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실증운전을 통한 배가스 열회수 히트펌프 시스템의 성능 분석
이승호(Seung-Ho Lee),이길봉(Gil-Bong Lee),이영수(Young-Soo Lee),박상일(Sang-Il Park),고창복(Chang-Bok Ko),백영진(Young-Jin Baik),이관수(Kwan-Soo Lee) 대한설비공학회 2014 설비공학 논문집 Vol.26 No.1
A field test of a 70 ㎾ heat pump system with flue gas heat recovery was performed by an experiment at the Korea Institute of Energy Research. The flue gas is exhausted from a 320 RT absorption chiller-heater in the heating season. Using this flue gas, source water of the heat pump is heated by a condensed-type heat exchanger in the chimney. The operating characteristics of the heat recovery heat pump system were analyzed. Based on the results of the experiments, operating maps were obtained, and an optimum operating range is suggested, in which the return and heat source water temperature are 51℃ and 31℃, respectively. Additionally, economic analysis of this system was conducted and about 50% energy cost savings can be expected in the heating season.
황원무 ( Won Moo Hwang ),김명희 ( Myeong Hee Kim ),윤가리 ( Ga Ri Yun ),이길봉 ( Gil Bong Lee ),고종명 ( Jone Myeung Go ),김용희 ( Yong Hee Kim ) 한국동물위생학회 2008 한국동물위생학회지 (KOJVS) Vol.31 No.2
This study was conducted in order to get basic data on standards and specifications of health and functional foods. A total of 101 kinds of functional healths foods were examined during the period of January to December 2005. Among them, 89 kinds were local products and 12 kinds were imported products. Test items were 6 kinds of heavy metals(lead, cadmium, mercury, copper, zinc and manganese), 5 bacteria(common bacteria, coliform group, E coli, Bacillus cereus and Clostridium perfringens), and 6 preservatives(sorbic acid, benzoic acid, DHA, ethyl paraben, propyl paraben and butyl paraben). As a result of heavy metals, cadmium, was detected from the glucosamine products by 1.52ppm in average, mercury from cereal products by 0.004ppm in average, and lead from chlorella foods by 3.48ppm in average. Bacteria were identified from 3 cereal products, and amount of common bacteria were about 4.8×105cfu/g in average. E Coli and Coliform group were isolated from 2 products and 4 products, respectively. All of those products were flour meal products. Any of 6 kinds of preservatives was not detected from all the products. It is thought that these test results will be available as basic data for enactment of relevant laws and regulations for production and control of safer and more hygienic foods in the future because the standards of the harmful heavy metals are not complete or available yet according to the Food Sanitation Law and the Functional Healths Foods Law.