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Carbon sequestration with enhanced gas recovery (CS-EGR) is a well-known technology for safe and economical Carbon Capture, Utilization and Storage (CCUS). However, there is lack of a robust and comprehensive approach to study the optimization of the CS-EGR process. In this paper, a multi-objective optimization code based on a genetic algorithm is combined with the multi-phase flow solver TOUGH2 for...
The main objective of the present study is to perform an in-depth exergetic analysis of a double-pass/glazed v-corrugated plate solar air heater based on exergy loss terms. Consequently, the detailed thermal modeling of the given air heater is carried out and validated with literature which shows good agreements. Through an exergy analysis performed with regard to internal/external exergy losses,...
In recent years, sustainability receives greater attention due to increasing demands and limited resources worldwide. The Indian state of Uttarakhand is rich in the availability of renewable energy resources such as solar, micro hydro, biomass, wind etc. Optimum utilization of these resources in stand-alone mode has been recognized as an economical and efficient option compared to grid extension for...
In this study, biomass-based EL (ethyl levulinate) was evaluated as an additional fuel to biodiesel and diesel. Physical and chemical properties, including intersolubility, cold flow properties, spray evaporation, oxidation stability, anti-corrosive property, cleanliness, fire reliability and heating value of twelve different EL–biodiesel–diesel blends were analyzed. The results show that the fuel...
In this paper, a semi-empirical Lithium-iron phosphate-graphite battery aging model is identified over data mimicking actual cycling conditions that a hybrid electric vehicle battery encounters under real driving scenarios. The aging model is then used to construct the severity factor map, used to characterize relative aging of the battery under different operating conditions. This is used as a battery...
The rule of thumb in literature is that 20% of biodiesel is the most acceptable blend ratio in alternative fuel blends. This work focuses on in-depth mathematical optimization analyses of ternary blends of diesel–butanol–vegetable oil (cotton oil), based on engine operating parameters using RSM (response surface methodology). It is critical to achieve the maximum power and torque for customers while...
Complex turbine (i.e., steam turbine with multiple controlled and uncontrolled extractions) is one of the most important components in industrial utility system. The function of complex turbine is to generate power electricity, provide steam for the processes, and heat boiler feedwater using uncontrolled extraction steam. Although many studies have focused on the modeling and optimization of utility...
A CCP (combined cooling and power) system, which integrated a flash-binary power generation system with a bottom combined cooling and power subsystem operating through the combination of an organic Rankine cycle and an ejector refrigeration cycle, was developed to utilize geothermal energy. Thermodynamic and exergoeconomic analyses were performed on the system. A performance indicator, namely the...
An optimization model is developed to determine the most advantageous size of autonomous hybrid photovoltaic/wind turbine/fuel cell, wind turbine/fuel cell and photovoltaic/fuel cell systems for electrification of a remote area involving five homes (1 block) located in Namin, Ardabil, Iran. The model is developed based on three decision variables related to the system renewable energy components:...
Processing streams featuring low temperatures are common in industrial systems. Because of low temperatures it turns out to be a challenge to use these type of streams for energy recovery. This is especially true if water is used as the main fluid for energy recovery since large amounts of energy are required for water vaporization. To cope with this energy problem different types of organic fluids...
Owing to the intermittent solar irradiance from cloud cover in the diurnal period and unavailability at night time, the practical design of a solar system requires energy backup storage for an uninterrupted supply or for off-grid operation. However, for highly efficient CPV (concentrated photovoltaic) system, the literature is lacking for energy management and optimization algorithm and tool for standalone...
With the encouragement of LNG (liquefied natural gas) application in China, CCHP (combined cooling heating and power) system fueled by natural gas has been receiving increasing attention. This paper presents optimization of CCHP system on their design and operation from energetic analysis, economic operation and environment effect viewpoints. CCHP system for hotels, offices and residential buildings...
In this paper a superstructure optimization is applied for the problem of olefin separation system which includes distillation column units, heat exchangers and heat integration. A new algorithm is presented for modeling the separation system and designing the heat integration and heat exchanger networks. The objective is to minimize the total annual cost of the separation superstructure using the...
This paper presents steady-state and transient models and optimization of natural gas liquefaction using Aspen HYSYS. Steady-state exergy and heat exchanger efficiency analyses summarize the performance of several potential systems. Transient analyses of the optimal steady-state model produced most of the results discussed here. These results pertain to LNG (liquefied natural gas) generally and to...
The potential of banana peels as a suitable catalyst for conversion of Bauhinia monandra seed oil (BMSO) to fatty acidy methyl ester (FAME) in a transesterification reaction was investigated. The FAME was produced through a two-step method of esterification and transesterification. The high free fatty acid (FFA) content of BMSO was reduced in the esterification reaction to less than 1% using reaction...
Due to the rapid development of renewable energy and waste energy recovery, absorption energy storage is an important technology with promising future. However, because most researches focus on working fluid flow rather than energy flow used in electric power systems, it is hard to analyze the entire systems as a whole. This contribution introduces the electrical circuit analogy to analyze absorption...
Bottom-up energy system models rely on cost optimization to produce energy scenarios that inform policy analyses, debates and decisions. This paper reviews the rationale for the use of cost optimization and questions whether cost-optimal scenarios are adequate proxies of the real-world energy transition. Evidence from ex-post modeling shows that cost optimization does not approximate the real-world...
This paper presents an optimization of transonic cantilevered stators based on the combination of sweep and lean in a 5-stage axial compressor to improve its adiabatic efficiency and maintain its total pressure ratio by employing a time-saving integrated optimization design system. The system combines design of experiment with artificial neural network and computational fluid dynamics. The optimization...
In this study, new relationships between the energy efficiency of street lighting systems, street width, and luminaire height were derived from the analysis of a large sample of outputs, generated with a software application widely used for lighting design. The result was a quadratic polynomial that perfectly fit the relationships obtained and whose coefficients characterize each type of luminaire...
A chemical or petrochemical site is generally made up of several plants that are linked together through process streams. The linking process streams are often cooled down in their source plants, then transferred into storage tanks, and reheated in destination plants. This repeatedly cooling and heating results in low energy-use efficiency and more area installed in heat exchanger network. In this...
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