497
497
Aug 2, 2013
08/13
by
Morrison, Graham; McLinden, Mark O.
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eye 497
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434
434
Selected thermodynamic properties for mixtures of R-32 (Difluoromethane), R-125 (Pentafluoroethane), R-134A (1,1,1,2-Tetrafluoroethane), R-143A (1,1,1-Trifluoroethane), R-41 (Fluoromethane), R-290 (Propane), and R-744 (Carbon Dioxide)
Aug 2, 2013
08/13
by
Holcomb, Cynthia D.; Magee, Joseph W.; Scott, Jennifer L.; Outcalt, Stephanie L.; Haynes, William M.
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eye 434
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29
29
Feb 21, 2017
02/17
by
Buschmeier, Martin; Mulroy, William; Didion, David
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eye 29
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219
219
Aug 2, 2013
08/13
by
Bruno, Thomas J.
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eye 219
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comment 0
5
5.0
May 13, 2022
05/22
by
Downing, Ralph C
texts
eye 5
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xii, 402 p. : 25 cm
Topics: Refrigerants, Fluorocarbons
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54
Sep 30, 2010
09/10
by
Illinois. Dept. of Energy and Natural Resources. Office of Research and Planning
texts
eye 54
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"Principal investigators: David P. Kuhaneck, Charles A. Licht, Thomas J. Marciniak."
Topics: Chlorofluorocarbons, Refrigerants
29
29
May 25, 2017
05/17
by
Kedzierski, Mark A.
texts
eye 29
favorite 0
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Topics: Refrigerants--Additives, Refrigerants--Thermal properties, Boiling-points
World is highly concern about the exponential growth of global warming and energy demand, due to use of various refrigerants. Refrigerants used in VCRS are the most influencing agent in global warming & it is very important to select those refrigerants that have low impact on ozone layer and environment. This paper is a comprehensive review of experimental & theoretical studies of VCRS system using various refrigerants and their influence on atmosphere. From this paper we can also...
Topics: VCRS, ODP, GWP, Alternative refrigerants & Blended refrigerants
150
150
May 25, 2017
05/17
by
Grosshandler, William; Donnelly, Michelle; Womeldorf, Carole
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eye 150
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Topic: Refrigerants--Flammability
"CAS no. 75-69-4."
Topics: Carcinogens, Halocarbons, Refrigerants, Halocarbons -- Toxicology, Refrigerants -- Toxicology
136
136
Jan 17, 2017
01/17
by
Domanski, Piotr A.
texts
eye 136
favorite 0
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Topics: Heat exchangers, Refrigerants.
110
110
Jun 22, 2017
06/17
by
Choi, Jun-Young; Kedzierski, Mark A.; Domanski, Piotr A.
texts
eye 110
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Topic: Refrigerants -- Thermomechanical properties
103
103
Oct 5, 2015
10/15
by
Trost, Christopher S
texts
eye 103
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AD-A327 532
Topic: ATTACK SUBMARINES,REFRIGERANTS
AD-A327 532
Topics: ATTACK SUBMARINES, REFRIGERANTS
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99
Oct 5, 2015
10/15
by
Lloyd, John R.;Marto, P. J.
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eye 99
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Title from cover
Topic: REFRIGERANTS.,OIL CONTAMINATION.,PHASE TRANSFORMATIONS.
Title from cover
Topics: REFRIGERANTS., OIL CONTAMINATION., PHASE TRANSFORMATIONS.
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120
Sep 27, 2010
09/10
by
Tomczyk, John; Nott, Joe; Shaw, Dick; AC & R Safety Coalition
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eye 120
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"AC & R Safety Coalition"--Cover
Topics: Refrigerants, Refrigeration and refrigerating machinery
According the protocols devised to curtain the environmental pollution as well as to maintain eco-friendly surroundings and to improve the thermo physical properties of the refrigeration system, it is very important to look for energy efficient and safe refrigerants so as to improve the effect of refrigeration and co-efficient of performance. Nanoparticles and Nano fluids have grabbed the attention of present scenario with its enhanced properties and its potential applications like high heat...
