[신간의 별자리x] 우리/미술, 그리고 ‘슬픔의 박물관’

An introduction to heat transfer

Journal of Physics Condensed Matter: Preface

Annual Energy Outlook

Recent developments in phase change materials for energy storage applications: A review

Enhancing heat transfer surface are used in many engineering applications such as heat exchanger, air conditioning, chemical reactor and refrigeration systems, hence many techniques have been investigated on enhancement of heat transfer rate and decrease the size and cost of the involving equipment especially in heat exchangers. One of the most important techniques used are passive heat transfer technique. These techniques when adopted in Heat exchanger proved that the overall thermal performance improved significantly. This paper reviews experimental and numerical works taken by researchers on this technique since 2004 such as twisted tape, wire coil, swirl flow generator,… etc. to enhance the thermal efficiency in heat exchangers and useful to designers implementing passive augmentation techniques in heat exchange. The authors found that variously developed twisted tape inserts are popular researched and used to strengthen the heat transfer efficiency for heat exchangers. The other techniques used for specific work environments are studied in this paper. Twisted tape inserts perform better in laminar flow than turbulent flow. However, the other several passive techniques such as ribs, conical nozzle, and conical ring, etc. are generally more efficient in the turbulent flow than in the laminar flow.

A comprehensive review on passive heat transfer enhancements in pipe exchangers

Recently, there is growing demand for alternative new heating technology, ohmic heating is an alternative and fast heating method has a large number of actual and potential application exits in food industry, water distillation, waste treatment, chemical processing etc. This paper presents a comprehensive review of ohmic heating current application, design configurations and operation parameters. The review highlights that ohmic heating are prospective alternative new heating technology to meet the demand of industrial and domestic heating utilizing. The recommendations for further research are made to provide more robust analysis in assessing ohmic heating performance.

A comprehensive review on applications of ohmic heating (OH)

Thermal energy storage (TES) technologies incorporating phase change materials (PCM) are proving viable option for achieving energy efficiency economically in the buildings. This paper reviews the application of air-PCM-TES studies and technologies for the free cooling and heating of buildings. TES in general and air-PCM-TES in particular are discussed in this review. An extensive investigation on air-PCM-TES systems has been undertaken through passive and active methods and the advantages and disadvantages for each, are detailed. The thermal performances of these systems have been investigated through experimental and numerical approaches and listed in this paper. Passive methods e.g. use of PCMs in the building envelope present difficulty of exchanging a high rate of heat and therefore unsuitable for extreme climate. Therefore, active methods are adopted for extreme climates to meet the demand. Overall, when the right method is applied, air-PCM-TES systems have shown to be effectively providing free cooling and heating of the buildings through auxiliary sources.

Shuli Liu

Papers

A comprehensive review on passive heat transfer enhancements in pipe exchangers

A comprehensive review on applications of ohmic heating (OH)

A review on the air-PCM-TES application for free cooling and heating in the buildings

Comparative study of heat and mass exchanging materials for indirect evaporative cooling systems

Experimental study on thermal performance of a solar chimney combined with PCM