Analyzing Two Federal Building Integrated Photovoltaics Projects Using ENERGY-10 Simulations

Solar Energy ◽  
2002 ◽  
Author(s):  
Andy Walker ◽  
Norm Weaver ◽  
Gregory Kiss ◽  
Doug Balcomb ◽  
Melinda Becker-Humphry
Keyword(s):  
Energy Efficiency ◽  
Building Design ◽  
Environmental Research ◽  
Integrated Analysis ◽  
Test Cases ◽  
Electrical Load ◽  
Building Projects ◽  
Improve Energy Efficiency ◽  
Building Integrated Photovoltaics ◽  
Wide Range

A new version of the ENERGY-10 computer program simulates the performance of photovoltaic systems, in addition to a wide range of opportunities to improve energy efficiency in buildings. This paper describes two test cases in which the beta release of ENERGY-10 version 1.4 was used to evaluate energy efficiency and building-integrated photovoltaics (BIPV) for two Federal building projects: a 16,000-ft2 (1,487 m2) office and laboratory building at the Smithsonian Astrophysical Laboratory in Hilo, Hawaii, and housing for visiting scientists [three 1400-ft2 (130 m2) and three 1564-ft2 (145 m2) houses] at the Smithsonian Environmental Research Center in Edgewater, Maryland. The paper describes the capabilities of the software, the method in which ENERGY-10 was used to assist in the design, and a synopsis of the results. The results indicate that ENERGY-10 is an effective tool for evaluating BIPV options very early in the building design process. By simulating both the building electrical load and simultaneous PV performance for each hour of the year, the ENERGY-10 program facilitates a highly accurate, integrated analysis.

scholarly journals Analyzing Two Federal Building-Integrated Photovoltaics Projects Using ENERGY-10 Simulations

2003 ◽  
Vol 125 (1) ◽  
pp. 28-33 ◽  
Author(s):  
Andy Walker ◽  
Doug Balcomb ◽  
Gregory Kiss ◽  
Norm Weaver ◽  
Melinda Humphry Becker
Keyword(s):  
Energy Efficiency ◽  
Peak Load ◽  
Cost Savings ◽  
Environmental Research ◽  
Integrated Analysis ◽  
Building Projects ◽  
Improve Energy Efficiency ◽  
Building Integrated Photovoltaics ◽  
Pv Systems ◽  
Wide Range

A new version of the ENERGY-10 computer program simulates the performance of photovoltaic (PV) systems and evaluates a wide range of opportunities to improve energy efficiency in buildings. This paper describes two test cases in which the beta release of ENERGY-10 version 1.4 was used to evaluate energy efficiency and building-integrated photovoltaics (BIPV) for two federal building projects: an office and laboratory building at the Smithsonian Astrophysical Laboratory (SAO) in Hilo, Hawaii, and housing for visiting scientists at the Smithsonian Environmental Research Center in Edgewater, Maryland. The capabilities of the software, the design assistance provided by ENERGY-10, and a synopsis of results are given. Estimates of annual energy delivery by the five PV arrays of the SAO are compared to F-Chart to help inform a validation of ENERGY-10. Results indicate that, by simulating both the building electrical load and simultaneous PV performance for each hour of the year, ENERGY-10 facilitates a highly accurate, integrated analysis useful early in the design process. The simulation is especially useful in calculating the effect of PV on the building peak load, and associated demand cost savings.

scholarly journals Data Analytics to Improve Customer Energy Efficiency

2021 ◽  
Vol 9 (6) ◽  
pp. 13-25
Author(s):  
Michail Angelopoulos ◽  
Yannis Pollalis
Keyword(s):  
Energy Efficiency ◽  
Information And Communication Technologies ◽  
Analytical Data ◽  
Analytical Framework ◽  
Research Information ◽  
Improve Energy Efficiency ◽  
Econometric Methods ◽  
Wide Range ◽  
Information And Communication ◽  
Study Participants

