Investments in combined heat and power plants: influence of fuel price on cost minimised operation

Sundberg, Gunnel; Henning, Dag

doi:10.1016/s0196-8904(01)00065-6

Cited by 69 publications

(19 citation statements)

References 2 publications

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“…The major factors that need to take into consideration for economic evaluation are: capital cost, operating and maintenance cost, fuel price and price of energy purchased and sold [10] . The daily and annual hours of operation are also critical in determining the cost effectiveness of the energy system's installation.…”

Section: Economic Analysismentioning

confidence: 99%

Performance research of a micro-CCHP system with adsorption chiller

Kong

Wang²,

et al. 2010

J. Shanghai Jiaotong Univ. (Sci.)

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This paper describes a new micro-combined cooling, heating and power (CCHP) system, which is especially suitable for domestic and light commercial applications. It mainly consists of a natural gas-fired internal combustion engine, a silica gel-water adsorption chiller and other heat recovery units. In order to study the energy efficiency and economic feasibility, an experimental investigation has been carried out. The experimental system has a rated electricity power of 12 kW, a rated cooling capacity of 9 kW and a rated heating capacity of 28 kW. Evaluation and analysis of the system are discussed in detail. The testing results show that the energy efficiency of the overall system depends on different modes. The overall thermal and electrical efficiency is over 70%. Higher heat load supplied causes higher efficiency of the system. Economic evaluation shows that the micro-CCHP system enjoys a small capital cost and short payback period, which is easily accepted by customers. At current natural gas price of 1.9 RMB/m 3 (nominal condition) and electric price of 0.754 RMB/(kW·h), the total capital cost is only 90 000 RMB with a payback period of 3.21 years.

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Section: Economic Analysismentioning

confidence: 99%

Performance research of a micro-CCHP system with adsorption chiller

Kong

Wang²,

et al. 2010

J. Shanghai Jiaotong Univ. (Sci.)

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“…Different fuel prices can influence the operating cost and consequently the best alternative when studying different energy options [38]. The sensitivity of the results to changes in (1) fuel prices, (2) initial investment, and (3) efficiency of systems is investigated in this section.…”

Section: Sensitivity Analysismentioning

confidence: 99%

Techno-economic analysis of renewable energy source options for a district heating project

Ghafghazi¹,

Sowlati²,

Sokhansanj³

et al. 2009

Int. J. Energy Res.

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SUMMARYWith the increased interest in exploiting renewable energy sources for district heating applications, the economic comparison of viable options has been considered as an important step in making a sound decision. In this paper, the economic performance of several energy options for a district heating system in Vancouver, British Columbia, is studied. The considered district heating system includes a 10 MW peaking/backup natural gas boiler to provide about 40% of the annual energy requirement and a 2.5 MW base-load system. The energy options for the base-load system include: wood pellet, sewer heat, and geothermal heat. Present values of initial and operating costs of each system were calculated over 25-year service life of the systems, considering tax savings due to depreciation and operating costs, and salvage value of equipment and building and resale price of land in the cash flow analysis. It was shown that the natural gas boiler option provided less expensive energy followed by the wood pellet heat producing technologies, sewer heat recovery, and geothermal heat pump. Among wood pellet technologies, the grate burner was a less expensive option than powder and gasifier technologies. It was found that using natural gas as a fuel source for the peaking/backup system accounted for 37% of the heat production cost for the considered district-heating center. The results show that the cost of produced heat from wood pellet grate burner is well comparable to that of the natural gas boiler. Emissions of the systems are also calculated in this study. It is shown that the natural gas boiler for the base-load heat production would produce more than 4300 tonnes of GHG emission per year, while wood pellet burning systems are GHG neutral. Sensitivity analysis on various inputs to the economic model has been carried out. It was shown that 20% increase in capital cost of the natural gas base-load system or 1% decrease in wood pellet price inflation would make the wood pellet grate burner economically preferable to the natural gas boiler.

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“…A peculiarity of Italian energy system is its taxation, which requires the introduction of special constraints that differentiate our model from others in literature (Mavrotas et al, 2003;Sundberg and Henning, 2002). In particular, natural gas taxes vary depending on adopted technology and final use of energy produced; special reductions are established for cogeneration (with slightly higher discounts for self consumed power}self in Equation (4)}than for sold power}sales in Equation (4)) and for district heating.…”

Section: Constraintsmentioning

confidence: 99%

From hospital to municipal cogeneration systems: an Italian case study

Meneghetti

Nardin

Simeoni

2007

Int. J. Energy Res.

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A mixed integer linear programming model combined with a more traditional design by scenarios is proposed to optimize facilities size and operation mode of a municipal energy system involving significant civil centres and a hospital. Moving from the need of a new heat and power station for the local hospital due to the construction of new pavilions, the opportunity of involving other centres in the neighbourhood in a distributed cogeneration system is analysed, increasing system complexity step by step. Smaller cogeneration units tailored to hospital needs are rewarding ventures with relatively low risks but, in a country whose traditional power generation systems heavily rely on fossil fuels and where energy policy and market conditions can make it profitable to sell surplus power, district heating systems foster the installation of larger cogenerators and lead thereby to higher profits and to better performance as for primary energy savings and greenhouse gases emission reduction

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Investments in combined heat and power plants: influence of fuel price on cost minimised operation

Cited by 69 publications

References 2 publications

Performance research of a micro-CCHP system with adsorption chiller

Performance research of a micro-CCHP system with adsorption chiller

Techno-economic analysis of renewable energy source options for a district heating project

From hospital to municipal cogeneration systems: an Italian case study

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