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Academic literature on the topic 'Condensed stories'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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Journal articles on the topic "Condensed stories"

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Nichols, Tracy R., Margaret Brown, Sheryl L. Coley, Allyson Kelley, and Kelly Mauceri. "“I Managed It Pretty Good”: Birth Narratives of Adolescent Mothers." Journal of Perinatal Education 23, no. 2 (2014): 79–88. http://dx.doi.org/10.1891/1058-1243.23.2.79.

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The aim of this study was to understand adolescent mothers’ childbirth experiences. Semistructured interviews were conducted with participants recruited from a community-based program for adolescent mothers. Fourteen mothers described their birth experiences. Using a narrative analytic approach, responses were reconstructed into birth stories. Stories, condensed into poetic form, were compared and contrasted. Four unique categories emerged: connected births, surreal births, disconnected births, and disempowered births. Categories differed by agency, support, and emotional tone. Positive support was found in stories that portrayed high agency and positive affect, whereas problematic support was apparent in stories that conveyed passivity, frustration, and disappointment. This study has implications for tailoring childbirth education for adolescent mothers and can inform health-care professionals working with this population.

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Graca, Joanna. "Deutsche Kürzestgeschichte: Erzähltheoretische Analyse ausgewählter „short short stories“ von Kerstin Hensel und Heiner Feldhoff." Studia Litteraria 15, no. 4 (2020): 253–62. http://dx.doi.org/10.4467/20843933st.20.021.12542.

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German Shortest Story: A Narratological Analysis of Chosen „Short Short Stories” by Kerstin Hensel and Heiner Feldhoff Kürzestgeschichte (lit. shortest story), which is the German term for a subcategory of short story, became established as a literary genre in the 20th century. Its condensed content conformed to the hectic pace of life but, in terms of the issues discussed, it was more essential and dedicated to an experienced reader. In this paper, a narratological analysis of selected shortest stories by Heiner Feldhoff and Kerstin Hensel will be conducted. A methodological basis for the analysis is the categories implemented by Gérard Genette. Its aim is to provide an answer to the question whether shortest stories could be, like any other epic texts, subject to a narratological analysis and to what extent the length of a text might influence the findings of such an analysis.

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Leggett, Anthony J. "Matchmaking Between Condensed Matter and Quantum Foundations, and Other Stories: My Six Decades in Physics." Annual Review of Condensed Matter Physics 11, no. 1 (March 10, 2020): 1–16. http://dx.doi.org/10.1146/annurev-conmatphys-031119-050704.

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I present some rather selective reminiscences of my long career in physics, from my doctoral work to the present. I do not spend time on topics such as the nuclear magnetic resonance behavior of 3He, as I have reviewed the history extensively elsewhere, but rather concentrate, first, on my long-running project to make condensed matter physics relevant to questions in the foundations of quantum mechanics, and second, on various rather “quirky” problems such as an attempt to amplify the effects of the parity violation due to the weak interaction to a macroscopic level, and an unconventional proposal for the mechanism of the first-order phase transition between the A and B phases of superfluid liquid 3He.

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Meerson, Baruch. "Mortal Brownian motion: Three short stories." International Journal of Modern Physics B 33, no. 16 (June 30, 2019): 1950172. http://dx.doi.org/10.1142/s0217979219501728.

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Mortality introduces an intrinsic time scale into the scale-invariant Brownian motion. This fact has important consequences for different statistics of Brownian motion. Here we are telling three short stories, where spontaneous death, such as radioactive decay, puts a natural limit to “lifetime achievements” of a Brownian particle. In story 1 we determine the probability distribution of a mortal Brownian particle (MBP) reaching a specified point in space at the time of its death. In story 2 we determine the probability distribution of the area A = [Formula: see text] x(t)dt of an MBP on the line. Story 3 addresses the distribution of the winding angle of an MBP wandering around a reflecting disk in the plane. In stories 1 and 2 the probability distributions exhibit integrable singularities at zero values of the position and the area, respectively. In story 3 a singularity at zero winding angle appears only in the limit of very high mortality. A different integrable singularity appears at a nonzero winding angle. It is inherited from the recently uncovered singularity of the short-time large-deviation function of the winding angle for immortal Brownian motion.