Topics: Co-efficient of Performance, thermo physical, refrigerants, process variables, Nano refrigerants,...
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121
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This paper presents experimental analysis of newly designed conical rotary compressor prototype with refrigerant R134a and two hydrocarbon mixtures of propane and isobutane in varying proportion. The experimental tests are carried out for maximum pressure ratio and maximum cooling capacity. Compressor tests are also conducted for varying pressure ratios. For each test, the refrigerant mass flow rate, electrical power consumption, and the suction and discharge temperature and pressure are...
Topics: Comparison, Conical Compressor, Performance, Refrigerants, Rotary
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72
May 25, 2017
05/17
by
Kedzierski, Mark A.; Goncalves, J. M.
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eye 72
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Topics: Refrigerants--Thermal properties, Tubes--Fluid dynamics
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53
Feb 21, 2017
02/17
by
Pannock, Jürgen; Didion, David A.Pannock, Jürgen; Didion, David A.
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eye 53
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Topics: Refrigerants, Fluorocarbons, Heat pumpsRefrigerants, Heat pumps
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61
Jun 22, 2017
06/17
by
Yashar, David A.
texts
eye 61
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comment 0
Topics: Refrigerants -- Thermomechanical properties -- Measurement, Pressure -- Measurement
40
40
Jun 22, 2017
06/17
by
Kedzierski, M. A.
texts
eye 40
favorite 0
comment 0
Topics: Condensation, Refrigerants -- Thermal properties, Surface active agents
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83
Jun 22, 2017
06/17
by
Palmer, Sheila C.; Payne, W. Vance, II; Domanski, Piotr A.
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eye 83
favorite 0
comment 0
Topics: Heat exchangers -- Testing, Refrigerants -- Testing, Evaporation, Condensation
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32
Jun 22, 2017
06/17
by
Kedzierski, Mark A.
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eye 32
favorite 0
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Topics: Condensation, Refrigerants -- Thermal properties, Surface active agents
The aim of the present work is to study the effects of refrigeration system parameters namely, Evaporating temperature (T eva ), Condensing temperature (T con ) and mass of the refrigerant charge used (m), on the performance of the system using mathematical models. Three factors and two levels factorial technique were employed for the development of mathematical models to conduct the required experiments. Based on these mathematical models developed for predicting the values of responses, the...
Topics: Refrigeration System Parameters, Mathematical Models, MINITAB Software & Refrigerants
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57
Jun 22, 2017
06/17
by
Payne, W. Vance, II; Domanski, Piotr A.; Muller, Jaroslaw
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eye 57
favorite 1
comment 0
Topics: Heat pumps -- Thermodynamics -- Testing, Refrigerants -- Testing, Hydrocarbons -- Testing
207
207
texts
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As per Montreal protocol, R134a has been suggested as an alternate refrigerant to R12. R134a is not miscible in mineral oil. Alternatively synthetic oils are recommended. As R134a can cause high global warming, its usage needs to be controlled as per the Kyoto protocol. On the other hand Hydro Carbon refrigerants do have flammability issues and safety standards that limit the usage of pure HC refrigerants in domestic appliances. Because of the above factors, safe conversion of existing R134a...
Topics: : Refrigerants, Global Warming, Ternary Mixture, Propane, Isobutane, R134a
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51
Jun 22, 2017
06/17
by
Kedzierski, Mark A.
texts
eye 51
favorite 0
comment 0
Topics: Refrigerants -- Thermal properties, Surface active agents, Heat-transfer media
38
38
Mar 28, 2017
03/17
by
Kedzierski, Mark A.; Kaul, Michael P.
texts
eye 38
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comment 0
Topics: Refrigerants--Thermal properties, Nucleate boiling, Synthetic lubricants, Nusselt number
107
107
Jun 22, 2017
06/17
by
Hamilton, L. J.; Kedzierski, M. A.; Kaul, M. P.
texts
eye 107
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Topics: Refrigerants -- Thermal properties, Tubes -- Fluid dynamics, Fluid dynamic measurements
Journal of Research of the National Institute of Standards and Technology
Topics: ethenes, alternative refrigerants, brominated chlorinated ethanes, propynes, refractive index
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49
May 25, 2017
05/17
by
Kedzierski, Mark A.; Bruno, Thomas J.; O'Neill, Matt B.
