• 한국주거학회논문집
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• 제26권1호
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• pp.1-10
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• 2015

In line with the recent public concern on the environmental issues in building industry, there has been a rise in demand for a healthy, sustainable housing environment in South Korea. In order to achieve a healthy environment in residential buildings, considerable efforts have been made in a wide range of sectors. Among others, the development of the certification schemes to promote environment-friendly planning and building construction is remarkable. In urban South Korea, recently built houses tend to be significantly high-rise, high-density buildings. Global warming has brought about drastic climate change and continued to increase the average annual temperature year by year. These changes should be well reflected on the government's implementation of the building environmental assessment system. For guidance, therefore, this study looks to the case of Hong Kong which is well known for high-density housing development and subtropical climate conditions. It compares the features of the green building certification schemes for newly developed multifamily housing in two regions, namely HK-BEAM in Hong Kong and G-SEED in South Korea. Based on the findings, it argues that the G-SEED implementor should have expanded roles in providing training programs and follow-up services in collaboration with the certification authorities. It is also argued that G-SEED professionals should be involved in the early stages of design processes, and training programs and licence systems to produce green building professionals should be developed. Finally, it points out that the assessment indicators should be more detailed and diversified.

• Advances in Energy Research
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• 제4권2호
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• pp.107-120
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• 2016

The aim of this research is to apply the eQuest model to investigate the energy conservation in a multifamily building located in Dayton, Ohio by using a Trombe wall and an ammonia ground source heat pump (R-717 GSHP). Integration of the Trombe wall into the building is the first retrofitting measure in this study. Trombe wall as a passive solar system, has a simple structure which may reduce the heating demand of buildings significantly. Utilization of ground source heat pump is an effective approach where conventional air source heat pump doesn't have an efficient performance, especially in cold climates. Furthermore, the type of refrigerant in the heat pumps has a substantial effect on energy efficiency. Natural refrigerant, ammonia (R-717), which has a high performance and no negative impacts on the environment, could be the best choice for using in heat pumps. After implementing the eQUEST model in the said multifamily building, the total annual energy consumption with a conventional R-717 air-source-heat-pump (ASHP) system was estimated as the baseline model. The baseline model results were compared to those of the following scenarios: using R-717 GSHP, R410a GSHP and integration of the Trombe wall into the building. The Results specified that, compared to the baseline model, applying the R-717 GSHP and Trombe wall, led to 20% and 9% of energy conservation in the building, respectively. In addition, it was noticed that by using R-410a instead of R-717 in the GSHP, the energy demand increased by 14%.

• 한국조경학회지
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• 제26권3호
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• pp.104-117
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• 1998

Rising concern about climate change has evoked interest in the potential for urban vegetation to help reduce the level of atmospheric CO\sub 2\, a major heat-trapping gas. This study quantified the functio of home energy savings and carbon emission reduction by shading, evapotranspiration and windspeed reduction of urban vegetatioin in Chuncheon. Tree and shrub cover averaged approximately 13% in residential land. The effects of shading, evapotranspiration and windspeed reduction annually saved heating energy by 2.2% and cooling energy by 8.8%. The heating and cooling energy savings reduced carbon emissions by 3.0% annually. These avoided emissions equaled the amount of carbon emitted annually from fossil fuel consumption by a population of about 1,230. Carbon emission reduction per residential building was 55kg for detached buildings and 872 kg for multifamily buildings. Urban vegetation annually decreased heating and cooling energy cost by ￦1.1 billions, which were equivalent to annual savings of ￦10,000 savings and carbon emission reduction due to tree plantings in the wrong locations, while windspeed reduction had a great effect. Plantings fo large trees close to the west and east wall of buildings, full tree plantings on the north, and avoidance of shade-tree plantings or selection of solar-friendlytrees on the south were recommended to improve the function of building energy savings and carbon emission reduction by urban vegetation.

