• 설비공학논문집
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• 제23권10호
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• pp.656-661
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• 2011

The amount of water resources that can be used tend to be decreased gradually. In contrast, the rapidly increasing water consumption is a problem that need to be addressed. Renovation and equipment replacement to improve energy efficiency and to reduce expenditure for building usage is required. But the excessive initial investment cost and the prolonged of pay back period may be uneconomical choice. Water usage for cleaning the toilet bowl accounts for 27%of the total water usage. Water-saving valve that can select the amount of water for cleaning toilet bowl can be reduced expenditure. After installing water-saving valve, analysed the economic effects. Water-saving valves compared with flush valves, and researched the amount of water usage. Then analyzed for the economic effects. Water-saving valve was used 5.6 ${\ell}$/time for cleaning toilet bowl. In contrast, flush valve was consumed 8.4 ${\ell}$/time. Water-saving valve's water-saving rate was 33.3%. The initial payback period for Water-saving valve was 459.5 days. By a small investment in water saving valve, the economic benefits can be obtained.

• 한국환경과학회지
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• 제12권4호
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• pp.503-510
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• 2003

How to plan the energy system is one of the keys f3r constructing the Environment -Friendly City. for this reason, a great number of surveys for utilizing unused energy have conducted by a planner. In regard to unused energy, the heat from incineration plants classify as a unused energy having high-exergy-energy. From this point of view, It is studied about the plant systems providing heat to district heating & cooling(D.H.C) and producing electric power. It is divided four system models as system I (10K [kgf/cm$^2$) vapor as outlet of boiler, supply far 10K vapor and return to 60$^{\circ}C$ as supply condition of district heating), system II (30 K vapor as outlet of boiler, supply for 5t vapor and return to 60f as supply condition of district heating), system 111 (30 K vapor as outlet of boiler, supply for 85$^{\circ}C$ hot water and return to 60$^{\circ}C$ as supply condition of district heating), system IV (30 K vapor as outlet of boiler, supply for 47$^{\circ}C$ hot water and return to 40t as supply condition of district heating). The results from the upper condition of four system, System II got a proper on economical benefits and system IV calculated as benefiting on energy saving effects, and suggest indifference curve as the total evaluation method of both economical benefits and energy saving.

• 가정과삶의질연구
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• 제18권3호통권47호
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• pp.39-52
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• 2000

The purposes of this study were to identify the attitudes toward of market goods characteristics and to investigate the relationships between attitudes toward market goods characteristics and the level of market goods substitution of housework. For empirical analysis, the data of the study was collected from 572 married women living in Seoul. A questionnaire was used as a survey method. Data was analysed using SPSS/WIN8. The major findings of the study were as follows: 1) Wives had negative attitudes toward quality characteristics in the domain of food, but positive attitudes in the domain of clothes. They had positive attitudes toward time/labor saving characteristic, especially ready-made side dishes and dining-out, whereas negative attitudes toward money saving characteristic in the domain of food and clothes. 2) The level of market goods substitution of housework was influenced by the attitudes toward market goods characteristics.

• 한국환경과학회지
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• 제12권3호
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• pp.359-366
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• 2003

Ecological society and energy conservative systems has become a subject of world wide attention. To examine the technologies of such systems as resource recycling society, this study is proposed for using rainwater as energy source and water resources in urban area. Useful informations for planning of utilizing rainfall as energy source, water resources, emergency water and controlling flood are discussed with model systems in urban area. It is calculated that the rate of utilizing rainwater, amounts of utilizing rainwater, substitution rate of supply water, amounts of overflow rainwater according to rain storage tank volume. By applying the past weather data, The optimum volume of rain water storage was calculated as 200m$^3$ which mean no benefits according to the increase of storage tank volumes. For optimum planing and control method at the model system, several running method of rainwater storage tank was calculated. The optimum operating method was the using weather data as 3hours weather forecast.

• 가족자원경영과 정책
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• 제2권1호
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• pp.59-77
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• 1998

The purpose of this study was to test a causal model of subjective financial well-being. The data of this research was obtained from 660wives who lived in Seoul, 1996. Major findings of this study were at follows: 1. Both employed and unemployed wives, younger managers were more likely to have a higher cohesion and adaptability between spouses. For the unemployed wives, locus of control over managers’financial situation and perception of gap between standard and level of living were significant predictors of the personal subsystem. 2. In both groups, financial planning was positively influenced by amount of saving. But amount of saving was not significant predictor of financial implementing. Financial implementing was positively influenced by locus of control, in the unemployed wives. For the employed wives, predictors of financial implementing were family income and marriage duration. 3. For the employed wives, the effect of personal and managerial subsystem on subjective financial well-being was greater than unemployed wives. 4. It was found that personal and managerial subsystems had effect on subjective financial well-being. Thus, the path model designed in this research was found to be proven for employed and unemployed wives.