This research focuses on providing insights for a solution for collecting, storing, analyzing and visualizing data from customer energy consumption patterns. The data analysis part of our research provides the models for knowledge discovery that can be used to improve energy efficiency at both producer and consumer ends. Τhe study sets a new analytical framework for assessing the role of behavioral knowledge in energy efficiency using a wide range of Case Studies, Experiments, Research, Information and Communication Technologies (ICT) in combination with the most modern econometric methods and large analytical data taking into account the characteristics of the study participants (household energy customers).

scholarly journals Comparative Analysis of BIPV Solutions to Define Energy and Cost-Effectiveness in a Case Study

Energies ◽  
2020 ◽  
Vol 13 (15) ◽  
pp. 3827 ◽  
Author(s):  
Paolo Corti ◽  
Luisa Capannolo ◽  
Pierluigi Bonomo ◽  
Pierluigi De Berardinis ◽  
Francesco Frontini
Keyword(s):  
Energy Efficiency ◽  
Cost Effectiveness ◽  
Cost Effective ◽  
Building Design ◽  
Building Envelope ◽  
Building Integrated Photovoltaics ◽  
Research And Innovation ◽  
Cost Parameters ◽  
Design Options

The built environment remains a strategic research and innovation domain in view of the goal of full decarbonization. The priority is the retrofitting of existing buildings as zero-emission to improve their energy efficiency with renewable energy technologies pulling the market with cost-effective strategies. From the first age of photovoltaics (PV) mainly integrated in solar roofs, we rapidly moved towards complete active building skins where all the architectural surfaces are photoactive (Building Integrated Photovoltaics - BIPV). This change of paradigm, where PV replaces a conventional building material, shifted the attention to relate construction choices with energy and cost effectiveness. However, systematic investigations which put into action a cross-disciplinary approach between construction, economic and energy related domains is still missing. This paper provides the detailed assessment of a real multifamily building, taking into account retrofit scenarios for making active the building skin, with the goal to identify the sensitive aspects of the energetic and economic effectiveness of BIPV design options. By assuming a real case study with monitored data, the analysis will consider a breakdown of the main individual parts composing the building envelope, by then combining alternative re-configurations in merged clusters with different energy and construction goals. Results will highlight the correlation between building skin construction strategies and the energy and cost parameters by identifying the cornerstones for enhancing efficiency. The outcomes, related to the total life cost, self-consumption/sufficiency, in combination with different building design options (façade, roof, balconies, surface orientations, etc.), provide a practical insight for researchers and professionals to identify renovation strategies by synergistically exploiting the solar active parts towards lower global costs and higher energy efficiency of the whole building system.

scholarly journals Design Corrections in Spanish Office Buildings to Improve Energy Efficiency in the Face of Climate Change

2020 ◽  
Vol 5 (12) ◽  
pp. 114
Author(s):  
José A. Orosa ◽  
Diego Vergara ◽  
Feliciano Fraguela ◽  
Pablo Fernández-Arias
Keyword(s):  
Climate Change ◽  
Energy Efficiency ◽  
Energy Consumption ◽  
Carbon Dioxide Emissions ◽  
Natural Ventilation ◽  
Thermal Inertia ◽  
Building Design ◽  
Wall Structure ◽  
Intergovernmental Panel ◽  
Improve Energy Efficiency

The majority of buildings in Europe are at present naturally ventilated and do not use heating or cooling equipment throughout the summer. However, this idea is changing and as a result heating ventilation air conditioning (HVAC) related energy consumption has been rising in the recent years. On the other hand, predictions published by the intergovernmental Panel on Climate Change (IPCC) indicate an annual warming rate ranging between 0.1 and 0.4 °C. In the present study, the ISO 13790:2011 standard has been employed to analyze the effect of building design corrections over the energy saving of a real building during its mean life and under climatic change predictions. In this sense, the effect of climate change, ventilation rate and its energetic and carbon dioxide emissions implications are obtained for the next 15 years. The results obtained indicate that an increment in the air changes by natural ventilation will be more effective than changing the wall structure and, in consequence, the thermal inertia. In particular, it was obtained that an increase of natural ventilation will always reduce the energy consumption and that this consumption will be lower with time due to an increment of an average outdoor air temperature. This modification will allow reduced cooling energy peak demands during the summer season and improve indoor ambiences in mild regions and the energy efficiency.