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Wills, Stewart. "Optics in Africa: Six Stories." Optics and Photonics News 32, no. 5 (May 1, 2021): 44. http://dx.doi.org/10.1364/opn.32.5.000044.

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DONG, MINGHAI, LI SONG, and YING SHAO. "TOP JOINT STUDY ON TEMPERATURE STRESS FOR SUPER-LONG SLAB-COLUMN STRUCTURE." International Journal of Modern Physics B 22, no. 31n32 (December 30, 2008): 5643–48. http://dx.doi.org/10.1142/s0217979208050942.

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In this paper, top joint method is proposed to solve a practical engineering problem of temperature stress and temperature crack of super-long slab-column structure bearing temperature difference. From the study, it is shown that as for super-long slab-column structure undergoing temperature difference of inside and outside, joint located in bottom stories nearly has no influence on temperature stress and deformation while joint in top stories can significantly reduce temperature stress and deformation of super-long slab-column structures. In addition, comparison of joints located in top one story, top several stories and from bottom to top stories indicates that influences of them on temperature stress and deformation are similar. As for top joint method, among which cantilever plate method, double column method and corbel method are discussed and results indicate that influence effects of these methods on structures are similar.

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Blaufuss, Kathrin. "De-linking text from fieldwork." Power and Narrative 17, no. 1 (October 30, 2007): 13–26. http://dx.doi.org/10.1075/ni.17.1.04bla.

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In the construction of an academic thesis, the lived and multi-voiced experiences of fieldwork have to be condensed and distilled into a single, coherent narrative thread. This article discusses the problematic and delicate situation of attempting to select (and thereby exclude) materials and stories, and of representing faithfully but through analytical lenses, while juggling the intricacies of the author’s own positionalities and multiple levels of interpretation. In its discussion, this article makes explicit the complications of translating and transposing lived encounters and experiences into text and the written word, and unpacks the inexorable exercise of power involved in this process.

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Padamsee, H. "Accelerating Applications of RF Superconductivity—Success Stories." IEEE Transactions on Appiled Superconductivity 15, no. 2 (June 2005): 2432–39. http://dx.doi.org/10.1109/tasc.2005.847473.

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Bartell, Lawrence S. "Straying From the Beaten Path, and Other Stories About Molecules." Structural Chemistry 16, no. 1 (February 2005): 17–27. http://dx.doi.org/10.1007/s11224-005-1076-1.

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Tarján, Gabriella, and László P. Kollár. "Approximate analysis of building structures with identical stories subjected to earthquakes." International Journal of Solids and Structures 41, no. 5-6 (March 2004): 1411–33. http://dx.doi.org/10.1016/j.ijsolstr.2003.10.021.

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Books on the topic "Condensed stories"

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1903-, Whitney Phyllis A., and Reader's Digest Association, eds. Reader's digest condensed books. Pleasantville, N.Y: Reader's Digest, 1986.

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Clark, Mary Higgins. Reader's Digest condensed books. Montreal: Reader's Digest Association Limited, 1996.

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Alexandra, Ripley, and Forsyth Frederick 1938-, eds. Reader's Digest condensed books. Montreal: Reader's Digest Association, 1992.

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Collins, Anne. The wrong boy: Teen stories. Harlow: Pearson Education, 2000.

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1903-, Whitney Phyllis A., and Reader's Digest Association, eds. Best sellers: From Reader's digest condensed books. Pleasantville, N.Y: Reader's Digest Association, 1986.

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Follett, Ken. Best sellers from Reader's digest condensed books. Pleasantville, N.Y: Reader's Digest Association, 1986.

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Clark, Mary Higgins. Reader's Digest condensed books: Volume 6 1991. Pleasantville, N.Y: Reader's Digest Association, 1991.

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Adrian-Vallance, D'Arcy. Great football stories: Football Babylon. London: Penguin, 1998.

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Adrian-Vallance, D'Arcy. Great football stories: Football Babylon. Harlow: Pearson Education Ltd., 1999.

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Adrian-Vallance, D'Arcy. Great football stories: Football Babylon. Harlow: Pearson Education, 1999.

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Book chapters on the topic "Condensed stories"

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Pomeau, Yves. "Three Short Stories on Chiral Structures in Condensed Matter." In Growth and Form, 415–29. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4684-1357-1_37.

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Garrett, Steven L. "Membranes, Plates, and Microphones." In Understanding Acoustics, 283–330. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-44787-8_6.

