scholarly journals Análise do desempenho térmico de habitação de interesse social com paredes de concreto em Uberlândia-MG

2021 ◽  
Vol 12 ◽  
pp. 1-20
Author(s):  
Roberta Bastos de Oliveira ◽  
Camila dos Reis Alves
Keyword(s):  
Energy Plus

O sistema construtivo de paredes de concreto tem sido amplamente utilizado na construção de habitações de interesse social (HIS). No entanto, questões relacionadas ao desempenho térmico necessitam de maiores estudos e atenção. Neste contexto, tem-se a avaliação do desempenho térmico segundo a ABNT NBR 15575:2013 de uma HIS construída com paredes de concreto moldado in loco na cidade de Uberlândia-MG. Inicialmente foi utilizado o método simplificado para avaliação do projeto real para a determinação do nível de desempenho térmico. Em seguida, foram simulados 6 cenários para o verão e para o inverno, de acordo com a orientação solar mais crítica. Para as análises, utilizou-se o software Energy Plus com as 8760 horas do ano. Trata-se de uma comparação entre os resultados obtidos e os requisitos normativos que preveem a comparação das temperaturas internas com as externas, bem como as internas com as temperaturas do dia típico. Como resultados, a HIS não atingiu os níveis mínimos para o método simplificado. Para as simulações, tem-se diversas análises comparativas quanto ao aumento ou redução das temperaturas internas nas zonas térmicas da edificação. O projeto real com beiral e paredes externas na cor clara atingiu o nível de desempenho térmico mínimo para o verão e para o inverno, no entanto, outras análises foram incorporadas possibilitando ponderações importantes. Faz-se uma crítica também quanto aos critérios normativos para desempenho térmico que destoaram entre si e à qualidade dos projetos que têm sido replicados na cidade sem uma preocupação com o usuário.

Energy Plus Phototherapy Clears Acne in Dark Skin

2008 ◽  
Vol 39 (6) ◽  
pp. 27
Author(s):  
SHARON WORCESTER
Keyword(s):  
Dark Skin ◽  
Energy Plus

Optimal Control Strategy for Ice-Storage System Based on Hourly Dynamic Load Simulation

2013 ◽  
Vol 671-674 ◽  
pp. 2515-2519
Author(s):  
Xue Mei Wang ◽  
Zhen Hai Wang ◽  
Xing Long Wu
Keyword(s):  
Optimal Control ◽  
Air Conditioning ◽  
Control Strategies ◽  
Storage System ◽  
Simulation Software ◽  
Ice Storage ◽  
Optimal Control Strategy ◽  
Air Conditioning System ◽  
Energy Plus ◽  
Load Simulation

This project aims to study the optimal control model of the ice-storage system which is theoretically close to the optimal control and also applicable to actual engineering. Using Energy Plus, the energy consumption simulation software, and the simple solution method of optimal control, researchers can analyze and compare the annual operation costs of the ice-storage air-conditioning system of a project in Beijing under different control strategies. Researchers obtained the power rates of the air-conditioning system in the office building under the conditions of chiller-priority and optimal contro1 throughout the cooling season. Through analysis and comparison, they find that after the implementation of optimal control, the annually saved power bills mainly result from non-design conditions, especially in the transitional seasons.

Performance investigation of an independent dedicated outdoor air system for energy-plus houses

2019 ◽  
Vol 146 ◽  
pp. 306-317 ◽  
Author(s):  
Min-Hwi Kim ◽  
Jong-Kyu Kim ◽  
Kyoung-Ho Lee ◽  
Nam-Choon Baek ◽  
Dong-Yong Park ◽  
...  
Keyword(s):  
Outdoor Air ◽  
Energy Plus ◽  
Air System

Perspectives of Talent Identification

2002 ◽  
Author(s):  
Joanne Haroutounian
Keyword(s):  
Student Behavior ◽  
Musical Training ◽  
Leadership Skills ◽  
Elementary Music ◽  
Group Activities ◽  
Energy Plus ◽  
Show Evidence ◽  
Vocal Quality ◽  
Music Class ◽  
Summer Storm

