Results 261 to 270 of about 167,172,128 (305)
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Coefficient of performance of Stirling refrigerators
European Journal of Physics, 2017Abstract Stirling coolers transfer heat in or out of the working fluid during all four stages of their operation, and their coefficient of performance depends on whether the non-isothermal heat exchanges are performed reversibly or irreversibly. Both of these possibilities can in principle be arranged. Notably, if the working fluid is
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Coefficients Alpha for the Tactual Performance Test Trials
Perceptual and Motor Skills, 2001Given the severe assumptions needed for use of the Spearman-Brown reliability formula, the Tactual Performance Test trials data described in 2000 were reanalyzed using coefficient alpha. These values are considered the best estimate of the population reliability for the trials.
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Coefficient of Performance of Thermoelectric Cooling on Nanofluids
Applied Mechanics and Materials, 2013This paper reports on experimental comparisons of coefficient of performance (COP) of a thermoelectric coolingsystem which cooled the hot side of the TEC by water (wc), ethylene glycol (egc) and nanofluids (nfc) The nanofluids is composed of ethylene glycol with silver nano(35 nm).The TEC was composed of the TE cooling modules, heat exchanger, and the ...
Somchai Maneewan +2 more
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Coefficient of performance of an ideal absorption cycle
Applied Energy, 1983Abstract The conventional expression for the coefficient of performance (COP) of an ideal absorption cycle is misleading and a correct expression is derived. The deviation in the COP values from these two expressions increases with the increase in the difference in the absorber and condenser temperatures.
S.C. Kaushik, C.S. Tomar, S. Chandra
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Equine blood oxygenation as a coefficient of performance
Timiryazev Biological JournalIn horse breeding, it is important to introduce affordable methods for assessing the potential of the horse’s body to perform work of varying severity and in different terrain conditions (altitude, landscape features, type of work). The applicability of the method of dosing the load of working horses in highland conditions has been established on the ...
I. V. Tarabrin, V. V. Usenko
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Coefficient of performance of multistage absorption cycles
International Journal of Refrigeration, 1987Abstract A method is presented by which the coefficients of performance of advanced absorption cycles can be calculated very quickly if the efficiencies of single-stage heat pumps and heat transformers are known. The method provides detailed results for the heat input or output of the individual exchange units. These values can be used as a basis for
F. Ziegler, G. Alefeld
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Coefficient of Performance Computation of a Lecture Hall
2021With improved living standards and rising ambient temperatures, human comfort is the most significant metric in the current environment. Electric air conditioning equipment is not recommended for large structures since it consumes a lot of electricity and has a short lifespan.
Misra, Abhinav +2 more
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The coefficient of performance of an ideal air conditioner
International Journal of Refrigeration, 2009In this paper we present the expression for the COP of an ideal air conditioner in terms of the temperature of air at the inlet and outlet of the air conditioner.
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On the performance of coefficient of variation control charts in Phase I
Quality and Reliability Engineering International, 2018AbstractControl charts are mainly carried out in 2 interconnected phases: Phase I (retrospective phase) and Phase II (monitoring phase). Phase I uses a stable historical sample to establish control limits that will be used later in Phase II. The preciseness of the control limits obtained from Phase I can greatly affect the performance of control charts
Abdaljbbar B. A. Dawod +2 more
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Significance of heat pump coefficient of performance
Transactions of the American Institute of Electrical Engineers, Part II: Applications and Industry, 1959This paper deals with the load aspects and economic aspects of three types of residential heat pump systems which employ supplementary heat sources. It contains illustrations of their load characteristics over a wide range of annual COP (coefficient of performance), depicts relationships of the relative costs to serve these loads from long-range and ...
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