scholarly journals Current situation and problems of natural gas distributed generation investment in China

2016 ◽  
Author(s):  
Jun Dong ◽  
Hongxin Cai
Keyword(s):  
Natural Gas ◽  
Distributed Generation ◽  
Current Situation ◽  
Investment In China

Economic Optimization of a Distributed Generation System for an Orifice Building

2006 ◽  
Author(s):  
M. E. Douglas ◽  
Michael K. Sahm ◽  
William J. Wepfer
Keyword(s):  
New York ◽  
Natural Gas ◽  
Distributed Generation ◽  
Economic Optimization ◽  
Generation System ◽  
Advantages And Disadvantages ◽  
Reciprocating Engines ◽  
Natural Gas Prices ◽  
Electrical Generation ◽  
Selection Of

Methodologies have been developed to aid in selection of a candidate distributed generation system for use in meeting a building's electrical demand. The systems studied are comprised of a combination of microturbines and/or natural gas reciprocating engines. These systems could also be used as prime movers in a combined heat and power application. Economic optimizations have been performed in order to identify distributed generation/prime mover combinations and operating strategies that yield the lowest electrical generation cost. These optimizations take into account a finite set of operating scenarios and equipment combinations. In addition to the economic optimizations, a direct comparison of customer design considerations has been made, highlighting the advantages and disadvantages of both microturbines and reciprocating engines. In this study, the optimal system for a 9290 m2 (100,000 ft2) office building in New York City at today's natural gas prices was determined to be a combination of natural gas reciprocating engines and microturbines. This system yielded a 5% reduction in generation costs over other cases examined including all homogeneous composition systems. With an increase in natural gas prices, the optimal case changes to be comprised solely of natural gas reciprocating engines. It has been shown that many factors are important to selection of optimal equipment including the specific end use load profile, cost of fuel, and system operating strategy.

Economical and Environmental Aspects of the Microturbine’s Application in Brazil

2002 ◽  
Author(s):  
Eli Eber Batista Gomes ◽  
Vladimir Rafael Melian Cobas ◽  
Marco Antoˆnio Rosa do Nascimento ◽  
Electo Eduardo Silva Lora
Keyword(s):  
Natural Gas ◽  
Distributed Generation ◽  
Experimental Evaluation ◽  
Minas Gerais ◽  
Small Scale ◽  
Study Group ◽  
Environmental Aspects ◽  
Thermal Systems ◽  
The Future ◽  
The Cost

Microturbine generators have shown good perspectives for small scale distributed generation. In Brazil, the Thermal Systems Study Group of Federal School of Engineering of Itajuba´, sponsored by the CEMIG (Electrical Utility of Minas Gerais), is developing a project about experimental evaluation of microturbines systems. The objective of this paper is to evaluate the cost of generating electricity with microturbines and show the emissions range of microturbines operating with natural gas. The cost of the microturbine generators as well as the cost of the electricity and natural gas in Brazil at this moment and the projection for the future were considered.

Economic Analysis of Distributed Generation Options With Wide Turndown

2009 ◽  
Author(s):  
Winston S. Burbank ◽  
Dennis E. Witmer ◽  
Frank Holcomb
Keyword(s):  
Natural Gas ◽  
Distributed Generation ◽  
Peak Power ◽  
Net Present Value ◽  
Carbon Tax ◽  
Present Value ◽  
Historical Cost ◽  
Capital Costs ◽  
Internally Cooled ◽  
Base Load

Solid oxide fuel cell gas turbine (SOFCGT) hybrid systems have received much attention due to high predicted efficiencies, low emissions and low historical cost of natural gas. For market acceptance three criteria must be met: reliability, commercial availability and a positive net present value. This study deals primarily with the latter, comparing the net present value of the following four engines operating under a distributed or isolated loads: a simple cycle microturbine, a novel internally-cooled and recuperated (ICR) microturbine, a novel SOFCGT hybrid supported by the same ICR microturbine, and a standard diesel engine. Due to the higher value of peak power, a system able to meet fluctuating power demands while retaining high efficiencies is strongly preferable to base load operation. Sensitivity analysis is made for variable prices of natural gas, electric rates, carbon tax, and SOFC capital costs.

Greenhouse Gas Reduction Potential With Combined Heat and Power With Distributed Generation Prime Movers

2012 ◽  
Author(s):  
Scott J. Curran ◽  
Timothy J. Theiss ◽  
Michael J. Bunce
Keyword(s):  
Fuel Cells ◽  
Natural Gas ◽  
Distributed Generation ◽  
Gas Turbines ◽  
Reduction Potential ◽  
Combined Heat And Power ◽  
Ghg Reduction ◽  
Prime Movers ◽  
Electrical Generation ◽  
The U.S

Pending or recently enacted greenhouse gas regulations and mandates are leading to the need for current and feasible GHG reduction solutions including combined heat and power (CHP). Distributed generation using advanced reciprocating engines, gas turbines, microturbines and fuel cells has been shown to reduce greenhouse gases (GHG) compared to the U.S. electrical generation mix due to the use of natural gas and high electrical generation efficiencies of these prime movers. Many of these prime movers are also well suited for use in CHP systems which recover heat generated during combustion or energy conversion. CHP increases the total efficiency of the prime mover by recovering waste heat for generating electricity, replacing process steam, hot water for buildings or even cooling via absorption chilling. The increased efficiency of CHP systems further reduces GHG emissions compared to systems which do not recover waste thermal energy. Current GHG mandates within the U.S Federal sector and looming GHG legislation for states puts an emphasis on understanding the GHG reduction potential of such systems. This study compares the GHG savings from various state-of-the-art prime movers. GHG reductions from commercially available prime movers in the 1–5 MW class including, various industrial fuel cells, large and small gas turbines, micro turbines and reciprocating gas engines with and without CHP are compared to centralized electricity generation including the U.S. mix and the best available technology with natural gas combined cycle power plants. The findings show significant GHG saving potential with the use of CHP. Also provided is an exploration of the accounting methodology for GHG reductions with CHP and the sensitivity of such analyses to electrical generation efficiency, emissions factors and most importantly recoverable heat and thermal recovery efficiency from the CHP system.

Corrigendum to “A sequential planning approach for Distributed Generation and natural gas networks” [Energy 127 (2017) 428–437]

Energy ◽  
2017 ◽  
Vol 141 ◽  
pp. 2688-2689
Author(s):  
Babatunde Odetayo ◽  
John MacCormack ◽  
W.D. Rosehart ◽  
Hamidreza Zareipour
Keyword(s):  
Natural Gas ◽  
Distributed Generation ◽  
Gas Networks ◽  
Planning Approach
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