Results 11 to 20 of about 28,453 (289)
Physical Review Letters, 2006 Onsager symmetry implies that a Brownian motor, driven by a temperature gradient, will also perform a refrigerator function upon loading. We analytically calculate the corresponding heat flux for an exactly solvable microscopic model and compare it with molecular dynamics simulations.
Van den Broeck, C., Kawai, R.
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Alternative refrigerants and refrigeration cycles for domestic refrigerators [PDF]
, 1992 This project initially focused on using nonazeotropic refrigerant mixtures (NARMs) in a two-evaporator refrigerator-freezer design using two stages of liquid refrigerant subcooling. This concept was proposed and tested in 1975. The work suggested that the concept was 20% more efficient than the conventional one-evaporator refrigerator-freezer (RF ...
Sand, J. R. +2 more
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Physical Review E, 2010 We study a refrigerator model which consists of two $n$-level systems interacting via a pulsed external field. Each system couples to its own thermal bath at temperatures $T_h$ and $T_c$, respectively ($θ\equiv T_c/T_h<1$). The refrigerator functions in two steps: thermally isolated interaction between the systems driven by the external field and ...
Allahverdyan, Armen E. +2 more
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Evaluation of Virtual Refrigerant Mass Flow Sensors [PDF]
, 2012 Refrigerant mass flow rate is an important measurement for monitoring equipment performance and enabling fault detection and diagnostics. However, a traditional mass flow meter is expensive to purchase and install. A virtual refrigerant mass flow sensor (
Kim, Woohyun, Braun, James E.
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An Experimental Study of Refrigerant Desorption from a Refrigerant-Oil Mixture Subjected to Rapid Depressurization [PDF]
, 2012 This paper deals with the experimental assessment of refrigerant desorption leading to foam formation in R-134a/POE oil mixtures undergoing controlled depressurization.
Barbosa Jr., Jader +2 more
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Energies, 2021 This paper reports the results of heat transfer during refrigerant flow in rectangular mini-channels at stationary conditions. The impacts of selected parameters on boiling are discussed, i.e., thermal and flow parameters, dimensions and orientation of ...
Magdalena Piasecka, Kinga Strąk
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Extension of a Virtual Refrigerant Charge Sensor [PDF]
, 2012 The primary goal of the work described in this paper was to evaluate and extend a virtual refrigerant charge sensor (VRC) for determining refrigerant charge for equipment having variable-speed compressors and fans.
Kim, Woohyun, Braun, James E.
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A Capillary Tube-Refrigerant Charge Design Methodology for Household Refrigerators-Part II: Equivalent Diameter and Test Procedure [PDF]
, 2012 In the first part of this work an experimental apparatus was designed and constructed to map the energy consumption of a household refrigerator subjected to several combinations of refrigerant charge and expansion restriction.
Melo, Claudio, Boeng, Joel
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Study of R161 Refrigerant for Residential Air-conditioning Applications [PDF]
, 2012 In order to investigate the feasibility of R161 applied in residential air conditioner, the thermodynamic performance and comprehensive theoretical thermodynamic cycle of R161, R22 and R290 under various air-conditioner operating condition were carried ...
Zhuang, Rong +3 more
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Approximate Thermal Calculation of the Superheated Steam Condenser of Heat Pumps
Известия высших учебных заведений и энергетических объединенний СНГ: Энергетика, 2022 A comparative analysis of the methods of approximate thermal calculation of the superheated steam condenser of the steam compression heat pump of the heat supply system is presented.
V. I. Volodin, S. V. Zditovetskaya
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