scholarly journals Exploiting Read/Write Asymmetry to Achieve Opportunistic SRAM Voltage Switching in Dual-Supply Near-Threshold Processors

2018 ◽  
Vol 8 (3) ◽  
pp. 28
Author(s):  
Yunfei Gu ◽  
Dengxue Yan ◽  
Vaibhav Verma ◽  
Pai Wang ◽  
Mircea Stan ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Energy Efficient ◽  
Switching Scheme ◽  
Promising Technique ◽  
Improve Energy Efficiency ◽  
Wide Range ◽  
Speed Up ◽  
On Chip ◽  
Voltage Switching ◽  
Near Threshold

Energy-efficient microprocessors are essential for a wide range of applications. While near-threshold computing is a promising technique to improve energy efficiency, optimal supply demands from logic core and on-chip memory are conflicting. In this paper, we perform static reliability analysis of 6T SRAM and discover the variance among different sizing configuration and asymmetric minimum voltage requirements between read and write operations. We leverage this asymmetric property i n near-threshold processors equipped with voltage boosting capability by proposing an opportunistic dual-supply switching scheme with a write aggregation buffer. Our results show that proposed technique improves energy efficiency by more than 21.45% with approximate 10.19% performance speed-up.

scholarly journals A Survey on Energy Efficiency in Information Systems

2014 ◽  
Vol 23 (03) ◽  
pp. 1450001 ◽  
Author(s):  
Monica Vitali ◽  
Barbara Pernici
Keyword(s):  
Information Technology ◽  
Energy Efficiency ◽  
Energy Consumption ◽  
Information Systems ◽  
State Of The Art ◽  
Green It ◽  
Improve Energy Efficiency ◽  
Wide Range ◽  
Points Of View ◽  
Green Information Technology

Concerns about energy and sustainability are growing everyday involving a wide range of fields. Even Information Systems (ISs) are being influenced by the issue of reducing pollution and energy consumption and new fields are rising dealing with this topic. One of these fields is Green Information Technology (IT), which deals with energy efficiency with a focus on IT. Researchers have faced this problem according to several points of view. The purpose of this paper is to understand the trends and the future development of Green IT by analyzing the state-of-the-art and classifying existing approaches to understand which are the components that have an impact on energy efficiency in ISs and how this impact can be reduced. At first, we explore some guidelines that can help to understand the efficiency level of an organization and of an IS. Then, we discuss measurement and estimation of energy efficiency and identify which are the components that mainly contribute to energy waste and how it is possible to improve energy efficiency, both at the hardware and at the software level.

scholarly journals Exploiting Read/Write Asymmetry to Achieve Opportunistic SRAM Voltage Switching in Dual-Supply Near-Threshold Processors

2018 ◽  
Author(s):  
Yunfei Gu ◽  
Dengxue Yan ◽  
Vaibhav Verma ◽  
Pai Wang ◽  
Mircea Stan ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Energy Efficient ◽  
Switching Scheme ◽  
Promising Technique ◽  
Improve Energy Efficiency ◽  
Wide Range ◽  
Speed Up ◽  
On Chip ◽  
Voltage Switching ◽  
Near Threshold

Energy-efficient microprocessors are essential for a wide range of applications. While near-threshold computing is a promising technique to improve energy efficiency, optimal supply demands from logic core and on-chip memory are conflicting. In this paper, we perform static reliability analysis of 6T SRAM and discover the variance among different sizing configuration and asymmetric minimum voltage requirements between read and write operations. We leverage this asymmetric property in near-threshold processors equipped with voltage boosting capability by proposing an opportunistic dual-supply switching scheme with a write aggregation buffer. Our results show that proposed technique improves energy efficiency by more than 21.45% with approximate 10.19% performance speed-up.