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Abstract The restoring forces on membranes are due to the applied tension, while the restoring forces for plates are due to the flexural rigidity of the plate’s material. The transition to two dimensions introduces some features that did not show up in our analysis of one-dimensional vibrating systems. Instead of applying boundary conditions at one or two points, those constraints will have to be applied along a line or a curve. In this way, incorporation of the boundary condition is linked inexorably to the choice of coordinate systems used to describe the resultant normal mode shape functions. For two-dimensional vibrators, two indices are required to specify the frequency of a normal mode, fm,n, with the number of modes in a given frequency interval increasing in proportion to the center frequency of the interval, even though that interval remains a fixed frequency span. It is also possible that modes with different mode numbers might correspond to the same frequency of vibration, a situation that is designated as “modal degeneracy.” A membrane’s response to sound pressures provides the basis for broadband condenser microphone technology that produces signals related to the electrical properties of that capacitor and the charge stored on its plates.

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Zalasiewicz, Jan. "From the depths of the Earth." In The Planet in a Pebble. Oxford University Press, 2010. http://dx.doi.org/10.1093/oso/9780199569700.003.0008.

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The planet Theia had, like the Earth, formed early, from the mass of dust and rock-melt droplets of the accretionary disc. Theia is calculated to have been about the size of Mars, yet it was to have nothing like that planet’s longevity. Its orbit was close enough to that of Earth for collision to be certain, sooner or later. The two planets came together at something of the order of 40,000 kilometres per hour. Theia lost its separate identity over a few tumultuous minutes, and the Earth was smashed, like a grapefruit hit hard with a hammer. In that conflagration the material of the two planets, having instantly converted into boiling magma and vapour, simply merged. Theia’s core sank to join the Earth’s. Some of the outer layer of both planets splashed out into a cloud of plasma that encircled the suddenly re-formed Earth, and that cloud condensed to form a new companion to our planet—the Moon. It is a fine story, this, of the Moon’s creation through a spectacular planetary collision. It is likely true, too: though it is not certainly so, simply being the hypothesis that now best explains the character of our Earth and its satellite. Like many such stories in science, it is currently the one that best fits the evidence. It has been calculated, on the basis of these two bodies’ mass, momentum and orbit, that it would have been extraordinarily difficult for the Earth to have captured intact a stray planetary body of this size. However, holding onto a mass of ejecta flung out by impact, kept in balance by the twin, opposing forces of gravity and centrifugal force, is a more plausible means of having formed the Moon. More, this concept explains the remarkable isotopic similarity of these two bodies, generated by the intense mixing associated with impact. Mars, by contrast, has very different proportions of, say, the different isotopes of oxygen, because it formed in a different part of the Solar System, where the atoms of the original accretionary disk had been shuffled into different combinations.

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Harmes, Marcus K. "The Book: Adapting Shelley." In The Curse of Frankenstein, 47–62. Liverpool University Press, 2015. http://dx.doi.org/10.3828/liverpool/9781906733858.003.0004.

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This chapter discusses some of the deviations of the film from Mary Shelley's novel. It discusses how it was necessary for Hammer to condense plot, characters, and dialogue in order to create cinematically suitable and satisfying alternatives to the original novel, creating succinctness and cinematic impact in place of wordiness. The chapter discusses the transgressions that were made on the story's setting. In the film, Frankenstein barely sets foot outside his own front door as opposed to the journey he took to several places in the book. The chapter also discusses the transgressions made on several characters such as Victor Frankenstein, the Creature, Justine, and Elizabeth among others. There were notable changes to the portrayal of Victor Frankenstein, and the Creature, both appearing more demented than described in the novel. Justine and Elizabeth meet different fates in the film. Victor's relationships with the two women were distinctly colder to what was noted in the novel. Some characters and whole storylines were completely omitted. The chapter also discusses changes that were made to the dialogue and how speech was made to be briefer as compared to their dialogue in the novel.

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Cliff, A. D., M. R. Smallman-Raynor, P. Haggett, D. F. Stroup, and S. B. Thacker. "Technical Changes: Technology and Industry." In Infectious Diseases: A Geographical Analysis. Oxford University Press, 2009. http://dx.doi.org/10.1093/oso/9780199244737.003.0015.

