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다중단위 거래의 혜택 유형이 프로모션 태도에 미치는 효과
소지원,김재휘 한국소비자학회 2023 소비자학연구 Vol.34 No.4
Selling multi-unit of the same product can be a desirable goal for businesses and marketers, not only to increase short-term sales, but also to encourage subsequent inertial purchases and brand loyalty. Multi-Unit Price promotion (MUP) is a sales promotion strategy that offers conditional price benefits (e.g., buy 3 & get 1 free, buy 4 & get 25% off, etc.) for purchasing multiple units of the same product. In this study, we investigate whether expressing discounts accompanying MUPs in terms of product units rather than monetary units leads to higher perceived utility for consumers. The nature of MUPs, where many products are promoted at once, can lead to contractionary forecasts of total utility, as consumers express not only how satisfied they are with the transaction, but also how they expect to experience the product in the future. If the monetary benefit is simply emphasized, consumers would not perceive the discount as a significant benefit in their market beliefs and would not be motivated to actively predict the expected total utility from using the product. On the other hand, if consumers perceive the deal as responding to a promotion to obtain a productive benefit, they may be more motivated to actively express product utility, and by categorizing the promotional quantity, they may perceive a greater magnitude and duration of future product positive sentiment. In Experiment 1, we observed that consumers who were presented with a product-unit benefit in the context of a promotion for a total of four products expressed positive attitudes toward the promotion. This effect was mediated by consumers' more inflated estimates of total utility from products with a promotional quantity. In Experiment 2, we replicated the effects of Experiment 1 in the context of promoting a total of 12 products and observed that not only promotional attitudes but also consumers' quantity choices were significantly higher in the product-unit benefit condition. This study provides practical implications that expressing the benefit of MUPs in terms of product unit can have positive effects on product and brand value maintenance as well as short-term promotional effects.
주홍진(Joo Hong-Jin),황인선(Hwang In-Seon),곽희열(Kwak Hee-Youl) 한국태양에너지학회 2011 한국태양에너지학회 논문집 Vol.31 No.1
This study was accomplished to evaluate the performance of Multi Effect Distillation(MED) for solar thermal desalination system. It was designed Multi effect distillation with 3㎥/day capacity and Shell&Tube type heat exchanger. Also, The effective heat transfer of Shell&Tube heat exchanger was used Cu(90%)-Ni(10%) corrugated tube. The parameters relating to the performance of Multi Effect Distillation are known as hot water flow rate. The experimental conditions for each parameters were 18℃ for sea water inlet temperature, 6㎥/hour sea water inlet volume flow rate, 75℃ for hot water inlet temperature, 2.4, 3.6, and 4.8㎥/hour for hot water inlet volume flow rate, respectively. The results are as follows, Development for Multi effect distillation was required about 40㎾ heat and 35㎾ cooling source to produce 3㎥/day of fresh water. Based on the results of this study, It makes possible to secure economics of desalination system with solar energy which is basically needed development of high efficiency fresh water generator.
태양에너지 해수담수화를 위한 증발식 다중효용 담수기 개발
주홍진(Joo Hong-Jin),황인선(Hwang In-Seon),윤상국(Yun Sang-kook),윤응상(Yun Eung-San),서태범(Seo Tae-Beom),곽희열(Kwak Hee-you) 한국태양에너지학회 2010 한국태양에너지학회 학술대회논문집 Vol.2010 No.4
This study was carried out to evaluate the performance for Multi Effect Distillation(MED) with solar energy desalination system. It designed and manufactured Multi effect distillation with 3㎥/day capacity in order to perform of evaluation. The parameters relating with the performance of Multi Effect Distillation are known as hot water flow rate. The experimental conditions for each parameters were 18℃ for sea water inlet temperature, 75℃ for hot water inlet temperature, 2.4, 3.6, and 4.8 ㎥/hour for hot water inlet volume flow rate, respectively. The results are as follows, Development for Multi effect distillation is required about 40㎾ heat source to produce 3㎥/day of fresh water. Based on the results of this study, It makes possible to secure economics of desalination system with solar energy which is basically needed development of high efficiency fresh water generator
태양열 해수담수화를 위한 증발식 다중효용 담수기 성능평가
주홍진(Joo Hong-Jin),곽희열(Kwak Hee-Youl) 한국태양에너지학회 2011 한국태양에너지학회 학술대회논문집 Vol.2011 No.4
This study was accomplished to evaluate the performance of Multi Effect Distillation(MED) for solar thermal desalination system. It was designed Multi effect distillation with 3㎥/day capacity and Shell&Tube type heat exchanger. Also, The effective heat transfer of Shell&Tube heat exchanger was used Cu(90%)-Ni(10%) corrugated tube. The parameters relating to the performance of Multi Effect Distillation are known as hot water flow rate. The experimental conditions for each parameters were 18 ℃ for sea water inlet temperature, 6㎥/hour sea water inlet volume flow rate, 75℃ for hot water inlet temperature, 2.4, 3.6, and 4.8 ㎥/hour for hot water inlet volume flow rate, respectively. The results are as follows, Development for Multi effect distillation was required about 40㎾ heat and 35㎾ cooling source to produce 3㎥/day of fresh water. And, Performance ratio of Development Multi effect distillation was about 2.0191.
