scholarly journals Technology for safe and energy-efficient storage of liquefied petroleum gas at strategic facilities

2021 ◽  
Vol 83 (1) ◽  
pp. 297-302
Author(s):  
S. A. Shevtsov ◽  
E. V. Fetisov
Keyword(s):  
Heat Pump ◽  
Energy Efficient ◽  
Alternative Energy ◽  
Control Object ◽  
Fire Risk ◽  
Vapor Compression ◽  
Liquefied Petroleum Gas ◽  
Technological Parameters ◽  
Efficient Storage ◽  
Temperature Regimes

A technology for safe and energy efficient storage of liquefied petroleum gas (LPG) at strategic facilities has been proposed. A strategy for controlling the technological parameters of the process of condensation of LPG vapors and regasification of the liquid phase has been developed. The peculiarity of the technology lies in the use of a vapor compression heat pump as a source of alternative energy with stabilization of temperature regimes, preventing LPG losses and providing a given regasification performance when supplied to the consumer. The compressor of the heat pump allows to provide the required degree of compression in the operating temperature range in the heat pump condenser, and throttling of the refrigerant through the thermostatic valve ensures the stabilization of the required pressure corresponding to the set range of values of the boiling points of the refrigerant in the evaporator. The regulation of these parameters under conditions of random disturbances caused by external factors creates conditions for the complete condensation of LPG vapors of various compositions formed as a result of its self-evaporation, and also maintains the productivity of the regasification process in the range of specified values, regardless of the climatic zone. The proposed automatic control will ensure the accuracy and reliability of control by reducing the spread of controlled parameters, ensuring their variation in a given range, which is a significant reserve for the intensification of thermal processes while reducing the magnitude of the fire risk and increasing the environmental safety of the environment, including through the use of harmless, non-flammable, non-explosive refrigerant. The use of operational information from the control object to regulate the temperature regimes of condensation of vapors of liquefied hydrocarbon gas in the evaporator and its regasification in the condenser of a vapor compression heat pump within the specified values creates optimal conditions for storing and dispensing gas in large-capacity tanks with minimal energy costs.

Energy efficient biomorphic pulse information coding in electronic neurons for the entrance unit of the neuroprocessor

2019 ◽  
Vol 5 (3) ◽  
pp. 186-212 ◽  
Author(s):  
Alexander D. Pisarev
Keyword(s):  
Neural Networks ◽  
Energy Efficiency ◽  
Energy Efficient ◽  
Information Transfer ◽  
Biological Systems ◽  
Technological Parameters ◽  
Input Unit ◽  
Efficient Operation ◽  
Electric Circuits ◽  
Electronic Neuron

This article studies the implementation of some well-known principles of information work of biological systems in the input unit of the neuroprocessor, including spike coding of information used in models of neural networks of the latest generation.<br> The development of modern neural network IT gives rise to a number of urgent tasks at the junction of several scientific disciplines. One of them is to create a hardware platform&nbsp;— a neuroprocessor for energy-efficient operation of neural networks. Recently, the development of nanotechnology of the main units of the neuroprocessor relies on combined memristor super-large logical and storage matrices. The matrix topology is built on the principle of maximum integration of programmable links between nodes. This article describes a method for implementing biomorphic neural functionality based on programmable links of a highly integrated 3D logic matrix.<br> This paper focuses on the problem of achieving energy efficiency of the hardware used to model neural networks. The main part analyzes the known facts of the principles of information transfer and processing in biological systems from the point of view of their implementation in the input unit of the neuroprocessor. The author deals with the scheme of an electronic neuron implemented based on elements of a 3D logical matrix. A pulsed method of encoding input information is presented, which most realistically reflects the principle of operation of a sensory biological neural system. The model of an electronic neuron for selecting ranges of technological parameters in a real 3D logic matrix scheme is analyzed. The implementation of disjunctively normal forms is shown, using the logic function in the input unit of a neuroprocessor as an example. The results of modeling fragments of electric circuits with memristors of a 3D logical matrix in programming mode are presented.<br> The author concludes that biomorphic pulse coding of standard digital signals allows achieving a high degree of energy efficiency of the logic elements of the neuroprocessor by reducing the number of valve operations. Energy efficiency makes it possible to overcome the thermal limitation of the scalable technology of three-dimensional layout of elements in memristor crossbars.

Buildings

2017 ◽  
Author(s):  
Peter Rez
Keyword(s):  
Heat Transfer ◽  
Heat Pump ◽  
Energy Efficient ◽  
Energy Use ◽  
Fossil Fuel ◽  
Local Climate ◽  
Heating And Cooling ◽  
The Difference ◽  
As If

Most of the energy used by buildings goes into heating and cooling. For small buildings, such as houses, heat transfer by conduction through the sides is as much as, if not greater than, the heat transfer from air exchanges with the outside. For large buildings, such as offices and factories, the greater volume-to-surface ratio means that air exchanges are more significant. Lights, people and equipment can make significant contributions. Since the energy used depends on the difference in temperature between the inside and the outside, local climate is the most important factor that determines energy use. If heating is required, it is usually more efficient to use a heat pump than to directly burn a fossil fuel. Using diffuse daylight is always more energy efficient than lighting up a room with artificial lights, although this will set a limit on the size of buildings.

scholarly journals Latent heat storage integration into heat pump based heating systems for energy-efficient load shifting

2021 ◽  
Vol 236 ◽  
pp. 114042
Author(s):  
Tianhao Xu ◽  
Emma Nyholm Humire ◽  
Justin Ningwei Chiu ◽  
Samer Sawalha
Keyword(s):  
Latent Heat ◽  
Heat Pump ◽  
Energy Efficient ◽  
Heat Storage ◽  
Latent Heat Storage ◽  
Load Shifting ◽  
Heating Systems

scholarly journals Towards energy-efficient storage servers

2017 ◽  
Author(s):  
Vinícius Machado ◽  
Amanda Braga ◽  
Natália Rampon ◽  
Jean Bez ◽  
Francieli Boito ◽  
...  
Keyword(s):  
Energy Efficient ◽  
Storage Servers ◽  
Efficient Storage

scholarly journals Energy Communities Design Optimization in the Italian Framework

2021 ◽  
Vol 11 (11) ◽  
pp. 5218
Author(s):  
Matteo Zatti ◽  
Matteo Moncecchi ◽  
Marco Gabba ◽  
Alberto Chiesa ◽  
Filippo Bovera ◽  
...  
Keyword(s):  
Member State ◽  
Heat Pump ◽  
Energy Efficient ◽  
Optimization Problem ◽  
Community Initiatives ◽  
Operation Optimization ◽  
Energy Community ◽  
Energy Assets ◽  
Key Aspects ◽  
Italian Legislation

Energy communities (EC) are expected to have a pivotal role to reach European decarbonization targets. One of the key aspects is the regulatory framework adopted by each Member State to properly manage such new customers’ aggregation. The paper firstly provides an updated overview of the EC regulation, focusing on the current Italian legislation. Next, a novel methodology for the design and management of energy community initiatives is proposed. The procedure firstly solves a design and operation optimization problem to calculate the best size of energy assets (boiler, heat pump, photovoltaic, thermal storage) to be installed. Second, a Shapley value-based approach is exploited to distribute a part of the community’s incomes to members, based on their contribution to the overall welfare. Results demonstrate that the adopted methodology is effective in ensuring a proper cash flow for the community, while pushing its members towards energy efficient behaviors.

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