scholarly journals Technologies of zero energies buildings. A review

2019 ◽  
Vol 21 (2) ◽  
pp. 1-11
Author(s):  
Debrayan Bravo Hidalgo ◽  
Alexander Baez-Hernandez

Buildings represent a significant proportion of total carbon and energy emissions worldwide and play an important role in the formulation of sustainable development strategies. Several countries have adopted or consider the possibility of establishing Zero Energy Buildings (ZEB) as their future energy targets to alleviate the problems related to the depletion of energy resources and the deterioration of the environment. The objective of this contribution is to expose the research trends in ZEB technologies.To achieve this goal, the contribution is supported by an article review carried out in the academic directory Scopus.The information extracted from this catalog was processed in the VOSviewer software, through which the text mining, map of terms and networks of investigative action was carried out. The consumption of energy and resources of buildings, from the design stage; it has become the most studied research topic since 2015. The research detects niches of research in three areas: life cycle cost analysis, environmental impact, and social policies.

2019 ◽  
Vol 11 (8) ◽  
pp. 2444 ◽  
Author(s):  
Ming Hu

A comprehensive case study on life-cycle cost analysis (LCCA) was conducted on a two- story education building with a projected 40-year lifespan in College Park, Maryland. The aim of this paper was to (1) create a life cycle assessment model, using an education building to test the model, (2) compare the life cycle cost (LCC) of different renovation scenarios, taking into account added renewable energy resources to achieve the university’s overall carbon neutrality goal, and (3) verify the robustness of the LCC model by conducting sensitivity analysis and studying the influence of different variables. Nine renovation scenarios were constructed by combining six renovation techniques and three renewable energy resources. The LCCA results were then compared to understand the cost-effective relation between implementing energy reduction techniques and renewable energy sources. The results indicated that investing in energy-efficient retrofitting techniques was more cost-effective than investments in renewable energy sources in the long term. In the optimum scenario, renovation and renewable energy, when combined, produced close to a 90% reduction in the life cycle cost compared to the baseline. The payback period for the initial investment cost, including avoided electricity costs, varies from 1.4 to 4.1 years. This suggests that the initial investment in energy-efficient renovation is the primary factor in the LCC of an existing building.


Water ◽  
2021 ◽  
Vol 13 (20) ◽  
pp. 2922
Author(s):  
Wan-Ju Liao ◽  
Cheng-Li Cheng ◽  
Chao-Jung Lee

There are no regulations in Taiwan that clearly forbid the current practice of configuring a pipeline that passes through the floor of a condo to reach the ceiling of another condo downstairs with different ownership, giving rise to potential disputes during pipeline maintenance. In Japan and China, the regulations for water supply and the drainage system strictly forbid the installation of drainage pipes that pass through the floor of a condo to reach the ceiling of another condo downstairs. In this study, life cycle cost analysis was adopted to investigate the traditional piping system as well as the same-floor drainage system, including the descended floor piping system, the raised floor piping system and a pre-wall piping system. According to the results of the life cycle cost and benefit analysis for pipeline renewal and maintenance, and taking into account the overall pipeline construction cost, although adoption of the same-floor drainage system increases the total cost by about 0.3–2.7%, it shows benefits in terms of pipeline maintenance and construction time. From the perspective of property management, if the same-floor drainage system can be implemented in the initial design stage, operation and management related issues can be minimized to reduce both pipeline maintenance and management costs, achieving the best performance in sustainable construction and maintenance.