증발식 다중효용 담수기에서 열교환기 튜브 배열 및 형상에 따른 액막 유동에 관한 수치해석
정일영(Jung, Il-Young),윤상국(Yun, Sang-Kook),주홍진(Joo, Hong-Jin),곽희열(Kwak, Hee-Youl) 한국태양에너지학회 2011 한국태양에너지학회 학술대회논문집 Vol.2011 No.11
This study was performed numerical analysis in order to analyze liquid film flow of heat exchanger tube arrangement and configuration of evaporative multi effect distillation system using medium-temperature. Simulation was accomplished the two-dimensional calculations using commercial analyses program FLUENT based on the FVM(finite volume method). Fresh water generator of this study used Shell & Tubes heat exchanger with Cu_Nitube, configuration of tube used bare tube and corrugated tube, and arrangement of tube used in-line array and staggered array. Performance of heat exchanger through the formation of liquid film was compared and analyzed. Liquid film flow occurred that falling on heat exchanger tube wall. Result of simulation showed that liquid film thickness of in-line arrangement was found0.57mm with bare tube and 0.67mm with corrugated tube, respectively. And liquid film thickness of staggered arrangement was found 0.39mm with bare tubes and 0.62mm with corrugated tubes, respectively. Liquid film thickness of corrugated tube showed thicker than bare tube, but heat transfer rates of corrugated tube showed higher than bare tube. The reason was considered that surface area of corrugated tube was wider than bare tube. And liquid film thickness of staggered arrangement showed thinner than in-line arrangement, so thermal performance of staggered arrange mentshowed higher than in-line arrangement.
공정설계를 통한 MED-TVC 기반 해수담수화 플랜트 적용성 평가
임승택(Seungtack Lim),김현주(Hyeonju Kim),이호생(Hosaeng Lee) 한국해양환경·에너지학회 2021 한국해양환경·에너지학회 학술대회논문집 Vol.2021 No.5
세계 담수화 시장의 60%가량을 차지하는 역삼투(RO) 기반 해수담수화 기술은 고도로 농축된 브라인을 해상으로 배출하면서 해양의 오염을 초례하는 피해를 발생하고 있으며, 선진국을 중심으로 고염수의 수처리 및 흡착식(AD) 담수화 방식을 적용한 고도농축과 미네랄 추출을 통해 배출 제로를 요하고 있다. 다만 담수생산량이 적은 흡착식 담수화 방식의 효율과 담수량 증가를 위해 다중효용증발식(MED) 담수화와 흡착식 담수화를 복합 활용한 하이브리드 담수화 기술이 개발되고 있으며, 중동을 중심으로 적용이 진행되고 있다. 본 논문에서는 다양한 중동 해역의 온도 데이터를 적용하여 MED-TVC 기반 해수담수화의 담수생산과 에너지소비량의 특성을 파악하였으며, AD 공급을 위한 브라인의 농축염도를 분석하였다. 이때 28℃의 해수온도를 기준으로 1.7kg/s의 담수량과 79,000PPM의 염도량을 확인하였다. The reverse osmosis (RO)-based seawater desalination technology, which accounts for about 60% of the world's desalination market, discharges highly concentrated brine into the sea, causing damage that causes pollution of the ocean. (AD) Zero emission is required through high concentration and mineral extraction applying the desalination method. However, hybrid desalination technology using a combination of multiple effect evaporation (MED) desalination and adsorption desalination is being developed to increase the efficiency and freshwater amount of the adsorption desalination method with low freshwater production, and applications are being conducted in the Middle East. In this paper, the characteristics of freshwater production and energy consumption of MED-TVC-based seawater desalination were investigated by applying temperature data of various Middle East sea areas, and the concentrated salinity of brine for AD supply was analyzed. At this time, the amount of fresh water of 1.7kg/s and the amount of salinity of 79,000PPM were confirmed based on the seawater temperature of 28℃.
다중효용증발식 해수담수화 설비의 운전 강건성 보장을 위한 열증기압축기 연구
박일석(Park Il Seouk) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.5
Efficiency of a multi-effect desalination (MED) system with a thermal vapor compressor (TVC) is highly affected by the entraining performance of TVC. TVC's high entraining ability makes it possible to reduce the heat transfer area in evaporators or keep the top brine temperature (1<SUP>st</SUP> effect cell-side temperature) lower. Therefore, to achieve a higher entrainment ratio of TVC, we investigate the cases in which the motive steam flows into the primary nozzle with a swirl component. The compressible, axi-symmetric, and swirled flow is numerically solved for various swirl-to-axial component ratios. The Mach number, isobars, radial velocities, and shock patterns are compared to evaluate the effect of the swirled motive steam inflow on the entrainment ratio. This numerical study revealed that there exists an optimum swirl angle that maximizes the entrainment ratio.