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Carbon Capture and Storage (CCS) has been acknowledged as a technology for CO2 emission reduction. However, developments to lower cost and energy consumption remains an important challenge.Exergetic and exergoeconomic analyses are methods which could be applied to optimize the energy consumption of CO2 capture technologies. An exergetic analysis reveals the locations and causes of inefficiency in...
Cement industry is considered as an energy intensive industry, owing to the huge amount of heat consumed in pyro-process unit. There are many conventional methods around, which can be applied to carry out energy targeting in a cement production plant, including conceptual, mathematical or even hybrid. However, full application of these approaches would be time-consuming and costly. So, in this research,...
Elastocaloric cooling (ECC) is considered as one of the candidates to replace vapor compression cycles, which use refrigerants with global warming potential (GWP) as working fluids. In order to properly understand the ECC system performance, it is critical to conduct analysis at the integrated system level. Also, due to the cyclic operation of an ECC system, dynamic modeling becomes necessary to capture...
Recently, Savonius vertical axis wind turbines due to their capabilities and positive properties have gained a significant attention. The objective of this study is to design and model a Savonius-style vertical axis wind turbine with direct discharge flow capability in order to ventilate buildings. For this purpose, a modeling procedure is defined and validated using available experimental results...
This paper experimentally studies the performance and feature of a kW-scale organic Rankine cycle system which was operated under various cooling conditions using R123 as working fluid. A self-designed radial inflow turbine was applied to this system in order to testing its performance. A test of the power generation system under various cooling conditions was conducted. The system performance and...
A two-dimensional, dynamic finite element model is developed to study the transient characteristics of linear-shaped thermoelectric generators (L-TEG) in this paper. The model considers the effect of an unsteady heat source, which is regarded as a time-varying thermal boundary condition. The temperature-dependent TE material properties are also taken into account. For two loading processes (i.e. heating...
Energy planning and management in the built environment should not limit their scope to reaching zero-energy or nearly zero-energy balances: they should aim for cost optimality as well. Only then can environmental and economic sustainability be attained. In this study, a set of energy systems that include exchange with electrical and heating grids are proposed for an existing single-family house in...
Micro-algal treatment technologies are an efficient and effective method for simultaneous biogas slurry nutrient removal and biogas upgrade. Three treatment technologies were investigated, utilizing different selected strains (mono-cultivation of microalgae, co-cultivation of microalgae with fungi, and co-cultivation of microalgae with activated sludge). Strains were cultivated by using biogas slurry...
The European Council has agreed ambitious EU climate and energy targets for 2030, including a 40% reduction in greenhouse gas emissions compared to 1990 levels and a minimum share of 27% renewable energy consumption. This paper investigates the challenges faced by the European power systems as the EU transitions towards a low carbon energy system with increased amounts of variable renewable electricity...
In this study, linear and nonlinear autoregressive distributed lag (ARDL) models are applied to examine the symmetric and asymmetric pass-through effect of oil price changes on four domestic price indices in Malaysia. The main objective of this work is to compare how oil price changes affect domestic prices at different levels (production/output, import price, producer price, and CPI) across sectors...
A combined system containing solid oxide fuel cell (SOFC), solar parabolic dish, double effect LiBr-H2O absorption chiller system and organic Rankine cycle is modeled and analyzed to design a novel poly-generation system producing: electricity, space heating and cooling and domestic hot water, for a commercial tower in Tehran. The system also contains a number of auxiliary components required for...
The possibility of ensuring the energy needed by a country is a fundamental requirement for the economic growth and social welfare of that country. The fulfillment of this need is particularly challenging for those countries that are characterized by a low level of energy self-sufficiency. The evaluation of energy security needs to consider different dimensions and is of the utmost importance as a...
This paper proposes a novel integration system of integrated solar energy combined cycle (ISCC), which uses the compressed air from the gas turbine compressor to heat the water from heat recovery steam generator (HRSG) with three pressure levels and to be the Heat Transfer Fluid (HTF) of solar collectors. For each high pressure integration and intermediate pressure integration, the solar energy is...
The aerodynamics of the blade sections constitute the core problem in the design of new-generation wind turbines. Aerodynamic theories for blade design suffer from the unavailability of aerodynamic coefficients for the airfoils involved in the blade. The aim of this work was therefore to develop an efficient and accurate tool for computing the flow parameters, reducing the need for complex and costly...
The use of concentrating solar technologies for supplying heat and power in industrial processes is investigated in this paper. The thermal energy produced by a solar field is stored in a TES system and subsequently used in a Heat and Power Generation (HPG) section. In particular, three different HPG configurations are analyzed. The electricity is generated in an Organic Rankine Cycle (ORC) unit while...
The problem of air pollution and greenhouse gas emissions is omnipresent today. Governments and civil society organizations are acting in concert to implement controls to limit the environmental consequences of human actions. The private sector is also changing, but it continues to lack strong incentives to initiate a substantial technological change in the direction of more “green products”. One...
This paper describes the construction of flexible symmetric and asymmetric supercapacitors made of carbon cloth, polyaniline and carbon nanotubes. The electrode materials (nanostructures of polyaniline-carbon nanotubes, PANI-CNT) were supported on carbon cloth acting as current collector. PANI-CNT nanostructures were synthesized through an oxidative polymerization process in the monomer (aniline)...
The utilization scale of biomass solid densified fuel (BSDF) in China is still far from reaching the 2020 target of the national plan. Promoting the utilization of pellet fuel from corn straw (CSPF) is an effective way to increase the utilization of BSDF considering its resource potential and convenience for distributed use. To enhance scientific support for the corresponding policy research, this...
Highly intermittent power, generated by wind energy in an isolated hybrid power system (IHPS), results in severe frequency and power fluctuation. The aim of this paper is to carry out a comparative study of scaling factor (SF) based fuzzy logic controller (FLC) (SF-FLC), SF-FLC with proportional-integral (PI) (SF-FLC-PI) controller, SF-FLC with proportional-derivative (PD) (SF-FLC-PD) controller and...
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