali Ghanbarpour ◽  
Danial Karimi ◽  
Aryan Azad ◽  
...  
Keyword(s):  
Energy Storage ◽  
Phase Change ◽  
Heat Pipe ◽  
Latent Heat ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Phase Change Materials ◽  
Liquid Fraction ◽  
Energy Storage Applications ◽  
Change Material

Usage of phase change materials’ (PCMs) latent heat has been investigated as a promising method for thermal energy storage applications. However, one of the most common disadvantages of using latent heat thermal energy storage (LHTES) is the low thermal conductivity of PCMs. This issue affects the rate of energy storage (charging/discharging) in PCMs. Many researchers have proposed different methods to cope with this problem in thermal energy storage. In this paper, a tubular heat pipe as a super heat conductor to increase the charging/discharging rate was investigated. The temperature of PCM, liquid fraction observations, and charging and discharging rates are reported. Heat pipe effectiveness was defined and used to quantify the relative performance of heat pipe-assisted PCM storage systems. Both experimental and numerical investigations were performed to determine the efficiency of the system in thermal storage enhancement. The proposed system in the charging/discharging process significantly improved the energy transfer between a water bath and the PCM in the working temperature range of 50 °C to 70 °C.

scholarly journals Research of Operation Factors of the of Bullerjan Stove in the Program Environmentfor 3D Simulation

2018 ◽  
Vol 7 (4.3) ◽  
pp. 350
Author(s):  
A. Kagramanyan ◽  
A. Onishchenko ◽  
J. Babichenko ◽  
A. Podoprigora
Keyword(s):  
Temperature Distribution ◽  
Heat Pipe ◽  
3D Modeling ◽  
Thermal Power ◽  
Flow Simulation ◽  
Heat Pipes ◽  
3D Simulation ◽  
Heat Output ◽  
Thermophysical Characteristics ◽  
Airflow Velocity

The article is devoted to the calculation of the thermal power of the Bullerjan stove according to a preconstructed model, which is realized in the 3D modeling environment of SolidWorks 2016. The thermophysical characteristics of the processes passing through the heat pipes of the Bullerjan stove were studied in detail. In the course of the work, the values of airflow velocity and temperature distribution, the temperature distribution of a solid, the surface of the heat pipe, that in the end allowed us to obtain the values of the heat output of the oven. The obtained data made it possible to determine the value of the heat output of the oven on the mode of smoldering wood and on the mode of flaming burning. The thermal power of a Bullerjan stove and in particular, its flow simulation module for modeling the flow of liquids and gases were obtained. 

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