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In this chapter, we examine the second of the five overlapping drivers of disease emergence and re-emergence shown in Figure II.1—technology and industry. Technological developments have yielded immeasurable benefits to society. In the field of medicine, for example, improvements in sanitation and hygiene, along with the widespread use of vaccines and antimicrobial drugs, have served to control and prevent the spread of infectious diseases. Likewise, improvements in intensive care, surgical techniques, cancer therapy, and therapies for other conditions have led to prolonged survival and an enhanced quality of life for many millions of people. But negative effects, too, have sometimes resulted from technological developments. Not least, such developments can provide, occasionally unwittingly, supportive environments for the proliferation and spread of pathogenic micro-organisms. Following Breiman (1996), Figure 5.1 identifies several key areas to these developments. The impact of technology on food production, distribution, and processing has had a substantial effect on the spread of infectious diseases, with potential contamination occurring at all stages of production and processing. The centralization of production and the increased international sourcing of foodstuffs has also had an impact on foodborne disease activity. In addition, current methods of storing foods have resulted in the emergence of foodborne pathogens; an example is provided by outbreaks of Listeria monocytogenes. This bacterium has been found in a variety of raw foods, such as uncooked meats and vegetables, as well as in processed foods that become contaminated after processing, such as soft cheeses and cold cuts from delicatessens, in unpasteurized (raw) milk, and in foods made from unpasteurized milk. Listeria thrives in refrigerated environments and, in its presence, widespread contamination of stored refrigerated food products can occur. Legionnaires’ disease is the paradigmatic disease associated with technological innovation, with cooling towers, evaporative condensers, whirlpools, spas, and showers providing temperatures which promote the survival and proliferation of the causative bacterium, Legionella pneumophila. Municipal water systems are efficient conduits for the dissemination of pathogenic micro-organisms. While most water supplies in developed countries are effectively treated in municipal water treatment facilities, the treatment may occasionally be ineffective owing to faulty procedures or the development of resistance of an organism to routine procedures.

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Yung, Yuk L., and William B. DeMore. "Mars." In Photochemistry of Planetary Atmospheres. Oxford University Press, 1999. http://dx.doi.org/10.1093/oso/9780195105018.003.0010.

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Mars has been extensively studied by a series of spacecraft since the dawn of the space age: by Mariners 4, 6, 7, and 9 (1965-1972), Mars 2 through 6 (1971-1974), and the two Viking Landers and Orbiters in 1976. The knowledge from spacecraft is supplemented by ground-based observations. The essential aspects of Mars are summarized in table 7.1. It is a smaller planet than Earth; the radius and mass are, respectively, 53% and 11% of Earth. The surface gravity is 3.71 m s~2, compared with the terrestrial value of 9.82 m s~2. The physical properties and composition of the Martian atmosphere are summarized in tables 7.1 and 7.2; isotopic composition is given in table 7.3. An example of how this knowledge is obtained is illustrated in figure 7.1, showing the mass spectrum obtained by the mass spectrometer experiment on Viking. The bulk atmosphere is composed of CO2, with small amounts of N2 and Ar and a trace amount of water vapor. Located at 1.52 AU from the sun, the mean insolation at Mars is about half that of Earth. As a result, it is a colder planet, with mean surface temperature of 220 K, too cold for water to flow on the surface in the current epoch. The lack of an ocean results in an arid and dusty climate. The obliquity of Mars is 25.2°, close to the terrestrial value of 23.5°; however, Mars has an eccentric orbit, with eccentricity of 0.093. The ratio of incident solar radiation at perihelion to aphelion is 1.45. The large seasonal variation in heating is believed to be responsible for the spectacular global dust storms that can be observed from Earth and have inspired imaginative but erroneous theories about their origin. The polar regions of Mars can be as cold as 125 K, so CO2 will condense as frost on the surface. In fact, according to the Leighton-Murray model, this is what determines the pressure of the atmosphere. Figure 7.2 shows the seasonal pressure variations at the Viking lander sites for 3.3 Mars years from 1976. Note that the magnitude of the pressure changes is of the order of 20%, compared to the maximum change of 1% on the surface of Earth.

