scholarly journals Analysis of Energy Performance and Integrated Optimization of Tubular Houses in Southern China Using Computational Simulation

2021 ◽  
Vol 11 (20) ◽  
pp. 9371
Author(s):  
Jing Wang ◽  
Weijun Gao ◽  
Zhu Wang ◽  
Liting Zhang
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Southern China ◽  
Computational Simulation ◽  
Energy Performance ◽  
Natural Ecosystem ◽  
Saving Rate ◽  
Unique Type ◽  
Architectural Form ◽  
Integrated Optimization

Chinese rural construction is currently booming, but faces considerable challenges in terms of energy performance. The objective of this research was to analyze the energy performance of tubular houses, which are a unique type of rural house in southern China, with a particular architectural form and environmental adaptations. Previous field measurements showed that there was much room for improvement, with both winter and summer cases requiring particular attention. Numerical simulations of the annual energy consumption were conducted using Open-Studio. The results show that various levels of reduction in energy consumption (varying from 1.6% to 30.5%) were achieved by combining different renovations. Among them, using solar energy with a sunroom was found to be the most effective approach, with an energy-saving rate of 28%, followed by the approach of attaching insulation to the walls and roof, with an energy-saving rate ranging from 13.2% to 30.5%. The integrated optimization measures had an energy-saving rate of 47.4% with a total renovation cost of CNY 41,143.1, and the payback period of investment was within five years. If a tubular house with improved thermal insulation can be inherited as a component in the process of urbanization, it will aid in energy conservation and natural ecosystem protection for southern China.

scholarly journals Assessment of Energy Saving Potential by Replacing Conventional Materials by Cross Laminated Timber (CLT)—A Case Study of Office Buildings in China

2019 ◽  
Vol 9 (5) ◽  
pp. 858 ◽  
Author(s):  
Yu Dong ◽  
Xue Cui ◽  
Xunzhi Yin ◽  
Yang Chen ◽  
Haibo Guo
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Southern China ◽  
Computational Simulation ◽  
Northern China ◽  
Office Buildings ◽  
Reference Structure ◽  
Cross Laminated Timber ◽  
Climatic Regions ◽  
Heating And Cooling

This research evaluates the operational heating and cooling energy consumption of cross-laminated timber (CLT) office buildings in China. The evaluations involve a comparison of the energy consumption of a reference RC structure and CLT system office buildings. Computational simulation results are based on IES-VE 2019 and show that the estimated heating energy saving ratio of CLT buildings in Harbin, Beijing, Shanghai, and Kunming to the reference structure are 11.97%, 22.11%, 30.94%, and 23.30% respectively. However, the CLT buildings consume more energy for cooling in the summer. The results of the research show significantly higher heating energy reductions for CLT buildings in the Cold Region and Severe Cold Regions of China. Thus, the application of the CLT system is better suited to northern China than southern China. The results of the research can be used in further assessment of the use of CLT systems in different climatic regions in China.

scholarly journals Reduction of Energy Intensity in Broiler Facilities: Methodology and Strategies

2021 ◽  
Vol 8 ◽  
Author(s):  
Catherine Baxevanou ◽  
Dimitrios Fidaros ◽  
Ilias Giannenas ◽  
Eleftherios Bonos ◽  
Ioannis Skoufos
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Thermal Energy ◽  
Energy Intensity ◽  
Electrical Energy ◽  
Energy Performance ◽  
Advanced Technology ◽  
Energy Audit ◽  
Wind Potential ◽  
Technology Level

