scholarly journals Establish high-resolution hourly weather data for simulating building energy consumption in different regions

2019 ◽  
Vol 111 ◽  
pp. 04032
Author(s):  
Feng-Yi Lin ◽  
Ruey-Lung Hwang ◽  
Tzu-Ping Lin
Keyword(s):  
Energy Consumption ◽  
Urban Areas ◽  
Reference Value ◽  
Weather Conditions ◽  
Buffer Zone ◽  
Building Energy ◽  
Weather Data ◽  
Weather Factors ◽  
Set Up ◽  
The City

Due to the various local weather conditions in different regions of the city, the demand for air conditioning (AC) of housing is different, too. It happened occasionally to underestimate the energy consumption of AC in urban areas, because of using suburban/rural weather station data for building energy simulation. This study set up 34 automatic weather stations in the urban area of Tainan City, Taiwan for a year-round collection of local temperature and relative humidity data. Those weather measurement, the GIS information of a buffer zone and multiple regression analysis were used to establish the relationship between the weather factors, needed for the morphing approach, and the parameters of landscape use and cover. The buffer zone is an area of 1000×1000 m2 around the measured point, and is divided to two layers with upwind and downwind parts. Local hourly weather-year files for a whole of the city with a resolution of 200×200 m2 were generated by the morphing approach. With the different local hourly weather-year files, the AC-required hours and energy consumption from May to October for a typical residential with hybrid ventilation mode was obtained by using the EnergyPlus. And the cumulative UHI of each grid between May and October is calculated by taking the average of the five lowest temperatures as the reference value. The result shows that the number of AC hours of residential will increase by 10%, and the energy consumption increase from 1000 kWh to 2500 kWh, when long-term UHI intensity increases from 2000 °C-hour to 9000 °C-hour.

scholarly journals The Impact Assessment of Climate Change on Building Energy Consumption in Poland

Energies ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 4084
Author(s):  
Hassan Bazazzadeh ◽  
Peiman Pilechiha ◽  
Adam Nadolny ◽  
Mohammadjavad Mahdavinejad ◽  
Seyedeh sara Hashemi safaei
Keyword(s):  
Climate Change ◽  
Energy Consumption ◽  
Thermal Load ◽  
Building Energy ◽  
Building Energy Consumption ◽  
Building Sector ◽  
Energy Demands ◽  
Heating Load ◽  
The Impact ◽  
The City

A substantial share of the building sector in global energy demand has attracted scholars to focus on the energy efficiency of the building sector. The building’s energy consumption has been projected to increase due to mass urbanization, high living comfort standards, and, more importantly, climate change. While climate change has potential impacts on the rate of energy consumption in buildings, several studies have shown that these impacts differ from one region to another. In response, this paper aimed to investigate the impact of climate change on the heating and cooling energy demands of buildings as influential variables in building energy consumption in the city of Poznan, Poland. In this sense, through the statistical downscaling method and considering the most recent Typical Meteorological Year (2004–2018) as the baseline, the future weather data for 2050 and 2080 of the city of Poznan were produced according to the HadCM3 and A2 GHG scenario. These generated files were then used to simulate the energy demands in 16 building prototypes of the ASHRAE 90.1 standard. The results indicate an average increase in cooling load and a decrease in heating load at 135% and 40% , respectively, by 2080. Due to the higher share of heating load, the total thermal load of the buildings decreased within the study period. Therefore, while the total thermal load is currently under the decrease, to avoid its rise in the future, serious measures should be taken to control the increased cooling demand and, consequently, thermal load and GHG emissions.

scholarly journals A new clustering and visualization method to evaluate urban energy planning scenarios

2018 ◽  
Author(s):  
Sara Torabi Moghadam ◽  
Silvia Coccolo ◽  
Guglielmina Mutani ◽  
Patrizia Lombardi ◽  
Jean Louis Scartezzini ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Urban Areas ◽  
Energy Demand ◽  
Planning Process ◽  
Energy Transition ◽  
Climatic Conditions ◽  
Energy Planning ◽  
Transition Strategies ◽  
Urban Energy ◽  
The City