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Conference papers on the topic "Condensed stories"

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Mansoori, Azad A., Parvaiz A. Khan, and P. K. Purohit. "Effect of geomagnetic storms of different solar origin on the ionospheric TEC." In 2ND INTERNATIONAL CONFERENCE ON CONDENSED MATTER AND APPLIED PHYSICS (ICC 2017). Author(s), 2018. http://dx.doi.org/10.1063/1.5033308.

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Perez-Bergquist, Sara, George Thompson Gray III, Stuart Maloy, Ellen Cerreta, and Osman Anderoglu. "Role of stored defects on the mechanical response of shock prestrained HT-9 Steel." In SHOCK COMPRESSION OF CONDENSED MATTER - 2011: Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter. AIP, 2012. http://dx.doi.org/10.1063/1.3686532.

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Nakano, Kimihiko, Yoshihiro Suda, and Shigeyuki Nakadai. "Self-Powered Active Vibration Control With Continuous Control Input: Application to a Cab Suspension of a Heavy Duty Truck." In ASME 1999 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/detc99/movic-8404.

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Abstract Active vibration control using regenerated vibration energy, i.e., self-powered active control, is proposed. In the self-powered active control system, vibration energy is regenerated by an electric generator, which is called an energy regenerative damper, and is stored in the condenser. An actuator achieves active vibration control using the energy stored in the condenser. The variable-value resistance whose value can be controlled by a computer is utilized to control output force of the actuator. The authors examine the performance of the self-powered active vibration control on experiments and propose to apply this system to cab suspensions of a heavy duty truck. Through experiments, it is shown that the self-powered active vibration control system has better isolation performance than a semi-active and a passive control system. Numerical simulations demonstrate better isolation performance of the self-powered active vibration control in cab suspensions of a heavy duty truck.

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Islam, Md Ashraful, Md Ashiqur Rahman, and Mohammad Alam. "Heat Transfer Performance of a Pulsated Two-Phase Loop Thermosyphon." In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-68327.

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Thermoloop is a pulsated two-phase thermosyphon (PTPT) comprising of evaporator, condenser and a liquid reservoir with associated tubing and fittings with a view to cooling electronic devices. This study presents an experimental investigation on the thermoloop to address some issues on design and heat transfer performance. The evaporator employed in this study was of 72.5 mm × 60 mm × 20 mm in dimension with inside volume of 75 cm3. The reservoir had a liquid storing capacity of 80 cm3. A copper tubular condenser was used as the heat sink having two different convection conditions. For various heat input, evaporator wall temperatures, condenser inlet and outlet temperatures and reservoir liquid column height were recorded at a regular interval. For the variation of heat input from 100 W to 250 W, the maximum temperature of the evaporator wall increased from 106°C to 112°C and the minimum temperature of evaporator wall increased from 73°C to 95°C at an evaporator fill ratio of 30%. The values of other functional parameter such as cycle time, height of liquid column in the reservoir and condenser temperature also increased with an increase in thermal load. The inclusion of a fan to cool the condenser increased the operational limit of the device from 125 W to 275 W. This thermoloop device transported heat in cyclic and pulsated manner; the amount of heat transported was as high as 250 W with a thermal resistance of 0.116 m2K/W. Furthermore, various functional parameters of the thermoloop attained a steady value after 5 to 6 heat transport cycles.

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Saleh, Ahmad, and Jayanta Kapat. "Comprehensive Reduction of Thermal Resistance in Air Cooled Condensers." In ASME 2015 Power Conference collocated with the ASME 2015 9th International Conference on Energy Sustainability, the ASME 2015 13th International Conference on Fuel Cell Science, Engineering and Technology, and the ASME 2015 Nuclear Forum. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/power2015-49363.

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Restriction on water consumption is becoming an increasing problem for the power generation industry. As an alternative both to once-through cooling and to surface condenser/wet-cooling tower combination, utility companies and equipment manufacturers are considering, and even implementing, air-cooled condenser (ACC). However, the industry is quite reluctant to switch over to ACC for three important reasons: (a) lower power output, (b) higher capital cost, and (c) larger physical foot-print, all because of the same reason — it is not as efficient to transfer heat from condensing steam to air as it is to transfer to water. In other words, overall thermal resistance from condensing steam to the ambient air is significantly higher than to cooling water. To get a clear and full understanding of the heat transfer process occur in air-cooling condenser, Detailed mathematical equations were derived to model the heat transfer process through the fined-tubes of the ACC. The total thermal resistance model was analyzed and investigated to identify the design components with highest affect in the process. The paper proposes a viable cooling system based on novel heat pipe technology which addresses these problems. This technology employs boiling as the means to store and transfer heat energy. A detailed mathematical set of equations was derived to model the heat pipe thermal resistance. A comparison of the heat transfer performances of the ACC technology and the proposed method is presented. The proposed cooling system suggests a solution for each of the three components of the thermal resistance, the super-hydrophobic coating of the steam ducts internal surfaces increased the condensing heat transfer rate by an order of magnitude, the proposed design of the heat pipes improved the external heat transfer, and the installation mechanism improves the fin efficiency by eliminating the contact resistance between steam duct and the heat pipe.