Broiler facilities consume a lot of energy resulting in natural source depletion and greater greenhouse gas emissions. A way to assess the energy performance of a broiler facility is through an energy audit. In the present paper, an energy protocol for an energy audit is presented covering both phases of data collection and data elaboration. The operational rating phase is analytically and extendedly described while a complete mathematical model is proposed for the asset rating phase. The developed energy audit procedure was applied to poultry chambers located in lowland and mountainous areas of Epirus Greece for chambers of various sizes and technology levels. The energy intensity indices varied from 46 to 89 kWh/m2 of chamber area 0.25–0.48 kWh/kg of produced meat or 0.36–1.3 kWh/bird depending on the chamber technology level (insulation, automation, etc.) and the location where the unit was installed. The biggest energy consumer was heating followed by energy consumption for ventilation and cooling. An advanced technology level can improve energy performance by ~ 27%−31%. Proper insulation (4–7 cm) can offer a reduction of thermal energy consumption between 10 and 35%. In adequately insulated chambers, the basic heat losses are due to ventilation. Further energy savings can be achieved with more precise ventilation control. Automation can offer additional electrical energy saving for cooling and ventilation (15–20%). Energy-efficient lights can offer energy saving up to 5%. The use of photovoltaic (PV) technology is suggested mainly in areas where net-metering holds. The use of wind turbines is feasible only when adequate wind potential is available. Solar thermal energy is recommended in combination with a heat pump if the unit's heating and cooling systems use hot/cold water or air. Finally, the local production of biogas with anaerobic fermentation for producing thermal or electrical energy, or cogenerating both, is a choice that should be studied individually for each farm.

scholarly journals Energy performance of single family houses in Serbia: Analysis of calculation procedures

2019 ◽  
Vol 23 (Suppl. 5) ◽  
pp. 1695-1705
Author(s):  
Dimitrije Manic ◽  
Mirko Komatina ◽  
Biljana Vucicevic ◽  
Marina Jovanovic
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Dynamic Simulation ◽  
Simulation Method ◽  
Energy Performance ◽  
Building Envelope ◽  
Test Case ◽  
Existing Buildings ◽  
Single Family ◽  
Steady State Method

Energy certification of buildings in Serbia was introduced in 2011 and energy label depends on energy need for heating per unit floor area of heated space, calculated by the fully prescribed monthly quasi-steady-state method defined by ISO 13790. In the Republic of Serbia, most of families live in single-family houses built before the energy certification of buildings was introduced. Therefore, the estimation of energy performance of the existing buildings is important for labeling, and evaluation of energy saving measures and energy strategies to be implemented. This paper examines the applicability of monthly method defined by National legislation on the existing buildings stock in Serbia, by comparing it to the more accurate dynamic simulation method. Typical single-family houses are taken as a test case, since they are responsible for about 76% of energy consumption for heating. The results show that the dynamic simulation method estimates 21% to 54% higher energy need for heating, compared to the monthly method. Also, the monthly method estimates up to 13% higher savings by typical building envelope energy saving measures, compared to the dynamic simulation. This paper recommends improvement in procedures for calculation of building energy performance index to better assess energy consumption, effects of energy saving measures, and create solid background for developing and implementing of energy saving strategies.

scholarly journals Energy Efficiency of Novel Interior Surface Layer with Improved Thermal Characteristics and Its Effect on Hygrothermal Performance of Contemporary Building Envelopes

Energies ◽  
2020 ◽  
Vol 13 (8) ◽  
pp. 2012 ◽  
Author(s):  
Jan Fořt ◽  
Jiří Šál ◽  
Jan Kočí ◽  
Robert Černý
Keyword(s):  
Energy Consumption ◽  
Energy Savings ◽  
Computational Simulation ◽  
Thermal Characteristics ◽  
Energy Performance ◽  
Climatic Conditions ◽  
Heat Fluxes ◽  
Passive Cooling ◽  
Fuel Price ◽  
Climate Conditions

Facing the consequences of climate change and fuel price rises, the achievement of the requirements for low-energy consumption of buildings has become a challenging issue. On top of that, increased demands on indoor hygrothermal conditions usually require the utilization of additional heating, ventilation, and air-conditioning (HVAC) systems to maintain a comfortable environment. On this account, several advanced and modern materials are widely investigated as a promising way for reduction of the buildings’ energy consumption including utilization of passive heating/cooling energy. However, the efficiency and suitability of passive strategies depending on several aspects including the influence of location, exterior climatic conditions, load-bearing materials used, and insulation materials applied. The main objective of this study consists of the investigation of the energy performance benefits gained by the utilization of advanced materials in plasters by computational modeling. Results obtained from a computational simulation reveal the capability of the studied passive cooling/heating methods on the moderation of indoor air quality together with the reduction of the diurnal temperature fluctuation. Achieved results disclose differences in terms of energy savings for even small variation in outdoor climate conditions. Additionally, the effectivity of passive cooling/heating alters considerably during the summer and winter periods. Based on the analysis of simulated heat fluxes, the potential energy savings related to improved thermal properties of the applied plaster layer reached up to 12.08% and thus represent an interesting passive solution towards energy sustainability to meet the criteria on modern buildings.