• Asian Journal of Innovation and Policy
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• 제9권2호
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• pp.223-239
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• 2020

It is important for urban planners and policy makers to understand complex, diverse urban demands and social structure, but this is not easy due to lack of data that represents the dynamics of residents at micro-geographical level. This paper explores how to create population data at at a micro-level by allocating population data to building. It attempted to allocate population data stored in a grid layer (100 meters by 100 meters) into a building footprint layer that represents the appearance of physical buildings. For the allocation, this paper describes a systemic approach that classifies grid cells into five prototypical patterns based on the composition of residential building types in a grid cell. This approach enhances allocation accuracy by accommodating heterogeneity of urban space rather than relying on the assumption of uniform spatial homogeneity of populations within an aerial unit. Unlike the methods that disaggregate population data to the parcel, this approach is more applicable to Asian cities where large multifamily residential parcels are common. However, it should be noted that this paper does not demonstrate the validity of the allocated population since there is a lack of the actual data available to be compared with the current estimated population. In the case of water and electricity, the data is already attached to an individual address, and hence, it can be considered to the purpose of the validation for the allocation. By doing so, it will be possible to identify innovative methods that create a population distribution dataset representing the comprehensive and dynamic nature of the population at the micro geographical level.

• 토지주택연구
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• 제2권4호
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• pp.453-461
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• 2011

주택에 대한 수요가 다변화되면서 최근 한옥주택 및 한옥주거단지에 대한 사회적 관심이 증대되고 있다. 기존에 한옥이 밀집한 지역을 중심으로한 정비사업 뿐만 아니라, 대규모 택지개발지구등에서도 한옥주택과 주거단지 개발에 대한 시도가 이루어지고 있지만, 본격적인 사업화는 이루어지지 않고 있다. 본 연구는 LH가 공급하는 신도시의 단독주택용지와 특성화용지등을 대상으로 하여 한옥의 잠재적 수요계층을 바탕으로 사업모델을 도출하고 사업모델에 대한 타당성을 검증하여 향후 사업화를 위한 방향을 제안하고자 한다. 기존에 검토되었던 고급형 타운하우스 형태의 한옥주거단지는 입지선정, 수요불일치 등으로 인하여 사업성이 부족한 것으로 분석되었으며, 설문조사 결과등을 바탕으로 계획규모변경, 용도혼합, 필지세분화등의 방법을 통해 사업유형을 6가지로 설정하였다. 사업모델 중에서 가장 사업성이 높은 유형은 블록형 집합주택으로, 이는 규모의 경제법칙(Ecnomy of Scale)에 따른 건축연면적의 증가가 분양수입의 증대로 이어진 것으로 이해할 수 있다. 소규모 한옥과 근생시설이 결합한 공동주택 모델의 타당성도 높게 나타났으며, 블록형 집합주택과 같은 동일한 사업조건을 적용한다면, 한스타일 공동주택의 사업성이 높은 것으로 분석되었다. 그 밖에 블록형 단독주택지내 고급주택 모델은 민간부문이 일반적으로 추진하고 있는 대표적인 사업유형으로서, 1호당 건설비용이 9.1억원으로 가장 많은 비용이 투입되는 것으로 나타났다. 한옥주거단지 사업성 제고를 위해서는 입지선정, 수요계층의 다양화, 주택규모의 적정화, 용도혼합등을 통한 집합화가 필요할 것으로 판단된다. 또한 단독주택용지에 한옥주택을 도입하기 위해서는 기존의 필지계획의 조정과 분할이 필요하며, 한옥형 용지등의 공급을 통해 새로운 수요에 대응하는 전략도 제안될 수 있다. 또한 기존의 획일적인 택지개발방식에서 벗어나 기초인프라(간선도로 및 상하수도)외에 조성되지 않은 자연상태의 토지인 원형지(原形地) 공급을 통한 개발방식도 검토할 수 있으며, 한옥의 지붕 및 가구구조상 1~2층 이상의 건축이 불가능하므로 경사지 형태를 갖는 원형지 공급방식의 단지조성이 토지비절감, 경관효과 등을 감안할 때 적합한 모델로 제안될 수 있다.