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Hoenig, Sean H., Richard W. Bonner, Joshua M. Charles, Chien-Hua Chen, and Fangyu Cao. "Prototype Results for a Salt Hydrate PCM Thermal Energy Storage System." In ASME 2019 Heat Transfer Summer Conference collocated with the ASME 2019 13th International Conference on Energy Sustainability. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/ht2019-3403.

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Abstract Air-cooled condenser systems incur a high cost of operation during peak power demand due to hot ambient temperatures, resulting in poor thermal performance. To shift the thermal performance of air-cooled condenser systems closer to that of wet cooling towers, a salt hydrate phase change material (PCM)-based supplemental thermal energy storage system is proposed. Low-grade waste heat from saturated steam in a power generation cycle is stored in a “cold” sink of PCM during the day and rejected at night during cooler ambient air temperatures. Passive loop thermosyphons are used to transfer heat in and out of the PCM heat exchanger. A 30MJ prototype was designed, fabricated, and tested to demonstrate the longevity of the system. Repeated thermal cycling tests have been completed for 50 cycles. The measured latent heat capacity results have shown that the salt hydrate solution segregates into different hydration levels over time but can stabilize by remixing the bulk solution.

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Aridon, G., A. Al Majid, L. Blanchard, D. Re´mond, and R. Dufour. "A Self-Deployment Hexapod Model for a Space Application." In ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/detc2007-35299.

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This paper presents an efficient simulation tool for predicting a self deployment of an on-board deployable hexapod based on the release of stored strain energies provided by six tape-spring actuators. Six restoring force models describe their hysteretic behavior. A formulation of a direct dynamic model developed with a Lagrangian approach is achieved. Furthermore, tensor representation is used to condense and simplify the calculation of Lagrangian partial derivatives. Results are compared with a numerical model that performs the recursive Newton-Euler technique. Finally, the impact of the excitation of the base on the deployment performances is evaluated taking advantage of the proposed restoring force models.

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Upshaw, Charles R., Joshua D. Rhodes, and Michael E. Webber. "Modeling a Combined Energy-Water Storage System for Residential Homes and Analyzing Water Storage Tank Size." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-63967.

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Air conditioning systems (AC systems) are the primary driver of summer electricity use and peak power demand in residential homes in Texas, mostly due to the refrigerant compressor in the condenser unit. The power demand for a residential AC compressor is on the order of kilowatts. Peak power demand from residential AC systems could be reduced by means of pre-cooling a thermal storage reservoir, which can be used as a heat sink instead of the air-cooled outdoor condenser that is subject to ambient conditions. The concept of thermal storage is not new, and is in widespread use in large-scale HVAC systems for the commercial and industrial sectors. However, residential thermal storage systems, while available, are not widespread due to high costs relative to the costs of the AC system. This paper discusses the development of a simplified thermodynamic model of a water-based sensible thermal storage reservoir for reducing peak AC compressor loads, and determines optimal tank sizing based on a few key design parameters. The motivation behind this project is the idea of utilizing a large water reservoir that could be on-site for other purposes already, specifically large rainwater collection systems. Such a combined energy/water storage configuration might increase the cost effectiveness of both a thermal storage system and a rainwater collection system by means of shared costs and avoided energy and water expenses. The system configuration consists of a typical direct expansion residential air conditioning system with a typical air-cooled condenser unit, but with an additional thermal storage condenser/evaporator heat exchanger connected into the refrigerant lines with reconfigurable flow paths and solenoid valves to control the discharging and recharging of the thermal reservoir. The large volume of stored water acts as a lower temperature thermal reservoir for the secondary condenser. The lower temperature and better heat transfer capabilities of water improve operating efficiency and reduce power consumption when used instead of the air-cooled condenser during the hottest hours of the day. The system model was evaluated using cooling load outputs for a simulated 1800 square foot home in Austin, Texas based on weather data from summer 2011, which was a record hot summer that stressed the Texas electricity grid to its limits. Preliminary analysis based on a simplified model of the system, along with the specified model parameters, suggests that thermal storage systems would be on the order of several thousand gallons, which corresponds to that of a large rainwater collection system. Additionally, the analysis suggests that power demand reduction during peak is likely the primary benefit of the system, with an average reduction on the order of 30–70% less than the system without storage, depending on operating parameters. However, total energy consumption could be either slightly higher or lower than the baseline, depending on a variety of factors such as diurnal temperature swing, discharge/recharge control, compressor efficiency, and tank size.