In part I the discussion of talent began with a poetic scene and ended with reflective after-thoughts, befitting the theoretical nature of the subject. The quest to recognize the spark of potential talent in young children brings us into the very real world of the school classroom. Suppose it is your task to observe student behavior in a third grade elementary music class and identify students who show evidence of potential talent. Your attention is drawn to the following students: . . . Student A is playing a melody from her music book on a xylophone. She decides to elaborate by creating a “variation.” Excited, she busily starts notating and revising her ideas on manuscript paper. . . . . . . Observation Notes: Musical training is evident. Performs with ease. Shows curiosity, creativity in musical tasks. An outstanding student. . . . . . . Student B is sitting in a listening center with headphones on, totally absorbed in the activity of circling patterns he hears. He taps his pencil as he listens, quickly working through the ear-training exercise. A quick check shows that his answers are correct. . . . . . . Observation Notes: Fine-tuned listening. Quite perceptive and quick in complex listening tasks. He is rather shy in group activities. . . . . . . Student C volunteers to sing and act out a solo in a cowboy song. He performs with confidence, singing in tune and with expression, obviously enjoying himself. His performance is met with spontaneous applause. . . . . . . Observation Notes: Quite a showman. Comfortable in front of an audience. Clear, clean vocal quality and intonation. Performs with personal flair. Shows leadership skills in group activities. Energy plus enthusiasm. . . . . . . Student D works with a number of Orff instruments, simply “fooling around” with sounds and rhythms. Each repetition shows a bit more development of an imaginative improvisation, which she describes as a “summer storm.” . . . . . . Observation Notes: Sensitive awareness of mood in music. Syncopated rhythms used in improvisation—retained well by ear. Adept at learning by ear. Not comfortable working with notation. . . . . . .

scholarly journals Linear Optimisation of a Settlement Towards the Energy-Plus House Standard

Energies ◽  
2019 ◽  
Vol 12 (2) ◽  
pp. 210 ◽  
Author(s):  
Matthias Slonski ◽  
Tobias Schrag
Keyword(s):  
Energy Efficiency ◽  
Open Source ◽  
Energy Efficient ◽  
Electrical Energy ◽  
Energy System ◽  
Heat Pumps ◽  
Building Type ◽  
Energy Plus ◽  
Linear Optimisation ◽  
House Standard

Future buildings will use technologies that are either well-known, innovative, or a combination thereof in order to be environmentally friendly and feasible at the same time. To evaluate and compare such systems through simulation, adaptive tools need to be available. This paper describes a conceived method for planning quarters and settlements. The novelty of this work emerges from the combination of a building simulation with a linear economic optimisation of the energy system, to achieve the energy-plus house standard for a settlement. Furthermore, the tools applied are adaptive or open source. In this article, a hypothetical basic example is given for a predefined idealised settlement, which consists of 132 single-family houses of one building type. The hourly demand for electrical energy and heat is established for three energy-efficiency classes for the building type with a dynamic simulation in MATLAB/SIMULINK using the CARNOT toolbox. This toolbox is also used to calculate the specific electrical energy production by photovoltaics. The components for the energy system of the settlement are implemented in the open source linear optimisation tool URBS. An economic optimum for the energy system of the settlement is found for each of the energy efficiency classes for an accumulated energy demand of the buildings. In this way, a lossless energy hub between the buildings is assumed. The results of the conducted simulations indicate that the optimal ratio of air/water to ground/water heat pumps shifts towards air/water heat pumps with more energy efficient houses. This is due to the lower specific investment costs, which outweigh the operational costs when less energy is required. The lowest costs for the entire energy system are for the one with the most energy efficient settlement. This is the case, as the costs for the higher energy standard of the buildings are not considered in the calculations. The behaviour of the optimisation is tested and discussed through a sensitivity analysis for one efficiency class. By presenting this simple, comprehensible example, an impression of the possible applications for this methodology is conveyed.

scholarly journals Use of Simple Telemetry to Reduce the Health Impacts of Fuel Poverty and Living in Cold Homes

2019 ◽  
Vol 16 (16) ◽  
pp. 2853 ◽  
Author(s):  
Adam Pollard ◽  
Tim Jones ◽  
Stephen Sherratt ◽  
Richard A. Sharpe
Keyword(s):  
Low Income ◽  
Social Enterprise ◽  
Cost Benefit ◽  
Well Being ◽  
Health Conditions ◽  
Household Energy ◽  
Average Temperature ◽  
Energy Plus ◽  
The Cost ◽  
Health And Well Being

