scholarly journals Research on energy efficiency of operation of city gas networks

2019 ◽  
pp. 29-34
Author(s):  
Ya. V. Grudz ◽  
R. B. Stasyuk ◽  
M. Ya. Krill
Keyword(s):  
Energy Efficiency ◽  
Distribution Network ◽  
Operational Reliability ◽  
Efficiency Coefficient ◽  
Hydraulic Efficiency ◽  
Gas Distribution ◽  
Total Energy Consumption ◽  
Gas Network ◽  
Gas Networks ◽  
City Gas

The task of choosing the criterion of energy efficiency of operation of city gas networks of high and medium pressure, under the condition of transition to the system of individual energy supply is set and solved. It is shown that in conditions of substantial increase of prices for natural gas and deepening of its deficit, the city gas network is often not able to provide consumers with energy in a given volume, so the approach to forecasting its operating modes should fundamentally change. First of all it concerns the field of permissible modes, which in such conditions considerably expands. Given the reloading of the gas distribution network as a result of changing the nature of gas consumption, a large role is given to the criteria for energy efficiency of gas transportation and to ensure maximum operational reliability while being within the scope of optimal maintenance. In order to assess the energy efficiency of gas transportation by gas pipelines of a distribution network, it is suggested to use the notion of the net efficiency coefficient, which is determined by the ratio of useful work performed when providing a given volume of gas transportation by pipelines to total energy consumption. It is shown that the efficiency of the distribution network or its individual elements differs fundamentally from the coefficient of its hydraulic efficiency, which is a characteristic of the technical state of the system. On the basis of analytical studies, the correlation between them is established. Calculated dependencies are proposed for determining the coefficient of hydraulic efficiency of a branched gas pipeline as an element of an urban gas distribution network. The influence of various factors on the value of the coefficient of hydraulic efficiency of the urban gas distribution network has been analyzed. The examples of calculating the efficiency of the network are given, conclusions on improving the efficiency of operation are made.

GIS for City Gas Distribution Network

2019 ◽  
Author(s):  
Ravindra Kumar Singh
Keyword(s):  
Decision Support ◽  
Emergency Response ◽  
Support System ◽  
Distribution Network ◽  
Gas Distribution ◽  
Web Based ◽  
Gas Network ◽  
City Gas ◽  
Marketing Tool ◽  
Gis System

“A Web Based City-GIS system to manage City Gas distribution Network” CityGas is a web based GIS system capable of handling city gas network by maintaining up-to-date information in centralized enterprise database, providing support for analysis, engineering, O&M, planning activities and acting as a valuable decision support system for planning & emergency response. CityGas is an effective marketing tool for gas distribution companies.

SERVICEABILITY OF NATURAL GAS DISTRIBUTION NETWORKS AFTER EARTHQUAKES

2013 ◽  
Vol 07 (02) ◽  
pp. 1350005 ◽  
Author(s):  
GIAN PAOLO CIMELLARO ◽  
ALESSANDRO DE STEFANO ◽  
OMAR VILLA
Keyword(s):  
Natural Gas ◽  
Distribution Network ◽  
Distribution Networks ◽  
Small Towns ◽  
Disaster Resilience ◽  
Gas Distribution ◽  
Gas Network ◽  
Resilience Index ◽  
Entire Network

The concept of disaster resilience has received considerable attention in recent years and it is increasingly used as an approach for understanding the dynamics of natural disaster systems. No models are available in literature to measure the performance of natural gas network, therefore, in this paper, a new performance index measuring functionality of gas distribution network have been proposed to evaluate the resilience index of the entire network. It can be used for any type of natural or manmade hazard which might lead to the disruption of the system. The gas distribution network of the municipalities of Introdacqua and Sulmona, two small towns in the center of Italy which were affected by 2009 earthquake have been used as case study. Together the pipeline network covers an area of 136 km2, with 3 M/R stations and 16 regulation groups. The software SynerGEE has been used to simulate different scenario events. The numerical results showed that, during emergency, to ensure an acceptable delivery service, it is crucial to guarantee the functionality of the medium pressure gas distribution network. Instead to improve resilience of the entire network the best retrofit strategy is to include emergency shutoff valves along the pipes.

City gas distribution projects delay in India: a critical assessment of risks

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Atul Rawat ◽  
Sumeet Gupta ◽  
T. Joji Rao
Keyword(s):  
Risk Factors ◽  
Distribution Network ◽  
Management Approach ◽  
Financial Risks ◽  
Gas Distribution ◽  
Content Type ◽  
City Gas ◽  
Score Method ◽  
The City ◽  
Network Project

Purpose This study aims to identify and rank the operational and financial risks causing a delay in the commencement of the city gas distribution project in India. Design/methodology/approach This study reviews the literature to identify operational and financial risks variables associated with infrastructure projects. Followed by a survey to isolate and assess the critical risk factors for city gas distribution network project in India. The survey data is evaluated using factor analysis to understand the latent structure of the critical risk factors. Second, the author ranks the identified variables as per significance by using the mean score method. Findings Five critical risk factors with 20 variables were extracted and assessed to build more understanding of their significance and impact on city gas distribution network project. Originality/value This study is the first attempt to follow the management approach to identify and rank operational and financial risks impacting city gas distribution project.

scholarly journals Control Strategies for Daylight and Artificial Lighting in Office Buildings—A Bibliometrically Assisted Review

Energies ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3852
Author(s):  
Daniel Plörer ◽  
Sascha Hammes ◽  
Martin Hauer ◽  
Vincent van Karsbergen ◽  
Rainer Pfluger
Keyword(s):  
Energy Efficiency ◽  
Energy Demand ◽  
Control Strategies ◽  
Significant Proportion ◽  
Decisive Role ◽  
Future Trend ◽  
Office Buildings ◽  
Total Energy Consumption ◽  
Integral Control ◽  
Artificial Lighting

A significant proportion of the total energy consumption in office buildings is attributable to lighting. Enhancements in energy efficiency are currently achieved through strategies to reduce artificial lighting by intelligent daylight utilization. Control strategies in the field of daylighting and artificial lighting are mostly rule-based and focus either on comfort aspects or energy objectives. This paper aims to provide an overview of published scientific literature on enhanced control strategies, in which new control approaches are critically analysed regarding the fulfilment of energy efficiency targets and comfort criteria simultaneously. For this purpose, subject-specific review articles from the period between 2015 and 2020 and their research sources from as far back as 1978 are analysed. Results show clearly that building controls increasingly need to address multiple trades to achieve a maximum improvement in user comfort and energy efficiency. User acceptance can be highlighted as a decisive factor in achieving targeted system efficiencies, which are highly determined by the ability of active user interaction in the automatic control system. The future trend is moving towards decentralized control concepts including appropriate occupancy detection and space zoning. Simulation-based controls and learning systems are identified as appropriate methods that can play a decisive role in reducing building energy demand through integral control concepts.

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