Showing papers in "Energy in 1997"
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TL;DR: In this article, the efficiencies of ORCs using cryogens such as benzene, ammonia, R11, R12, R134a and R113 as working fluids have been analyzed parametrically and compared.
900 citations
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TL;DR: In this paper, a methodology has been developed for assessing the sensitivity of electricity and natural gas consumption to climate at regional scales, which involves a multiple-regression analysis of historical energy and climate data, and has been applied to eight of the most energy intensive states, representing 42% of the total annual energy consumption in the United States.
306 citations
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TL;DR: Results indicate that intracellular ethanol production is simpler and less energy intensive than the conventional ethanol-fermentation process.
261 citations
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TL;DR: In this paper, the effects of CO2 concentration, reduction of recycled NOx, and interaction between fuel-N and recycled NOX on the decrease of the final NOx exhausted from the coal-combustion system with recycled CO2 have been separated for appropriate NOx-reduction mechanisms.
208 citations
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TL;DR: In this article, the applicability of exergy in the methodology of environmental life-cycle assessment (LCA) is discussed, where exergy consumption is used as a measure of resource depletion and competition when performing the impact assessment of an LCA.
183 citations
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TL;DR: In this article, the feasibility of combining the production of hydrogen from natural gas with CO2 removal was investigated and the incremental cost of the produced hydrogen (for CO2 compression plus transport, injection and storage) would typically be about 7% relative to the case where the separated CO2 is vented.
178 citations
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TL;DR: Autoregressive integrated moving average (ARIMA) models were developed using data for 5 yr and evaluated on forecasting new data for the sixth year as mentioned in this paper, and the optimum model derived is a multiplicative combination of seasonal and non-seasonal autoregressive parts, each being of the first order, following first differencing at both the seasonal and nonseasonal levels.
177 citations
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TL;DR: The most common sea water desalination systems available today are described in this paper, which are divided into two broad categories, namely, direct and indirect collection systems, where in the former, solar energy is absorbed and used in the same piece of equipment whereas in the latter, two separate sub-systems are used, one for solar energy conversion and one for desalinization.
142 citations
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TL;DR: In this paper, it was proved that the second alternative is preferred for blast-furnace slag when heated air is used for combustion in the hot blast stoves of the blast furnace.
130 citations
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TL;DR: In this paper, numerical simulations and combustion tests were performed to improve the combustibility of the O2/CO2-pulverized coal burner, and an oxygen-injection nozzle was added to the burner.
124 citations
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TL;DR: In this article, an energy-system optimisation model called MODEST has been applied to a typical local Swedish electricity and district-heating utility and to the national power system and has been used to decide which investments to make, the dimensioning of new installations, and the operation of all system components.
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TL;DR: In this article, the solubility and density of CO2 hydrate at 30 MPa were measured using a high-pressure facility suitable for simulating pressure and temperature conditions 3000 m beneath the ocean surface.
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TL;DR: In this paper, a computer analysis has been developed for studying the energy and exergy performance of an indirect-injection, naturally-aspirated diesel engine operating under transient load or speed conditions and covering the operating profile of both industrial and automotive engines.
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TL;DR: In this paper, the authors evaluated the technical and economic performance of an air-to-earth heat exchanger coupled to the system for heating or cooling of a building that uses 100% fresh air as a heating medium during winter and summer.
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TL;DR: In this article, the effect of water film cooling of the glass cover on the efficiency of a single-basin still has been investigated numerically and the results showed that the presence of the cooling film neutralizes the effects of wind speed on still efficiency.
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TL;DR: In this article, the performance of a silica-gel-water advanced adsorption chiller with consideration of the thermal capacitance ratio of the adsorbent and metal of the ad-desorber heat exchanger was analyzed.
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TL;DR: In this article, the exergy concept has been used to analyze two methane-fueled SOFC systems, which include preheating of fuel and air, reforming of methane to hydrogen, and combustion of the remaining fuel in an afterburner.
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TL;DR: In this article, an ethanol selectivity of 16.0% and a CO2 conversion of 26.7% were obtained at 5 MPa and 533 K in a flow of H2-CO2 premixed gas (H 2 CO 2 = 3 ) with a flow rate of 100 cm3/min over 5 wt% RhFe(1 : 2) SiO 2 catalysts.
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TL;DR: Abductive network machine learning is proposed as an alternative to the conventional multiple regression analysis method for modelling and forecasting monthly electric energy consumption as mentioned in this paper, which requires fewer input parameters, are more accurate and are easier and faster to develop.
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TL;DR: Sub-seabed disposal is the safest disposal option for CO 2. Water pressure and dilution into oceanic water prevent direct emission of CO 2 into the air as mentioned in this paper. But it is difficult to find suitable disposal locations in the ocean.
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TL;DR: The IEA Greenhouse Gas R&D Programme is an international collaboration supported by 16 countries and several industrial organisations as mentioned in this paper, whose purpose is to evaluate technologies for reducing emissions of greenhouse gases.
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TL;DR: In this article, the feasibility of cooling using two solid-gas reactors has been tested experimentally with a low-power machine and the ambient temperature was 313 K. The power output of the reactors was determined as a function of cooling temperature for air conditioning and refrigeration.
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TL;DR: In order to counter worsening air pollution in Turkey caused by increasing energy demands, an experimental study has been undertaken at the TUBITAK-Marmara Research Centre to determine possibilities of using energy-friendly plant sweet sorghum as an alternative fuel.
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TL;DR: In this article, the Stirling heat engine operating in a closed regenerative thermodynamic cycle is analyzed and the maximum power density and efficiency are found and the compression ratio at maximum power densities is determined.
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TL;DR: In this article, a data base of clathrate-hydrate-covered CO2 droplet surface concentration is presented, which is essential for an analysis of liquid CO2 dissolution behavior.
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TL;DR: In this paper, a comparative study on thermally stratified tanks for hot storage is presented, where a two-dimensional model is employed for the pure conduction case and a numerical solution is obtained using the control-volume technique due to Patankar.
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TL;DR: In this article, the authors examined load-frequency control of isolated WDMHPS provided with conventional proportional-plus-integral controllers with an integral-square-error (ISE) criterion.
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TL;DR: The dynamic energy optimization model deeco as mentioned in this paper is a tool for analyzing competition and synergy between different technologies of rational use of energy and for utilizing renewable energies for a given time series of the fluctuating heat and electricity demand, calculates the optimal combination of energy-conversion technologies while taking into account local parameters like ambient temperature and insolation.
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TL;DR: In this paper, an endoreversible cogeneration cycle using finite-time thermodynamics was investigated and the optimum values of the design parameters of the cogenerations cycle at maximum exergy output were determined.
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TL;DR: In this article, the capacity factor of a wind turbine is estimated for shape factors between 1.5 and 3 and for sites with average wind speeds ranging from 4 to 8 m/s.