texts
eye 49
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Topics: Refrigerants--Thermal properties, Heat-transfer media, Lubrication and lubricants--Measurement
Mendeley Climate Change Library
96
96
Jul 6, 2019
07/19
by
Naeem Abas; Ali Raza Kalair; Nasrullah Khan; Aun Haider; Zahid Saleem; Muhammad Shoaib Saleem
texts
eye 96
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Halogenated hydrocarbons with high ozone depletion potential (ODP) were banned under Montreal Protocol (1987) due to their detrimental effects on ozone layer that shields the planet against ultraviolet radiations. The greenhouse gases (GHG) used in modern refrigeration, air conditioning, and heat pumping systems, are under Kyoto Protocol (1997)’s time-barred permission period. In order to reduce the depletion of ozone and reverse the climate change effects, the European Union legislation...
Topics: Global Warming Potential (GWP), Natural refrigerants, Ozone Depletion Potential (ODP)
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58
Jun 22, 2017
06/17
by
Kedzierski, Mark A.
texts
eye 58
favorite 0
comment 0
Topics: Heat-transfer media, Boiling-points, Lubrication and lubricants -- Density, Refrigerants,...
48
48
Jun 22, 2017
06/17
by
Kedzierski, Mark A.
texts
eye 48
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Topics: Refrigerants -- Additives, Heat -- Transmission -- Measurement, Lubrication and lubricants --...
1,731
1.7K
Jul 11, 2010
07/10
by
NON
texts
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A compilation is presented of papers reported at the 1975 Ride Quality Symposium held in Williamsburg, Virginia, August 11-12, 1975. The symposium, jointly sponsored by NASA and the United States Department of Transportation, was held to provide a forum for determining the current state of the art relative to the technology base of ride quality information applicable to current and proposed transportation systems. Emphasis focused on passenger reactions to ride environment and on implications...
Topics: AQUEOUS SOLUTIONS, ENTROPY, LITHIUM COMPOUNDS, CONCENTRATION (COMPOSITION), ENTHALPY, REFRIGERANTS,...
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10.0
texts
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164 pages : 28 cm
Topics: Fluorocarbons, Refrigerants, Refrigerants -- Environmental aspects -- Examinations, questions, etc....
The present invention comprises a refrigerant mixture consisting of a first mole fraction of 1,1,1,2-tetrafluoroethane (R134a) and a second mole fraction of a component selected from the group consisting of a mixture of CHClFCF.sub.3 (R124) and CH.sub.3 CClF.sub.2 (R142b); a mixture of CHF.sub.2 CH.sub.3 (R152a) and CHClFCF.sub.3 (R124); a mixture of CHF.sub.2 CH.sub.3 (R152a) and CH.sub.3 CClF.sub.2 (R142b); and a mixture of CHClFCF.sub.3 (R124), CH.sub.3 CClF.sub.2 (R142b) and CHF.sub.2...
Topics: NASA Technical Reports Server (NTRS), REFRIGERANTS, FLUORINE COMPOUNDS, PATENTS, Jones, Jack A....
Topics: DTIC Archive, BERRY, H. W., SYRACUSE UNIV NY, *ELECTRONS, *REFRIGERANTS, ENERGY, METALS, ATOMS
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114
Mar 28, 2017
03/17
by
Kao, James Y.
texts
eye 114
favorite 0
comment 0
Topics: Refrigeration and refrigerating machinery--Maintenance and repair, Air conditioning--Equipment and...
65
65
Jun 22, 2017
06/17
by
Sawant, Nitin N.; Kedzierski, Mark A.; Brown, J. Steven
texts
eye 65
favorite 0
comment 0
Topics: Heat-transfer media, Boiling-points, Lubrication and lubricants -- Density, Nusselt number,...