Introduction: In Great Britain, roughly half of people with at least one long-standing illness (LSI) live in low-income households. Lower-income households are at risk of fuel poverty and living in a colder house, which can worsen certain health conditions, causing related morbidity and mortality. This pilot study aimed to assess whether raising occupants’ awareness of indoor temperatures in the home could initiate improved health and well-being among such vulnerable residents. Methods: Thermometers were placed inside a manufactured bamboo brooch to be worn or placed within homes during the winter of 2016/17. These devices were supplied to households (n = 34) already assisted by Community Energy Plus, which is a private social enterprise in Cornwall, United Kingdom (UK), using initiatives aimed at maintaining “healthy homes”. Questionnaires were supplied to households before devices were supplied, and then again at the end of a three-month period, with further questions asked when devices were collected. Temperatures were recorded automatically every half-hour and used to draw inference from questionnaire responses, particularly around health and well-being. Results: Questionnaires were completed by 22 households. Throughout the winter, those declaring the poorest health when supplied with devices maintained homes at a higher average temperature. There were also indications that those with raised awareness of interior temperatures sought fewer casual medicines. Conclusion: Simple telemetry could play a role in the management of chronic health conditions in winter, helping healthcare systems become more sustainable. The need for higher indoor temperatures among people with an LSI highlights the need to consider this approach alongside more sustainable household energy-efficiency improvements. A larger study is needed to explore this further and quantify the cost benefit of this approach.

scholarly journals Managing Energy Plus Performance in Data Centers and Battery-Based Devices Using an Online Non-Clairvoyant Speed-Bounded Multiprocessor Scheduling

2020 ◽  
Vol 10 (7) ◽  
pp. 2459 ◽  
Author(s):  
Pawan Singh ◽  
Baseem Khan ◽  
Om Prakash Mahela ◽  
Hassan Haes Alhelou ◽  
Ghassan Hayek
Keyword(s):  
Energy Management ◽  
Completion Time ◽  
Processing Time ◽  
Data Centers ◽  
Function Analysis ◽  
Multiprocessor Scheduling ◽  
Flow Time ◽  
Service Cost ◽  
Energy Plus ◽  
Time Required

An efficient scheduling reduces the time required to process the jobs, and energy management decreases the service cost as well as increases the lifetime of a battery. A balanced trade-off between the energy consumed and processing time gives an ideal objective for scheduling jobs in data centers and battery based devices. An online multiprocessor scheduling multiprocessor with bounded speed (MBS) is proposed in this paper. The objective of MBS is to minimize the importance-based flow time plus energy (IbFt+E), wherein the jobs arrive over time and the job’s sizes are known only at completion time. Every processor can execute at a different speed, to reduce the energy consumption. MBS is using the tradition power function and bounded speed model. The functioning of MBS is evaluated by utilizing potential function analysis against an offline adversary. For processors m ≥ 2, MBS is O(1)-competitive. The working of a set of jobs is simulated to compare MBS with the best known non-clairvoyant scheduling. The comparative analysis shows that the MBS outperforms other algorithms. The competitiveness of MBS is the least to date.

Effect of the Window Position in the Building Envelope on Energy Consumption

2018 ◽  
Vol 7 (3) ◽  
pp. 1861
Author(s):  
Neveen Y. Azmy ◽  
Rania E. Ashmawy
Keyword(s):  
Energy Consumption ◽  
Light Intensity ◽  
Environmental Performance ◽  
Lower Energy ◽  
Climatic Conditions ◽  
Building Envelope ◽  
Natural Lighting ◽  
Energy Plus ◽  
Window Position

Windows play a significant role as they largely influence the energy load. Although there are many studies on the energy-efficient windows design, there is still a lack in information about the mutual impact of windows’ size, position and orientation on the energy loads. In this paper, the effect of different window positions and orientations on the energy consumption in a typical room in an administrative building that is located in the hot climatic conditions of Cairo city, Egypt is considered. This case study has been modeled and analyzed to achieve good environmental performance for architectural space, as well as assessing its impact on the amount of natural lighting required by using the Energy Plus program. The study concludes that the WWR (Window Wall Ratio) 20% square north-oriented upper  opening consumes 25% lower energy than the rectangular 3:1 opening in the lower west-oriented façade. The upper openings are the highest in terms of light intensity, as they cover about 50% of the room area. The WWR 30% rectangular north-oriented upper 3:1 opening consumes 29% lower energy than the rectangular lower 3:1opening in the façade. Regarding light intensity, the upper openings are the best for natural lighting as the light covers more than 60% of the room area.                                                                                                                                                               

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