Contributions Regarding the Energy Efficiency Increasing for a Hotel Building in order to Ensure a Healthy Indoor Environment

2018 ◽  
Vol 880 ◽  
pp. 329-334
Author(s):  
Mădălina Xenia Călbureanu ◽  
Raluca Malciu ◽  
Calin Mihnea Calbureanu
Keyword(s):  
Energy Efficiency ◽  
Active Role ◽  
Energy Performance ◽  
Building Envelope ◽  
Outdoor Environment ◽  
Pollutant Emissions ◽  
Indoor Climate ◽  
Improve Energy Efficiency ◽  
Increase Energy Efficiency ◽  
Wide Range

This paper purpose is to provide recommendations after a thermal energy analysis and inspection of a hotel building and its related facilities, in order to increase energy efficiency saving primary resources, to ensure a healthy indoor climate for users, and last but not least to ensure a reduction of CO2 emissions in order to ensure an external environment with low pollutant emissions. All the carried out analysis has as main objective to consider a symbiosis between all the parameters involved (energy, indoor/outdoor environment, comfort), when a building (envelope and installations) is renovated, especially when excess in order to save energy tend to endanger the indoor climate. Non-invasive methods were used to inspect the building by using thermo-vision both for the building envelope and for inspection of existing installations. The building utilities bills were analyzed for a period of one year to highlight current energy performance. The given recommendations achieve the proposed goal and highlight the active role of building management, continuous monitoring of energy and utilities to assess and improve energy efficiency, and ultimately to minimize specific energy costs. The results of this study can be used successfully on a wide range of hotel buildings in Romania.

Contributions Regarding the Implementation Nzeb Concept in Existing Public Buildings

2020 ◽  
Vol 896 ◽  
pp. 329-336
Author(s):  
Mădălina Xenia Călbureanu ◽  
Raluca Malciu ◽  
Diana Mara Calbureanu ◽  
Anca Mihaela Barbu
Keyword(s):  
Energy Efficiency ◽  
Active Role ◽  
Energy Performance ◽  
Building Envelope ◽  
Pollutant Emissions ◽  
Indoor Climate ◽  
Public Buildings ◽  
Improve Energy Efficiency ◽  
Increase Energy Efficiency ◽  
Wide Range

This paper purpose is to provide recommendations for a public buildings – hospital - x in order to increase energy efficiency, saving primary resources, to ensure a healthy indoor climate for users, and last but not least to ensure a reduction of CO2 emissions in order to ensure an external environment with low pollutant emissions. After the thermal expertise of this building, the carried out analysis has as main objective to consider all the parameters involved (installations, insulations, indoor environment, comfort). Along with rehabilitation of a public building (envelope and installations), especially it is necessary to save energy but not to endanger the indoor climate. Non-invasive methods were used to inspect the building by using thermo-vision both for the building envelope and for inspection of existing installations. All the entering parameters such as utilities bills were analyzed for a period of one year to highlight current energy performance. The given recommendations achieve the proposed goal and highlight the active role of building management, continuous monitoring of energy and utilities to assess and improve energy efficiency, and ultimately to minimize specific energy costs. The results of this study can be used successfully on a wide range of hospital buildings in Romania.

scholarly journals Exploiting Read/Write Asymmetry to Achieve Opportunistic SRAM Voltage Switching in Dual-Supply Near-Threshold Processors

2018 ◽  
Author(s):  
Yunfei Gu ◽  
Dengxue Yan ◽  
Vaibhav Verma ◽  
Pai Wang ◽  
Mircea R. Stan ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Energy Efficient ◽  
Switching Scheme ◽  
Promising Technique ◽  
Improve Energy Efficiency ◽  
Wide Range ◽  
Speed Up ◽  
On Chip ◽  
Voltage Switching ◽  
Near Threshold

Energy-efficient microprocessors are essential for a wide range of applications. While near-threshold computing is a promising technique to improve energy efficiency, optimal supply demands from logic core and on-chip memory are conflicting. In this paper, we perform static reliability analysis of 6T SRAM and discover the variance among different sizing configuration and asymmetric minimum voltage requirements between read and write operations. We leverage this asymmetric property in near-threshold processors equipped with voltage boosting capability by proposing an opportunistic dual-supply switching scheme with a write aggregation buffer. Our results show that proposed technique improves energy efficiency by more than 21.45% with approximate 10.19% performance speed-up.

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