... improving energy recovery by utilizing the heat rejected from the condenser of low-temperature cycle to vaporize seawater for desalination in the evaporator of the high-temperature cycle of the proposed cascade system. A mathematical model of the innovative system based on thermodynamic and economic...

... in the Chief expressing opinions on questions that in effect would “second-guessing” the decisions of a drilling company. On the other hand, the current evaluation method may overestimate the economic value of unitization in this and similar circumstances, at least under certain ranges of expected prices...

...Amela Ajanovic; Gerfried Jungmeier; Martin Beermann; Reinhard Haas The core objective of this paper is to investigate the perspectives of “renewable fuels” mainly from an energetic point-of-view in a dynamic framework until 2050 in comparison to fossil fuels. In addition, the impact on the economic...

... efficiency (based on the lower heating value of the produced hydrogen) is 47.1% at a hydrogen-production rate of 2.356 kg/s. This hydrogen-production efficiency is considerably higher than can be achieved using current low-temperature electrolysis techniques. An economic analysis of this plant was performed...

...) technology is critical. Techno-economic studies establish the large expense of CCS due to substantial energy requirements and capital costs. However, such analyses typically ignore operating dynamics in response to diurnal and seasonal variations in electricity demand and pricing, and they assume that CO 2...

...Tahar Khir; Rahim K. Jassim; Galal M. Zaki An optimization for the geometrical parameters of continuous fins on an array of tubes of a refrigeration evaporator is developed in this paper using the exergy method. The method is based on exergy, economic analysis, and optimization theory...

... , and M. J. Moran , eds., Copenhagen, June 30–July 2, Vol. 1 , pp. 365 – 372 . 01 04 2005 09 05 2006 fault diagnosis exergy economics thermal power stations thermodynamics The actual operation performance of an energy system may differ from the design one because...

... of the limited studies on the application of the AHP method to GISAGHPs, as no studies on the GISAGHPS have appeared in the literature. In this context, an economic analysis is performed based on the life cycle costing technique first. The results are then evaluated by applying the AHP method to a study, which...

... capabilities to recognize well problems and optimize production. A simple economic model is provided that an operator can use to assess the balance between the cost of performing periodic well tests and the benefits of more quickly discovering well problems that can result in less than expected production...

... listed in Standard 90.1-1999, as well as the potential from several higher efficiency levels. We estimated the annual energy consumption for each type of equipment, at various efficiency levels, through engineering simulations for seven building types in 11 U.S. locations. We also conducted an economic...

... by the AES Division, May 5, 2000; revised manuscript received November 30, 2001. Associate Editor: D. L. O’Neal. 05 05 2000 30 11 2001 25 03 2002 heat pumps refrigerators heat transfer economics heat exchangers cost optimal control Optimization...

...L. Cedola; G. Di Stasio Power plants use burning processes with a heavy environmental impact. Traditional design models aim to optimize economic and thermodynamic performances. Owing to the new sensitivity arising towards the environment, power generation design must respect the environment. Today...

..., it was necessary to the set up the physical model (based on mass, energy, and exergy balance equations) and the economic model in order to define the decision variables and the objective function. The latter is the total cost of the whole assembly, obtained by summing up the capital costs to the running costs...