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Dengjia Wang

Bio: Dengjia Wang is an academic researcher from Xi'an University of Architecture and Technology. The author has contributed to research in topics: Thermal comfort & Thermal energy storage. The author has an hindex of 20, co-authored 101 publications receiving 1131 citations.

Papers published on a yearly basis

Papers
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Journal ArticleDOI
TL;DR: In this article, an experimental investigation on collector efficiency and pressure drop in a solar air heater with multiple s-shaped ribs with gaps as the roughness element is presented, which can enhance the heat transfer between air and heat absorber plate sufficiently.

103 citations

Journal ArticleDOI
TL;DR: In this paper, the authors provide a comprehensive literature review to identify, classify, evaluate and analyze the performance of different methodologies, models and energy systems for isolated areas, and effective information could be provided to support decision-making toward to appropriate energy models and systems for isolating areas with different scales and demands.
Abstract: The energy systems of isolated areas are different from the stable energy systems of mainland areas. The particularity of isolated areas creates more risks for their energy systems planning, and the isolated areas can be considered to be a more specific analysis target than mainland areas. Various energy models and systems have been developed and applied in isolated areas. The major objective of this study is to provide a comprehensive literature review to identify, classify, evaluate and analyze the performance of different methodologies, models and energy systems for isolated areas. Therefore, effective information could be provided to support decision-making toward to appropriate energy models and systems for isolated areas with different scales and demands. This paper reviewed the forecasting techniques of energy demand and renewable energy (RE) resources, energy models, application of hybrid RE systems (HRESs), and management of energy planning for two most representative isolated areas: islands and remote villages. The uncertainty analysis of energy systems of isolated areas is also discussed. It is evident that the indigenous RE resources show great potentials for the energy system of isolated areas, especially the solar and wind resources. The various combinations of photovoltaic (PV), wind, diesel and batteries have been proven more competitive. Also, it is necessary to develop sophisticated models that are more applicable to isolated areas and that consider the distinctive characteristics, practical needs and uncertainties of isolated areas.

103 citations

Journal ArticleDOI
TL;DR: A compact guide of existing model modification and novel model development regarding predicting global solar radiation, including input parameters, feature selection and model development for machine-learning models is provided.

93 citations

Journal ArticleDOI
TL;DR: In this paper, the authors investigated the relationship between temperature and learning performance and found that thermal discomfort caused by high or low temperatures had a negative impact on pupil learning performance, while carbon dioxide concentration, acoustics, and illumination were maintained at the same level.

89 citations

Journal ArticleDOI
TL;DR: In this paper, the optimum opening and closing modes in the management of air vents have been obtained by testing and analyzing thermal performance parameters of a trombe wall installation, including air vent velocity, air vent temperature, the temperature distribution of air layer and indoor air temperature.

69 citations


Cited by
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Journal Article
TL;DR: 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.
Abstract: 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

13,333 citations

01 Jan 2016

1,633 citations

01 Dec 1976
TL;DR: A simple method of estimating the average daily radiation for each calendar month on surfaces facing directly towards the equator has been presented by Liu and Jordan as discussed by the authors, verified with experimental measurements and extended to allow calculation of monthly average radiation on surfaces of a wide range of orientations.
Abstract: Several simplified design procedures for solar energy systems require monthly average meteorological data. Monthly average daily totals of the solar radiation incident on a horizontal surface are available. However, radiation data on tilted surfaces, required by the design procedures, are generally not available. A simple method of estimating the average daily radiation for each calendar month on surfaces facing directly towards the equator has been presented by Liu and Jordan [1]. This method is verified with experimental measurements and extended to allow calculation of monthly average radiation on surfaces of a wide range of orientations.

650 citations

Journal ArticleDOI
TL;DR: In this paper, a review of the literature on human thermal comfort in the built environment is presented, which includes standards, indoor experiments in controlled environments, indoor field studies in educational, office, residential and other building types, productivity, human physiological models, outdoor and semi-outdoor field studies.

609 citations

Journal ArticleDOI
TL;DR: In this article, a hybrid support vector machine (SVM) model was proposed to forecast both solar and wind energy resources for most of the locations in the United States, where the authors highlighted main problems, opportunities and future work in this research area.

350 citations