The present invention comprises a refrigerant mixture having two halocarbon components. The first component is present in a mole fraction of about 0.7 to less than 1.0 while the second component is present in a mole fraction of more than 0.0 to about 0.3. The first component is CH.sub.2 FCF.sub.3. The second component can be CHClFCF.sub.3, CH.sub.3 CClF.sub.2, a mixture of CHClFCF.sub.3 and CH.sub.3 CClF.sub.2, a mixture of CHF.sub.2 CH.sub.3 and CHClFCF.sub.3, a mixture of CHF.sub.2 CH.sub.3...
Topics: NASA Technical Reports Server (NTRS), FLUORINE COMPOUNDS, HALOCARBONS, REFRIGERANTS, PATENTS,...
A refrigerant and a process of formulating thereof that consists of a mixture of a first mole fraction of CH.sub.2 FCF.sub.3 and a second mole fraction of a component selected from the group consisting of a mixture of CHClFCF.sub.3 and CH.sub.3 CClF.sub.2 ; a mixture of CHF.sub.2 CH.sub.3 and CH.sub.3 CClF.sub.2 ; and a mixture of CHClFCF.sub.3, CH.sub.3 CClF.sub.2 and CHF.sub.2 CH.sub.3.
Topics: NASA Technical Reports Server (NTRS), FLUORINE COMPOUNDS, FORMULATIONS, REFRIGERANTS, PATENTS,...
In planning for a return mission to the Moon, NASA aimed to improve the thermal control systems that keep astronauts comfortable and cool while inside a spacecraft. Goddard Space Flight Center awarded a Small Business Innovation Research (SBIR) contract to Mainstream Engineering Corporation, of Rockledge, Florida, to develop a chemical/mechanical heat pump. IDQ Inc., of Garland, Texas, exclusively licensed the technology and incorporates it into its line of Arctic Freeze products for automotive...
Topics: NASA Technical Reports Server (NTRS), AIR CONDITIONING, TEMPERATURE CONTROL, REFRIGERANTS,...
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330
May 23, 2011
05/11
by
Rajpal, Sandeep; Rhee, DoJun; Lin, Sh
texts
eye 330
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In this paper, we will use the construction technique proposed in to construct multidimensional trellis coded modulation (TCM) codes for both the additive white Gaussian noise (AWGN) and the fading channels. Analytical performance bounds and simulation results show that these codes perform very well and achieve significant coding gains over uncoded reference modulation systems. In addition, the proposed technique can be used to construct codes which have a performance/decoding complexity...
Topics: COMBUSTION, RECLAMATION, CHLOROCARBONS, REFRIGERANTS, GAS MIXTURES, TRANSONIC WIND TUNNELS,...
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5.0
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x, 124 pages : 28 cm
Topics: Chlorofluorocarbons -- Environmental aspects, Ozone-depleting substances -- Environmental aspects,...
Unable to solve their engineering problem with a rotor in their Orbital Vane product, DynEco Corporation turned to Kennedy Space Center for help. KSC engineers determined that the compressor rotor was causing a large concentration of stress, which led to cracking and instant rotor failure. NASA redesigned the lubrication system, which allowed the company to move forward with its compressor that has no rubbing parts. The Orbital Vane is a refrigerant compressor suitable for mobile air...
Topics: NASA Technical Reports Server (NTRS), TECHNOLOGY UTILIZATION, COMPRESSOR ROTORS, LUBRICATION...
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49
Jun 22, 2017
06/17
by
Payne, W. Vance, II; Silk, Eric A.; Domanski, Piotr A.
texts
eye 49
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Topics: Heat pumps -- United States -- Design, Heat pumps -- United States -- Thermodynamics, Heat...
Chiller plant owning and operating costs represent substantial investments at Fort Hood, Texas. Primary objectives of this work are to evaluate the performance of major plants and associated distribution systems, and to identify relevant energy conservation opportunities (ECOs). Significant effort was expended to gather information and document the performance of plant cooling equipment. Data were obtained from site surveys, discussions with vendors and manufacturers, and reviews of previous...
Topics: DTIC Archive, Cler, Gerald L., CONSTRUCTION ENGINEERING RESEARCH LAB (ARMY) CHAMPAIGN IL, *ENERGY...
