Energy audit compares energy consumption and energy efficiency of different enterprises in the same industry by investigating the overall energy consumption, energy consumption increase, energy consumption per unit of product, etc.

The aim of energy audit is to find a real energy saving solution, to create new ideas, and to prepare energy management improvements while saving costs.

To achieve this goal, it is very important to set up detailed audit indicators and, on this basis, to perform detailed audit on each indicator.

To Sang Il, a researcher at the Faculty of Industrial Economic Management, established general and detailed energy audit indicators for industrial enterprises and proposed a standard energy audit method based on them.

First of all, he set indicators in terms of energy utilization technology, energy management method, energy self-production and energy environmental impact. Based on the indicators, he proposed a method of conducting the survey and analysis of energy use of industrial enterprises. Then, he used the attribute hierarchy model (AHM) and the entropy method to determine the weights of evaluation indicators and to comprehensively evaluate the energy use level. After that, he proposed a method to identify improvement measures by prioritizing the alternatives.

For more information, please refer to his paper “Energy Auditing Method for Industrial Enterprises” in “Proceedings of KUTIC-2025”.

A separate type thermosyphon is a two-phase device with extremely high effective thermal conductivity that utilizes the thermodynamic pressure difference that develops between the evaporator and the condenser to circulate working fluid through a closed loop. With long-distance heat transport capability unlike traditional heat pipes, SHPs have been widely utilized in difference areas.

Based on the analysis of preceding research papers, Pak Yong Nam, a researcher at the Faculty of Thermal Engineering, proposed a novel separate type thermosyphon with a jacketed condensation section and conducted a theoretical study of the installation height of evaporation and jacketed condensation sections.

He considered the installation height of evaporation and jacketed condensation sections while varying the input heat under 150W. The results indicate that the installation height rises with the increase in the input heat and the installation height may be 30cm under the input of 150W.

With the increasing availability of computer networks and the ever-increasing demand for network security, it is important to ensure confidentiality and reduce computational costs in access to databases.

Access control encryption plays a key role in ensuring confidentiality of databases and efficient management of computer networks. There has been active research on access control encryption, which has resulted in various modes and kinds. Particular intensity has been directed to the attribute-based encryption, which combines attribute-based access control model and encryption scheme, and many approaches have been proposed to improve security and efficiency for different applications.

Pak Su Ryon, a researcher at the Faculty of Information Science and Technology, has proposed an attribute-based multilayer access control scheme, which has 3 layers of attributes for performing different functions, with a purpose to ensure confidentiality and access control efficiency and to reduce computational cost.

The validity result of the effectiveness of the proposed method shows that the time of access control is reduced by less than 70% and the system ensures the confidentiality of databases while providing partial access to them and enables the system manager and the data owner to control access together.