The Utilization of Heat Exchangers for Energy Conservation in Air Conditioning

This paper investigates the characteristics of heat exchanger (HPHE) as an efficient coolness recovery unit in air conditioning through experimental studies. It was conducted under a multiple-nozzle code tester based on the ASHRAE standards. The wind tunnel was subjected to airflow with considerable variation in its inlet air temperature. Among the factors being investigated are the air velocity, inlet and outlet air temperatures, overall efficiency and the number of rows in longitudinal direction. The data obtained were compared with the results predicted by previous theoretical studies. Good agreement was observed

Apply Information System of Maritime Energy for Improving Performance in Taiwan’s Coast Guard

Taiwan is not a member of the International Maritime Organization country, and the domestic business is also a multi-horse carriage. There is no integration and a single government department is responsible. Therefore, it is relatively difficult to check the relevant statistical inquiries, and the definition objects are also different. The information must be subject to the announcement of the International Maritime Organization. However, the data may be subject to statistical errors due to the construction of errors and omissions. The motivation of this paper is to roughly guess Coast Guard’s information system and maritime energy to discuss how to improve the work performance. Materials use and cost estimates are resolved for both developmental and implementation activities. In addition, enhanced services costs are resolved to with total and average costs of standard EAP services. These findings provide point of reference cost estimates for other EAPs that may be considering offering enhanced services

Comparison of chemical profiles and effectiveness between Erxian decoction and mixtures of decoctions of its individual herbs : a novel approach for identification of the standard chemicals

Acknowledgements This study was partially supported by grants from the Seed Funding Programme for Basic Research (Project Number 201211159146 and 201411159213), the University of Hong Kong. We thank Mr Keith Wong and Ms Cindy Lee for their technical assistances.Peer reviewedPublisher PD

Near tip strain evolution of a growing fatigue crack

Near tip full-field strains in a growing fatigue crack have been studied in situ using the Digital Image Correlation (DIC) technique in a compact tension specimen of stainless steel 316L under tension-tension cyclic loading. An error analysis of displacements and strains has been carried out, and the results show that the precision of displacements and strains in the wake of the crack is worse than that in front of the crack. A method for the determination of crack tip location is proposed for the DIC analysis. Strain ratchetting is observed ahead of the growing fatigue crack tip and found to be dependent on the distance to the crack tip; whilst normal strains appear to stabilise behind the crack tip