The spatial visualization is a very useful tool to help decision-makers in the urban planning process to create future energy transition strategies, implementing energy efficiency and renewable energy technologies in the context of sustainable cities. Statistical methods are often used to understand the driving parameters of energy consumption but rarely used to evaluate future urban renovation scenarios. Simulating whole cities using energy demand softwares can be very extensive in terms of computer resources and data collection. A new methodology, using city archetypes is proposed, here, to simulate the energy consumption of urban areas including urban energy planning scenarios. The objective of this paper is to present an innovative solution for the computation and visualization of energy saving at the city scale.The energy demand of cities, as well as the micro-climatic conditions, are calculated by using a simplified 3D model designed as function of the city urban geometrical and physical characteristics. Data are extracted from a GIS database that was used in a previous study. In this paper, we showed how the number of buildings to be simulated can be drastically reduced without affecting the accuracy of the results. This model is then used to evaluate the influence of two set of renovation solutions. The energy consumption are then integrated back in the GIS to identify the areas in the city where refurbishment works are needed more rapidly. The city of Settimo Torinese (Italy) is used as a demonstrator for the proposed methodology, which can be applied to all cities worldwide with limited amount of information.

scholarly journals Impacts of Microclimate Conditions on the Energy Performance of Buildings in Urban Areas

Buildings ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 189 ◽  
Author(s):  
Javanroodi ◽  
M.Nik
Keyword(s):  
Urban Areas ◽  
Energy Demand ◽  
Weather Conditions ◽  
Energy Performance ◽  
Urban Morphology ◽  
Weather Data ◽  
Architectural Form ◽  
Energy Performance Of Buildings ◽  
Microclimate Conditions ◽  
The Impact

Urbanization trends have changed the morphology of cities in the past decades. Complex urban areas with wide variations in built density, layout typology, and architectural form have resulted in more complicated microclimate conditions. Microclimate conditions affect the energy performance of buildings and bioclimatic design strategies as well as a high number of engineering applications. However, commercial energy simulation engines that utilize widely-available mesoscale weather data tend to underestimate these impacts. These weather files, which represent typical weather conditions at a location, are mostly based on long-term metrological observations and fail to consider extreme conditions in their calculation. This paper aims to evaluate the impacts of hourly microclimate data in typical and extreme climate conditions on the energy performance of an office building in two different urban areas. Results showed that the urban morphology can reduce the wind speed by 27% and amplify air temperature by more than 14%. Using microclimate data, the calculated outside surface temperature, operating temperature and total energy demand of buildings were notably different to those obtained using typical regional climate model (RCM)–climate data or available weather files (Typical Meteorological Year or TMY), i.e., by 61%, 7%, and 21%, respectively. The difference in the hourly peak demand during extreme weather conditions was around 13%. The impact of urban density and the final height of buildings on the results are discussed at the end of the paper.

Long-Run Urban Growth with Agglomeration Economies

1987 ◽  
Vol 19 (8) ◽  
pp. 1083-1092 ◽  
Author(s):  
T Miyao
Keyword(s):  
Urban Growth ◽  
Urban Areas ◽  
Urban Economy ◽  
Agglomeration Economies ◽  
Urban Growth Model ◽  
Steady Growth ◽  
Long Run ◽  
Growth Equilibrium ◽  
Set Up ◽  
The City

It is widely recognized that agglomeration economies are a crucially important factor in explaining the existence and growth of urban areas, and therefore should be explicitly taken into consideration in long-run urban growth analysis. Once such economies are introduced, however, the urban economy tends to diverge from a steady state equilibrium and may ‘explode’ without limit. A possible way to solve this dilemma is shown. First, a simple urban growth model with production and factor migration functions in the presence of agglomeration economies is set up. It is proved that the urban economy with agglomeration economies tends to approach a kind of balanced growth path in the long run, although the growth rate itself is accelerating without limit. It is also shown that if the total demand for the output of the city is growing at an exogenously given rate, a sustainable steady growth equilibrium exists and is unique and globally stable. Then, land is introduced to show that the availability of the third factor of production will make it more likely to achieve a steady growth equilibrium in the presence of agglomeration economies. Last, the model is generalized to include many factors of production.