• 가족자원경영과 정책
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• 제5권1호
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• pp.15-31
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• 2001

The purpose of this study is to identify participation-types of the family in the purchasing decision-making on items of commodities (TV, refrigerator, furniture, passenger car, housing, vacation, saving, husbands’clothing and children’s clothing). The other thing is to find who is major factors in each of the decision-making stages(the recognition of problem, the searching of information, the evaluation of alternatives and purchasing) among the subjects of decision-making (husband, wife, couple combination and family combination). To complete the purpose, the data were collected through questionnaire which 549 wives living in Seoul answered. From the data, frequency, percentage and correspondence analysis were executed by SPSS. The results of this study were briefly summarized as follows; Wives played an important role on all of decision-making stages for refrigerator, furniture, children’s clothing and husbands’clothing. Husbands played an important role on vacation and passenger car. And in case of saving, TV and housing, couple combination played an important role. It means that wives have a major influence on the purchasing process.

• 한국농촌생활과학회지
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• 제6권2호
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• pp.137-149
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• 1995

The first objective of this study is to examine the finanacial management practices of rural housewives. The second objective is to determine the effects of sociodemographic characteristics on financial management practices. The Deacon & Firebaugh's model of family resource management framework and previous studies were used to determine the effects, regarding a9e, income, number of family, education level, and farming/nonfarming as independent/input variables, and monthly saving and managerial behavior index as dependent/throughput variables. A sample of 179 rural housewives aged less than 60 was selected from Shihung-Si Gyonggi-Do Province. Results showed that rural housewives more frequently did keeping bills, making purchase-list and verifying purchase need than recording where money spent making financial plan, and evaluating spending. With regard to household debt use, 60% of the sample had debt the most borrower used debt for farming, 73% of borrowers paid for their debt behind the schedule, and the main source of borrowing was NACF (NongHyup). Using installment credit, the rural housewives mainly bought cosmetics. 25% of the sample had credit cards. Average debt was 6, 070, 000 won, and 81% of annual income. In terms of saving, 85% of the sample saved, and 23% of the sample lived with the money after save. The main reasons of saving were for education and marriage of children and emergency. The main saving institutions were NACF and NLCF (ChukHyup). The regression showed that income was negatively associated with monthly saving, and age was identified as the positive determinants of managerial behavior index.

• 한국태양에너지학회 논문집
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• 제34권3호
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• pp.89-97
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• 2014

Recently design standard for energy-saving in apartment buildings has been consolidated gradually on the basis of evaluation and certification standards of energy efficiency of buildings, the energy-saving policy of building at home and abroad. Performance criteria for thennal insulation as well as fenestration has been progressively enhanced, and performance criteria for ventilation and airtightness of the building have also been re-developed. Therefore, heating and cooling load characteristics of the apartment building can be changed. For the design of the upcoming heating and cooling equipment in apartment buildings, it is necessary to evaluate the heating and cooling load characteristics according to the design strategies for energy saving in apartment buildings. As a result, in this study, it is intended to use as a resource for analyzing the impact that the adoption of energy-saving design variables for each of the apartment buildings, to predict the heating and cooling load characteristics in the apartment building.

• 전기학회논문지
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• 제60권6호
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• pp.1225-1228
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• 2011

This paper presents an advanced energy saving algorithm in building. It is important to aggregate a various demand side resource which is controllable on demand response environment. Previous demand side algorithm for building is restricted on peak power. In this paper, we suggest duty cycle algorithm for AHU on demand response to reduce the quantity of building power consumption. The test results show that the proposed algorithm is very effective.

• 한국주거학회논문집
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• 제7권2호
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• pp.109-120
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• 1996

This study which aimed to propose development directions for the future housing through the social change tries to predict the change of the future. Establish directions for planning of concept-Sustainability. Human-friendliness. High Technology and, with reference to case study and literature judge feasibility of them. The major findings were as follows : 1. Development direction related to the future housing can be classified into 7 principle : energy-saving, resource-saving, natural adaptation, community, user participant, super high level, and home intelligent. 2. Planning factors of the future housing can be divided into several itemes.