2016 ◽  
Vol 845 ◽  
pp. 326-331 ◽  
Author(s):  
Peter F. Kaming ◽  
Juli Marliansyah

Analysis of the life cycle cost of a design process that is important in controlling the initial costs and future costs in possession of an investment project. Therefore, there should be a life cycle cost analysis study to determine the cost of any category contained in the hostel building project in the area of Islamic Hospital jimbunmedika Kediri and also see how much the total cost incurred by a development project in the area of hospital hostel Islam jimbunmedika Kediri ranging from the design stage to the technical life of hostels set .The purpose of this study is, identify the service life of the building material components hostels on Hospital Grounds JimbunMedika Kediri, and make long-term plans of the building life cycle cost hostels in the area Jimbun Medika Kediri Hospital. From the results of the research, there are three groups that make up the life cycle cost is the cost of building, operating costs, and the cost of maintenance and replacement. For a long-term plan the life cycle cost of the costs and the percentage obtained as follows, development cost Rp.4.290.000.000 (46%), operational costs Rp. 3.799.333.250 (28%), maintenance and replacement costs Rp. 2.590.900.000 (26%).


Author(s):  
В.И. Баженов ◽  
А.В. Устюжанин ◽  
Е.А. Королева

Актуальность работы связана с повышением эффективности использования энергоресурсов. Начало реализованных объектов водопроводно-канализационного хозяйства с когенерацией относится к 2009 г.: АО «Мосводоканал» (Курьяновские и Люберецкие очистные сооружения, мощность по 10 МВт), АО «Водоканал» г. Иваново (2,55 МВт), МУП «Водоканал» г. Череповца (2,4 МВт). Стоимость жизненного цикла определялась на основе эксплуатационных затрат при ограничении условиями самоокупаемости проектов. Эксплуатационные затраты включали: газ, электроэнергию, тепловую энергию, расходы на запчасти, масло, персонал и др. Использование газопоршневых установок когенерации для компенсации потребности в энергоресурсах станций аэрации с воздуходувными агрегатами является экономически выгодным решением в условиях РФ. Это служит основанием для использования установок когенерации в проектах станций аэрации с близким расположением к магистральным газопроводам. Оптимистический и пессимистический сценарии развития этого направления зависят от желания водоканалов потреблять тепловую энергию. Стоимость очистки 1 м3 сточных вод может быть снижена: на 0,894/0,44 руб. для действующих воздуходувных агрегатов (с перерасходом электроэнергии 28% вследствие износа); на 0,644/0,317 руб. для современных воздуходувных агрегатов; на 0,688/0,361 руб. для современных управляемых воздуходувных агрегатов. Выгода от использования установок когенерации составляет 53,3%/36% и 56,9%/41% для неуправляемых и управляемых воздуходувных агрегатов соответственно. Капитальные затраты целесообразно рассматривать на этапе проектирования, включающем конкретные, объектно ориентированные запросы на изготовителя оборудования. The relevance of the work is associated with increasing the efficiency of the energy resources use. Commissioning water and wastewater treatment facilities with cogeneration dates back to 2009: Mosvodokanal JSC (Kurianovskie and Lyuberetskie treatment facilities, power 10 MW each), Vodokanal JSC, Ivanovo (2.55 MW), Cherepovets Vodokanal MUE (2.4 MW). The life cycle cost was determined on the basis of the operating costs subject to the constraints of the conditions of self-sufficient projects. The operating costs included: gas, electricity, heat energy, costs of spare parts, lubricant, personnel, etc. The use of gas engine cogeneration units to compensate for the needs of the wastewater treatment plants with blower units is an economically viable measure in the Russian Federation. This serves as the basis for the use of cogeneration units in projects of wastewater treatment plants located close to the main gas pipelines. Optimistic and pessimistic scenarios for the development of this area depend on the choice of vodokanals to use thermal energy. The cost of 1 m3of wastewater treatment can be reduced: by 0.894/0.44 rubles for the operating blower units (with 28% excess energy consumption due to wear); by 0.644/0.317 rubles for the advanced blower units; by 0.688/0.361 rubles for the advanced controlled blower units. The benefit from using cogeneration units is 53.3%/36% and 56.9%/41% for uncontrolled and controlled blower units, respectively. It makes sense to consider capital costs at the design stage that includes specific, object-oriented requests for the equipment manufacturer.


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