Continuous Monitoring, Modeling, and Evaluation of Actual Building Energy Systems

2014 ◽  
Author(s):  
Maxim L. Sankey ◽  
Sheldon M. Jeter ◽  
Trevor D. Wolf ◽  
Donald P. Alexander ◽  
Gregory M. Spiro ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Real Time ◽  
Continuous Monitoring ◽  
Energy System ◽  
Building Energy ◽  
Energy Performance ◽  
Weather Data ◽  
Practical Procedure ◽  
Heating And Cooling ◽  
Institute Of Technology

Residential and commercial buildings account for more than 40% of U.S. energy consumption, most of which is related to heating, ventilation and air conditioning (HVAC). Consequently, energy conservation is important to building owners and to the economy generally. In this paper we describe a process under development to continuously evaluate a building’s heating and cooling energy performance in near real-time with a procedure we call Continuous Monitoring, Modeling, and Evaluation (CMME). The concept of CMME is to model the expected operation of a building energy system with actual weather and internal load data and then compare modeled energy consumption with actual energy consumption. For this paper we modeled two buildings on the Georgia Institute of Technology campus. After creating our building models, internal lighting loads and equipment plug-loads were collected through electrical sub-metering, while the building occupancy load was recorded using doorway mounted people counters. We also collected on site weather and solar radiation data. All internal loads were input into the models and simulated with the actual weather data. We evaluated the building’s overall performance by comparing the modeled heating and cooling energy consumption with the building’s actual heating and cooling energy consumption. Our results demonstrated generally acceptable energy performance for both buildings; nevertheless, certain specific energy inefficiencies were discovered and corrective actions are being taken. This experience shows that CMME is a practical procedure for improving the performance of actual well performing buildings. With improved techniques, we believe the CMME procedure could be fully automated and notify building owners in real-time of sub-optimal building performance.

scholarly journals Greenhouse Gas Pollution Based on Energy use and its Mitigation Potential in the City of Surakarta, Indonesia

2020 ◽  
Vol 52 (1) ◽  
pp. 1
Author(s):  
Prabang Setyono ◽  
Widhi Himawan ◽  
Cynthia Permata Sari ◽  
Totok Gunawan ◽  
Sigit Heru Murti
Keyword(s):  
Energy Consumption ◽  
Greenhouse Gas ◽  
Urban Areas ◽  
Energy Use ◽  
Carbon Sink ◽  
Ghg Emissions ◽  
Electricity Consumption ◽  
Vegetation Density ◽  
Rate Of Increase ◽  
The City

Considered as a trigger of climate change, greenhouse gas (GHG) is a global environmental issue. The City of Surakarta in Indonesia consists mainly of urban areas with high intensities of anthropogenic fossil energy consumption and, potentially, GHG emission. It is topographically a basin area and most likely prompts a Thermal Inversion, creating a risk of accumulation and entrapment of air pollutants or GHGs at low altitudes. Vegetation has been reported to mitigate the rate of increase in emissions because it acts as a natural carbon sink. This study aimed to mitigate the GHG emissions from energy consumption in Surakarta and formulate recommendations for control. It commenced with calculating the emission factors based on the IPCC formula and determining the key categories using the Level Assessment approach. It also involved computing the vegetation density according to the NDVI values of the interpretation of Sentinel 2A imagery. The estimation results showed that in 2018, the emission loads from the energy consumption in Surakarta reached 1,217,385.05 (tons of CO2e). The key categories of these emissions were electricity consumption, transportation on highways, and the domestic sector, with transportation on highways being the top priority. These loads have exceeded the local carrying capacity because they create an imbalance between emission and natural GHG sequestration by vegetations.

scholarly journals WARUNG TEGAL: RELASI KAMPUNG MENYANGGA KOTA JAKARTA (Studi Kasus Pada Warung Tegal di Jakarta Timur)

2018 ◽  
Vol 1 (2) ◽  
pp. 159
Author(s):  
Maflahah Maflahah ◽  
Akhmad Ramdhon
Keyword(s):  
Social Capital ◽  
Informal Sector ◽  
Urban Areas ◽  
Buffer Zone ◽  
Point Of View ◽  
Formal Sector ◽  
Mutual Cooperation ◽  
Purposive Sampling ◽  
Big City ◽  
The City

