THE DESIGN AND ANALYSIS OF EXPERIMENTS. By Oscar Kempthorne. New York, John Wiley and Sons, Inc., 1952. 631 pp. $8.50. This book by a teacher of statistics (as well as a consultant for \"experimenters\") is a comprehensive study of the philosophical background for the statistical design of experiment. It is necessary to have some facility with algebraic notation and manipulation to be able to use the volume intelligently. The problems are presented from the theoretical point of view, without such practical examples as would be helpful for those not acquainted with mathematics. The mathematical justification for the techniques is given. As a somewhat advanced treatment of the design and analysis of experiments, this volume will be interesting and helpful for many who approach statistics theoretically as well as practically. With emphasis on the \"why,\" and with description given broadly, the author relates the subject matter to the general theory of statistics and to the general problem of experimental inference. MARGARET J. ROBERTSON

The Design and Analysis of Experiments

An overview on the light alcohol fuels in diesel engines

Refrigeration system is one of the biggest reason of the expanding pattern of energy consumption, thus, energy saving is one of the best approach to overcome this issue. Nanofluids show extraordinary potential in upgrading the thermodynamic and mechanical performance of the refrigeration system. In the refrigeration system, the effort to improve the efficiency of the system is by introducing nanoparticles in refrigerant (nanorefrigerant) and in lubricant (nanolubricant). In this paper, a comprehensive review is carried out to investigate the impact of nanorefrigerant and nanolubricant on energy saving. The overview consists of properties enhancement of nanorefrigerant and nanolubricant, tribological performance, heat transfer enhancement, performance in heat exchanger, improvement in refrigeration system and pressure drop characteristic. The previous results showed that the best energy saving with 21% less energy used was with the use of 0.5% volume ZnO-R152a refrigerant nanolubricant. Both the suction pressure and discharge pressure were brought down by 10.5% when nanorefrigerant was utilized. The evaporator temperature was lessened by 6% with the utilization of nanorefrigerant. The replacement of R134a with R152a gives a green and clean environment, with zero ozone depleting potential (ODP) and less global warming potential (GWP). The performance of refrigeration system was significantly enhanced.

Potential of Nanorefrigerant and Nanolubricant on Energy Saving in Refrigeration System – A Review

Forced convection of nanofluids in an extended surfaces channel using lattice Boltzmann method

Pool boiling heat transfer to CuO-H2O nanofluid on finned surfaces

Applications of nanorefrigerant and nanolubricants in refrigeration, air-conditioning and heat pump systems: A review

In this study, impingement air cooling mode of forced convection is adopted for heat dissipation from high power electronic devices in association with a parallel fin heat sink. Components of airflow velocity in channel of the extended surfaces are presented and discussed. Pressure drop and other thermal performances are analyzed numerically by a C++ developed code based on finite differences schemes. Thermal and hydraulic characterization of heat sink under air-forced convection cooling condition are studied. The hydraulic parameters including velocity profiles, distribution of static pressure, and pressure drop through the heat sink are analyzed and presented schematically. Furthermore, the thermal characteristic of the aluminum approach of cooling is studied by utilizing the contours of the three-dimensional temperature distributions through the fins, base heat sink and the heat sink body. The performance of the proposed model computed by the numerical calculation is high compared to current heat sinks as expected of the previous studies.

Fluid Flow and Thermal Characteristics of a Minichannel Heat Sink with Impinging Air Flow

Received: 20 July 2018 Accepted: 24 December 2018 In this study, experimental investigation of thermal and aerodynamic performances of a rectangular mini-channel heat sink subjected to an impinging air jet was carried out with the aim to improve the cooling performance of personal computer CPUs. The influence of the impinging distance on the velocity profile, the pressure drop, the case temperature, the thermal resistance, and the heat transfer coefficient are studied. Moreover, the effect of the positioning of the microprocessor (heat source) on the thermal performance was investigated. The results show a ratio \"height jet/diameter\" Y/D=0.606 offer a better cooling, and a longitudinal displacement of the heat source (central processor unit) 10 mm from the original position (center) improve the cooling performance. The enhancement rate was in a range of 10% compared to the initial position (central position before shifting the source).

http://iieta.org/sites/default/files/Journals/IJHT/36.04_20.pdf

M’hamed Beriache

Papers

Applications of nanorefrigerant and nanolubricants in refrigeration, air-conditioning and heat pump systems: A review

Fluid Flow and Thermal Characteristics of a Minichannel Heat Sink with Impinging Air Flow

Experimental study of aero-thermal heat sink performances subjected to impinging air flow

Numerical simulation of fluid flow and heat transfer in rotating channels using parallel lattice Boltzmann method

Experimental investigation on controlled cooling by coupling of thermoelectric and an air impinging jet for CPU