Showing papers in "Energy Conversion and Management in 1980"

TL;DR: In this paper, the authors present a periodic analysis and observed performance of a double basin solar still, mounted on a stand, and show that the daily distillate production of such a still is on the average 36% higher than that of a single basin still.

TL;DR: In this article, the effect of three different working fluids (ammonia, propane, and freon-114) on the size of OTEC heat exchangesrs and system performance was analyzed.

TL;DR: In this paper, the authors present an analysis of periodic heat flux through a roof, on which a solar still has been placed, and show that on a typical hot day in Delhi, for high reflectivity of the bottom of the basin (on account of deposits or otherwise) the daily heat flux in the room gets reduced by 40% and the production of distilled water is 0.6 kg/m2 day; the produced swings in the heat flux also get reduced in magnitude.

TL;DR: In this article, an analysis of the transient performance of a basin type mounted still is presented, where explicit expressions for hourly variation of temperature of glass cover and water in the basin and distillate output have been obtained.

TL;DR: In this article, the authors presented monthly average total insolation values calculated for various locations in Libya, for actual sky conditions based on sunshine records, and showed that the optimum value of tilt angle for space heating systems is about latitude plus 15° while that for cooling systems is 0° A combination of horizontal roof and vertical south wall gives more or less uniform insolation throughout the whole year.

TL;DR: In this paper, the authors evaluated eight hybrid cycles on the basis of the following criteria: (1) thermodynamics, (2) experimental performance, (3) process design, applicability of fusion reactors, and (4) possibility of commercialization in about five years.

TL;DR: A theoretical analysis of the thermoelectric figure of merit based upon a two band conduction model for single and many valley semiconductors is presented in this paper. But the analysis is limited to the case of single-and many-valley semiconductor alloys and does not consider the effect of a reduction in grain size on the thermal conductivity.

TL;DR: In this article, the authors used the Describing-Function method to estimate the performance of a dynamical energy-conversion system (a second-order system in this particular case) with nonlinear damping.

TL;DR: In this paper, a one-dimensional analysis of diagonal-conducting-wall MHD channels leads to design principles for the power take-off and good qualitative agreement with experimental data.

TL;DR: An analytical method for optimising a set of α and ϵ values for specified set of operating conditions (plate temperature, ambient temperature, number of glass covers, wind velocity, solar flux etc.) has been proposed in this article.

TL;DR: In this article, a rotary positive displacement Brayton cycle engine was proposed, where the rotor is offset from the center of the stator so that the expansion volume is greater than the compression volume.

TL;DR: In this paper, the authors checked the significance of this contact pressure and found an essential improvement of the reproducibility by controlling the contact pressure, and increased the current densities at constant polarizations.

TL;DR: This is less of a revolutionary concept than it might seem. What it really involves is the recognition that the advent of cheap and abundant fossil fuels was a strikingly singular event in human affairs as mentioned in this paper.

TL;DR: In this paper, a semi-empirical model for the calculation of the pressure distribution and the mass flow rate of a compressible fluid flowing through a set of concentric annular orifices in series is presented.

TL;DR: In this paper, a methanol-air fuel cell battery for light tractionary purposes has been built using metal O-rings and a new stack building technique based on metal O rings.

TL;DR: In this paper, a new principle has been presented to convert wind energy directly into electric power, where the basic idea is that the wind carries charged particles and hence bears an electric current.

TL;DR: In this paper, the authors explored the energy savings obtainable through effective interseasonal energy transfer by means of a detailed dynamic computer simulation and showed that the ACES can be three to four times more energy efficient than the conventional systems investigated in this study.

TL;DR: In this paper, the authors investigated the cost effectiveness of a self-constructed and installed flat plate solar energy collector and found that the collector is cost effective because of its insulation property when installed inside a single glazed window.

TL;DR: In this article, the authors derived a "characteristic device resistance" defined in terms of open-circuit voltage and shortcircuit current, and a "dimensionless groupings" describing the equivalent circuit variables and its parameters.

TL;DR: In this paper, an increase in ion mobility by forced circulation of the electrolyte is shown to improve the efficiency of the charging process and the effect of electrode spacing on charging rate is discussed.

TL;DR: In this paper, the applicability of the stabilized region based on the fully ionized seed regime was theoretically studied for a nonequilibrium Faraday MHD generator, where Potassium-seeded argon plasma at 1500 K and 1 atm was assumed as the working gas.

TL;DR: In this paper, a Faraday type generator with diverging electrode walls for two types of velocity profiles, one with a source velocity and the other with a fully developed velocity, is discussed.

TL;DR: In this paper, an analysis is presented to predict, based on monthly means of hourly solar irradiation estimates, multi-plate architectural window systems net heat gain, for both diurnal and yearly cycle.

TL;DR: In this paper, the authors developed a model to forecast the consumption of fossil fuels by electric utilities on a month-to-month basis, where the share of each of these fuels is a function of relative prices, weather, time, seasonal factors and extraneous influences (e.g. a coal strike).