<p>Abstract : Low of skills and education background lead Tegal society was unable to access the economic formal sector in urban areas. Then, they choose the informal sectors such as street vendors, pedicab, and others to get money. Warung Tegal is one of to be a solution to keep them alive in the city. Warung Tegal become one of the solution to address this problem, moreover Warung Tegal is does not need high education and specific skills to do. The purpose of this research is to identified how Warung Tegal as a informal sector can stay and keep growing as high as city’s development to be a buffer the economic of the city. Theory that use in this research is Pierre Bourdieu’s social capital. The method that use in this research is qualitative research. The approach that use is case study and the sampling method is purposive sampling. Warung Tegal can be one of solution that can stay and compete in economic of the city. It prove that Warung Tegal can give a economic welfare to Tegal society. It can be seen that there are a lot of warteg with high persistent, mutual cooperation, and high social capital between warteg seller give a power to each other to stay in the city. Although they live in a long term in Jakarta, but they do not forget their hometown. Aplusan is a chance for them to back to their hometown. Tegal that seen as a village and Jakarta as a big city can make a strong bond between them. The conclution is Warung Tegal as a informal sector give a different point of view of city, not just a city that full of luxury but a city that look through informal sector as economic buffer zone.<br />Keywords : City, informal sector, social capital, village, warung tegal</p><p>Abstrak : Rendahnya keterampilan dan latar belakang pendidikan menyebabkan masyarakat Tegal tidak dapat mengakses sektor formal ekonomi di daerah perkotaan. Kemudian, mereka memilih sektor informal seperti pedagang kaki lima, becak, dan lain-lain untuk mendapatkan uang. Warung Tegal adalah salah satu solusi untuk membuat mereka tetap hidup di kota. Warung Tegal menjadi salah satu solusi untuk mengatasi masalah ini, terlebih lagi Warung Tegal tidak membutuhkan pendidikan tinggi dan keterampilan khusus untuk melakukannya. Tujuan dari penelitian ini adalah untuk mengidentifikasi bagaimana Warung Tegal sebagai sektor informal dapat tetap dan terus tumbuh setinggi perkembangan kota untuk menjadi penyangga ekonomi kota. Teori yang digunakan dalam penelitian ini adalah modal sosial Pierre Bourdieu. Metode yang digunakan dalam penelitian ini adalah penelitian kualitatif. Pendekatan yang digunakan adalah studi kasus dan metode pengambilan sampel adalah purposive sampling. Warung Tegal dapat menjadi salah satu solusi yang dapat bertahan dan bersaing dalam ekonomi kota. Ini membuktikan bahwa Warung Tegal dapat memberikan kesejahteraan ekonomi bagi masyarakat Tegal. Dapat dilihat bahwa ada banyak warteg dengan persistensi, kerja sama timbal balik, dan modal sosial yang tinggi antara penjual warteg memberikan kekuatan untuk satu sama lain untuk tinggal di kota. Meskipun mereka hidup dalam jangka panjang di Jakarta, tetapi mereka tidak melupakan kampung halaman mereka. Aplusan adalah kesempatan bagi mereka untuk kembali ke kampung halaman mereka. Tegal yang dilihat sebagai desa dan Jakarta sebagai kota besar dapat membuat ikatan yang kuat di antara mereka. Kesimpulannya adalah Warung Tegal sebagai sektor informal memberikan sudut pandang yang berbeda dari kota, bukan hanya kota yang penuh kemewahan tetapi kota yang melihat melalui sektor informal sebagai zona penyangga ekonomi.</p><p>Kata Kunci: Kota, sektor informal, modal sosial, desa, warung tegal</p>

scholarly journals Protection of Natural Wetlands through Landscape Design in Kigali City

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Rahman Tafahomi ◽  
Reihaneh Nadi
Keyword(s):  
Urban Areas ◽  
Task Force ◽  
Public Awareness ◽  
Well Being ◽  
Positive Influence ◽  
Landscape Design ◽  
Vital Role ◽  
And Performance ◽  
Set Up ◽  
The City