Energy Factor Analysis in Modular Product

2011 ◽  
Vol 130-134 ◽  
pp. 1314-1317
Author(s):  
Qing Di Ke ◽  
Hong Chao Zhang ◽  
Guang Fu Liu ◽  
Bing Bing Li
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Modular Design ◽  
Design Method ◽  
Energy Performance ◽  
Physical Parameters ◽  
Physical Analysis ◽  
Energy Factor ◽  
Modular Product ◽  
Energy Equations

Nowadays, due to the huge energy consumption, the energy-saving problems of the product have been emphasized with many designers. In this paper, informed by the modular design method, the total energy performance in modular product can be analyzed and separated into the energy performances of basic modules. And with the physical analysis of basic modules, the energy equations are established with the band graphs theory. Then, the physical parameters, which could influence the energy consumption, are identified as “energy factor”. Thus, the energy consumption of the modules could be optimized with adjusting design factors, and the energy-saving design scheme for the whole product is obtained in the optimized model. Finally, the model and the method in this paper are demonstrated by an instance of the crank block pump.

Research on Energy Consumption for Heating from Implementing “50% Energy-Saving Standard” and “65% Energy-Saving Standard”

2012 ◽  
Vol 608-609 ◽  
pp. 1246-1251
Author(s):  
Li Bai ◽  
Zhao Chen ◽  
Jia Rui Chu
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Residential Building ◽  
Saving Rate ◽  
Calculated Energy ◽  
Reducing Ability ◽  
Changchun City

This paper uses energy consumption stimulation software DeST-h to carry out stimulation study on annual energy consumption for heating of a typical residential building in Changchun city, a city in frigid area. We respectively calculated energy consumption under conditions of implementing “50% energy-saving standard” and “65% energy-saving standard”, calculated the energy-saving rate, and did research on energy-saving ability, economy, emission-reducing ability of different energy-saving standards.

scholarly journals Bermed Earth-Sheltered Wall for Low-Income House: Thermal and Energy Measure to Face Climate Change in Tropical Region

2021 ◽  
Vol 11 (1) ◽  
pp. 420
Author(s):  
Ivan Julio Apolonio Callejas ◽  
Raquel Moussalem Apolonio ◽  
Emeli Lalesca Aparecida da Guarda ◽  
Luciane Cleonice Durante ◽  
Karyna de Andrade Carvalho Rosseti ◽  
...  
Keyword(s):  
Climate Change ◽  
Global Warming ◽  
Energy Consumption ◽  
Low Income ◽  
Computational Simulation ◽  
Tropical Climate ◽  
Energy Performance ◽  
Tropical Region ◽  
Base Scenario ◽  
Responsive Design

Climate change impact is one of the most important global concerns at present. In the building environment, climate-responsive design may help to enhance the adaptation capacity through a better building energy performance. In this sense, this study addresses an adaptation strategy to reduce the effects of global warming on low-income houses, for which bioclimatic passive strategies should be prioritized, aiming to improve environmental sustainability. The technique chosen to be analyzed is thermal mass for cooling. Thus, the goal is to evaluate the energy consumption and thermal performance impact of implementing bermed earth-sheltered walls on bedrooms in low-income housing (LIH), considered deployed in tropical climate regions. For that, a base scenario (1961–1990) is considered, alongside two future scenarios: 2020 (2011 to 2040) and 2050 (2041 to 2070), both considering the effects of climate change, according to the Fourth Report (AR4) of the Intergovernmental Panel on Climate Change (IPCC). The methodologies adopted are (i) computational simulation to estimate the annual energy consumption demand and (ii) quantification of the cooling degree-hours (CDH), with the subsequent comparative analysis based on Brazilian regulation for energy efficiency in buildings (RTQ-R). The predictions show that there will be an increase in the energy consumption for cooling and in the CDH in both 2020 and 2050 scenarios, regardless of using a bermed earth-sheltered wall. Nonetheless, this adaptive measure enables the building to be resilient in terms of cooling energy demand in the 2020s, since it is 12.3% lower than in the building without the strategy use, compared with the base scenario. In the 2050s, resilience was almost reached with energy consumption only 10.7% higher, for the same conditions described previously. Therefore, bermed earth-sheltered walls work as a climate-responsive design strategy to face the potential global warming effects, promoting building sustainability in tropical climate regions.