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Du, Yilin, Jan Muehlbauer, Jiazhen Ling, Vikrant Aute, Yunho Hwang, and Reinhard Radermacher. "Rechargeable Personal Air Conditioning Device." In ASME 2016 10th International Conference on Energy Sustainability collocated with the ASME 2016 Power Conference and the ASME 2016 14th International Conference on Fuel Cell Science, Engineering and Technology. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/es2016-59253.

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A rechargeable personal air-conditioning (RPAC) device was developed to provide an improved thermal comfort level for individuals in inadequately cooled environments. This device is a battery powered air-conditioning system with the phase change material (PCM) for heat storage. The condenser heat is stored in the PCM during the cooling operation and is discharged while the battery is charged by using the vapor compression cycle as a thermosiphon loop. The conditioned air is discharged towards a single person through adjustable nozzle. The main focus of the current research was on the development of the cooling system. A 100 W cooling capacity prototype was designed, built, and tested. The cooling capacity of the vapor compression cycle measured was 165.6 W. The PCM was recharged in nearly 8 hours under thermosiphon mode. When this device is used in the controlled built environment, the thermostat setting can be increased so that building air conditioning energy can be saved by about 5–10%.

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Avila, Raudel O., Md S. Islam, and Pavana Prabhakar. "Thermal Gradient on Hybrid Composite Propellant Tank Materials at Cryogenic Temperatures." In ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-65727.

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Cryogenic tanks are devices that are commonly used to store extremely low temperature fluids, usually in their liquid state. Cryogenic fuel tanks carry cryogenic propellants such as liquid oxygen, liquid methane or liquid hydrogen, at subfreezing temperatures in its condensed form in order to generate highly combustible liquids. This type of tank is exposed to an extremely cold temperature in its interior and to ambient temperature on its external surface resulting in large temperature gradient across the thickness of the wall. In this paper, hybrid textile composites with carbon and Kevlar® fabric are explored as means to reduce the influence of thermal gradient in order to enhance the material performance when cryogenic propellant fuels are stored in spacecraft applications. Previous initial studies of tensile and flexural tests have indicated that carbon and Kevlar® textile composites are suitable materials for cryogenic temperatures. The pristine mechanical properties of carbon composites changed within a maximum of 3–4% after initial cryogenic exposure during the fueling stage, while 17% for Kevlar® composites. Computational models of hybrid carbon-Kevlar® composites were subjected to cryogenic temperature (77 K) to investigate the effect of exposure for extended periods and to aid in the design of optimum layups for the same. Six optimal combinations were selected that resulted in low interface stresses and lower number of peak stresses through the thickness of the laminate. These layups were deduced to perform better compared to other layups due to lesser susceptibility to delamination type failure upon cryogenic exposure. Experimental investigation of the chosen hybrid composites has revealed few optimum combinations for use in tanks. As a next step, computational analysis of cryogenic exposure to only one surface of hybrid composites was performed to simulate the composite wall containing the liquid fuel. Based on the suggestions from the computational models, experiments to determine optimum designs of the composite wall were conducted. An ABS plastic insulating holder was computationally designed and 3D printed to hold the specimens such that only one surface is exposed to LN2. A total of eight composite layups were exposed to liquid nitrogen using the plastic holder to study their response to thermal gradient cryogenic exposure. Based on the results obtained computationally and supported by experiments, optimum hybrid layups of composites to sustain cryogenic exposure were determined.

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