The city of Kigali has been experiencing rapid growth in recent years. The city enjoys a variety of natural features such as wetland, valley, hill, and great scenery, however, fast expansion of urban areas and human activities could pose a serious threat to the natural environment, and the ecological sustainability. While wetlands, as nature’s kidneys, bring obvious benefits to both ecology and the socioeconomic environment, they have currently faced several problems in Kigali, such as pollution and the risk of decline in the area. This research is aimed at protection of wetland areas through landscape design, which could have a positive influence on maintaining the natural balance of ecology, as well as citizens’ health and well-being. The site study was Kiyovu wetland as one of large wetlands playing a vital role in the city’s character and spatial structure. The research employed observation, questionnaire, and mapping techniques, and the random sample consisted of 37 residents, workers, passers-by, and young people. Findings revealed that safety, environmental issues, accessibility, recreational activities, and quality of the wetland, were significant factors in order of priority that respondents had stressed over the design of the wetland landscape concept. The proposed concept highlighted recreation areas and the connection with other wetlands and green areas as a whole in the city, and it was derived from survey, mapping the results of questionnaires, and feedback from participants. In conclusion, Kiyovu wetland has an enormous capacity to put the idea of green magnet into effect across the city. However, the protection of wetlands without 1. Site-specific ecological landscape plans representing strategic and design levels in periods of time, 2. Legal requirements, and 3. Public awareness about impacts of wetlands degradation would be far less effective. To set up a campaign and a task force to examine changes can make a huge difference to levels of progress and performance

scholarly journals Evaluation of Multiyear Weather Data Effects on Hygrothermal Building Energy Simulations Using WUFI Plus

Energies ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 7157
Author(s):  
Michele Libralato ◽  
Alessandra De Angelis ◽  
Giulia Tornello ◽  
Onorio Saro ◽  
Paola D’Agaro ◽  
...  
Keyword(s):  
Building Materials ◽  
Moisture Transfer ◽  
Weather Conditions ◽  
Building Energy ◽  
Building Envelope ◽  
Weather Data ◽  
Building Simulations ◽  
Coupled Heat And Moisture ◽  
Single Number ◽  
Energy Simulations

Transient building energy simulations are powerful design tools that are used for the estimation of HVAC demands and internal hygrothermal conditions of buildings. These calculations are commonly performed using a (often dated) typical meteorological year, generated from past weather measurements excluding extreme weather conditions. In this paper the results of multiyear building simulations performed considering coupled Heat and Moisture Transfer (HMT) in building materials are presented. A simple building is simulated in the city of Udine (Italy) using a weather record of 25 years. Performing a multiyear simulation allows to obtain a distribution of results instead of a single number for each variable. The small therm climate change is shown to influence thermal demands and internal conditions with multiyear effects. From this results it is possible to conclude that weather records used as weather files have to be periodically updated and that moisture transfer is relevant in energy and comfort calculations. Moreover, the simulations are performed using the software WUFI Plus and it is shown that using a thermal model for the building envelope could be a non negligible simplification for the comfort related calculations.

scholarly journals Energy Consumption Verification of SPD Smart Window, Controllable According to Solar Radiation in South Korea

Energies ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 5643
Author(s):  
Yujin Ko ◽  
Hyogeun Oh ◽  
Hiki Hong ◽  
Joonki Min
Keyword(s):  
Energy Consumption ◽  
Suspended Particle ◽  
Electricity Consumption ◽  
Energy Requirements ◽  
Weather Data ◽  
Smart Window ◽  
Smart Windows ◽  
Reduce Energy Consumption ◽  
The City ◽  
Made In

Between 60% and 70% of the total energy load of a house or office occurs through the exteriors of the building, and in the case of offices, heat loss from windows and doors can approach 40%. A need for glass that can artificially control the transmittance of visible light has therefore emerged. Smart windows with suspended particle device (SPD) film can reduce energy consumption by responding to environmental conditions. To measure the effect of SPD windows on the energy requirements for cooling and heating in Korea, we installed a testbed with SPD windows. With TRNSYS18, the comparison between measurements and simulation has been made in order to validate the simulation model with respect to the modeling of an SPD window. Furthermore, the energy requirements of conventional and SPD-applied windows were compared and analyzed for a standard building that represented an actual office building. When weather for the city of Anseong and a two-speed heat pump were used to verify the simulation, the simulated electricity consumption error compared with the testbed was −1.0% for cooling and −0.9% for heating. The annual electricity consumption error was −0.9%. When TMY2 Seoul weather data were applied to the reference building, the decrease in electricity consumption for cooling in the SPD model compared with the non-SPD model was 29.1% and the increase for heating was 15.8%. Annual electricity consumption decreased by 4.1%.

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