scholarly journals Trends of Energy Performance Certification of Buildings in Azerbaijan

2018 ◽  
Vol 7 (3.2) ◽  
pp. 563
Author(s):  
Samira Akbarova ◽  
. .
Keyword(s):  
European Union ◽  
Energy Consumption ◽  
Energy Saving ◽  
Energy Performance ◽  
Building Codes ◽  
Construction Sector ◽  
The European Union ◽  
Certification System ◽  
Energy Auditing ◽  
World Trend

Energy consumption by construction sector is estimated by multi- disciplinary energy auditing and results are represented in an energy performance building certificate. The building certification, which is a world trend today, is applied successfully for many buildings  inAzerbaijantoo. The purpose of this paper to study the current methodology of energy building certification in terms of the technological aspects of energy auditing. Many documents of the European Union directives and Russian building codes and regulations in the field of ecology and energy saving in construction sector have been revised for implementing them as base for national energy performance certification system AZERI GREEN ZOOM. The assessment categories and main requirements have been considered. The results of this overview have shown the trends and problems in this field.  There are given examples of certified buildings.  

scholarly journals A comparative benchmarking study of multi-storey residential buildings in two periods of energy saving efforts: the 1980s and the 2010s

2021 ◽  
Vol 2069 (1) ◽  
pp. 012075
Author(s):  
O M Jensen ◽  
J Rose ◽  
J Kragh ◽  
C H Christiansen ◽  
M Grimmig ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Residential Buildings ◽  
Measurement Data ◽  
Building Energy ◽  
Energy Performance ◽  
Building Energy Performance ◽  
Heated Area ◽  
Energy Signature ◽  
Change Point Models

Abstract In 1990, Technological Institute (TI) in Denmark made a benchmarking study of 92 typical multi-storey buildings covering 23 000 dwellings. The study included measurement data from the 1970s and the years after the energy crises. This study showed that over a period of less than 20 years a significant reduction in energy consumption took place. In a new similar study, TI and Aalborg University have analysed 62 buildings covering 18 000 dwellings including measurement data from the last 20 years. This time, the data covers a period with an increasing focus on the carbon-emission impacts of energy consumption. As opposed to the first benchmarking study, the new 20-years study shows that the heat consumption has been almost constant over the last 20 years. This paper presents a comparative study of the two sets of measurements and evaluates energy saving efforts and individual building energy performance. Furthermore, the paper compares two different ways of deriving benchmarks from the data and demonstrates how utilizing change-point models/energy signature as opposed to the more traditional mean annual values per heated area, significantly increases the usability.

scholarly journals Top Energy Saver of the Year: Results of an Energy Saving Competition in Public Buildings

2020 ◽  
Vol 24 (3) ◽  
pp. 278-293
Author(s):  
Jan Kaselofsky ◽  
Ralf Schüle ◽  
Marika Rošā ◽  
Toms Prodaņuks ◽  
Anda Jekabsone ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Energy Use ◽  
Residential Buildings ◽  
Electricity Consumption ◽  
Energy Performance ◽  
Heat Consumption ◽  
The European Union ◽  
Public Building ◽  
Team Members

AbstractNon-residential buildings in the European Union consume more than one third of the building sector’s total. Many non-residential buildings are owned by municipalities. This paper reports about an energy saving competition that was carried out in 91 municipal buildings in eight EU member states in 2019. For each public building an energy team was formed. The energy teams’ activities encompassed motivating changes in the energy use behaviour of employees and small investments. Two challenges added an element of gamification to the energy saving competition. To assess the success of the energy saving competition, an energy performance baseline was calculated using energy consumption data of each public building from previous years. Energy consumption in the competition year was monitored on a monthly base. After the competition the top energy savers from each country were determined by the percentage-based reduction of energy consumption compared to the baseline. On average, the buildings had an electricity and heat consumption in 2019 that was about 8 % and 7 %, respectively, lower than the baseline. As an additional data source for the evaluation, a survey among energy team members was conducted at the beginning and after the energy competition. Support from superiors, employee interest and motivation and behaviour change as assessed by energy team members show a positive, if weak or moderate, correlation with changes in electricity consumption, but not with changes in heat consumption.

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