scholarly journals The Role of the Internal Heat Gains for Artificial Lighting on the Energy Performance of Buildings

2021 ◽  
Vol 39 (5) ◽  
pp. 1395-1404
Author(s):  
Guglielmina Mutani ◽  
Edoardo De Nicolò ◽  
Laura Blaso ◽  
Simonetta Fumagalli ◽  
Antonella Tundo
Keyword(s):  
Internal Heat ◽  
Energy Performance ◽  
Light Sources ◽  
Retirement Home ◽  
Climate Conditions ◽  
Artificial Lighting ◽  
Performance Indexes ◽  
Lighting Energy ◽  
Lighting Systems ◽  
Shading Devices

This paper aims to propose a procedure for calculating the energy performance indexes of buildings considering the seasonality of internal gains due to artificial lighting with a monthly quasi-steady-state energy balance. The proposed methodology evaluates the heat gains due to the integrated natural-artificial lighting system with the Lighting Energy Numerical Indicator (LENI). For the evaluation of buildings’ global energy performance and for some energy services, this contribution cannot be considered constant annually as depend strongly by climate conditions. The effect of daylighting, type of light sources-luminaires, building orientation and shading devices could influence lighting contribution of the internal heat gains. Then, the proposed methodology evaluates the internal heat gains with monthly energy balances. This methodology was applied to the case study of the "Brancaccio" retirement home in Matera (IT) for which the values of the energy performance indexes were compared with the standard normative approach using constant internal heat gains. The results of this work underline the importance of performing a detailed analysis that considers the availability of natural light in the different months of the year, the efficiency of the different lighting systems and their power installed per unit of area as a function of the lighting comfort requirements in the different types of environments.

scholarly journals A Supervisory Control Strategy for Improving Energy Efficiency of Artificial Lighting Systems in Greenhouses

Energies ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 202
Author(s):  
Gianluca Serale ◽  
Luca Gnoli ◽  
Emanuele Giraudo ◽  
Enrico Fabrizio
Keyword(s):  
Control Strategy ◽  
Light Emitting Diode ◽  
Cost Savings ◽  
Energy Performance ◽  
Lighting System ◽  
Light Emitting ◽  
Artificial Lighting ◽  
Lighting Control ◽  
Lighting Systems ◽  
Power Densities

Artificial lighting systems are used in commercial greenhouses to ensure year-round yields. Current Light Emitting Diode (LED) technologies improved the system efficiency. Nevertheless, having artificial lighting systems extended for hectares with power densities over 50W/m2 causes energy and power demand of greenhouses to be really significant. The present paper introduces an innovative supervisory and predictive control strategy to optimize the energy performance of the artificial lights of greenhouses. The controller has been implemented in a multi-span plastic greenhouse located in North Italy. The proposed control strategy has been tested on a greenhouse of 1 hectare with a lighting system with a nominal power density of 50 Wm−2 requiring an overall power supply of 1 MW for a period of 80 days. The results have been compared with the data coming from another greenhouse of 1 hectare in the same conditions implementing a state-of-the-art strategy for artificial lighting control. Results outlines that potential 19.4% cost savings are achievable. Moreover, the algorithm can be used to transform the greenhouse in a viable source of energy flexibility for grid reliability.

scholarly journals Evaluating Thermal and Lighting Energy Performance of Shading Devices on Kinetic Façades

2016 ◽  
Vol 8 (9) ◽  
pp. 883 ◽  
Author(s):  
Dong-Seok Lee ◽  
Sung-Han Koo ◽  
Yoon-Bok Seong ◽  
Jae-Hun Jo
Keyword(s):  
Energy Performance ◽  
Lighting Energy ◽  
Shading Devices

ENHANCING THE DAYLIGHT AND ENERGY PERFORMANCE OF EXTERNAL SHADING DEVICES IN HIGH-RISE RESIDENTIAL BUILDINGS IN DENSE URBAN TROPICS

2021 ◽  
Vol 16 (3) ◽  
pp. 87-108
Author(s):  
Nadeeka Jayaweera ◽  
Upendra Rajapaksha ◽  
Inoka Manthilake
Keyword(s):  
Residential Buildings ◽  
Residential Building ◽  
Energy Performance ◽  
Simulation Software ◽  
Baseline Scenario ◽  
Building Model ◽  
High Rise ◽  
Lighting Energy ◽  
Shading Devices

ABSTRACT This study examines the daylight and energy performance of 27 external shading scenarios in a high-rise residential building in the urban tropics. The cooling energy, daytime lighting energy and the spatial daylight autonomy (sDA) of the building model were simulated in Rhino3D and Grasshopper simulation software. The best performance scenario (vertical and horizontal shading on the twentieth floor, horizontal shading only for the eleventh floor and no shading for the second floor) satisfied 75 sDA(300lx|50) with corresponding annual enery performance of 16%–20% in the cardinal directions. The baseline scenario, which is the current practice of providing balconies on all floors, reduced daylight to less than 75 sDA on the eleventh and second floor, even though it had higher annual enery performance (19%–24%) than the best performance scenario. Application of the design principles to a case study indicated that 58% of the spaces had over 75 sDA for both Baseline and Best performance scenarios, while an increase in enery performance of 1%–3% was found in the Best performance scenario compared to the Baseline.

The impact of thermal mass on cold and hot climate zones of Portugal

2016 ◽  
Vol 26 (6) ◽  
pp. 733-743 ◽  
Author(s):  
Jorge S. Carlos
Keyword(s):  
Heat Capacity ◽  
Thermal Resistance ◽  
Energy Demand ◽  
Dynamic Modelling ◽  
Internal Heat ◽  
Energy Performance ◽  
Thermal Mass ◽  
Steady State Condition ◽  
Climate Conditions ◽  
The Impact

The aim of this paper is focused on the energy performance of buildings containing massive wall alternatives. The analysis comprised the comparison of the heating and cooling loads of seven characteristic wall configurations of one sample building with different dynamic internal heat capacity (ISO 13790:2008) in spite of the equal thermal resistance. The equal thermal resistance, as derived from simple steady-state condition, was imposed in order to allow research of effects solely attributed to the wall heat capacity on the building performance. A detached one floor dwelling exposed to different climate conditions in Portugal was analysed to illustrate the effect of the same wall in terms of energy demand during cold and hot weather conditions. A whole building dynamic modelling using EnergyPlus was employed for the energy analysis. The best thermal performance was obtained with massive walls that were located at the inner side, for a very heavy weight building and high building time constant.

The Evaluation of an Office Building According to LEED Certificate Lighting Criteria

2019 ◽  
pp. 41-48
Author(s):  
Idil Bakir Kucukkaya ◽  
Ebru Alakavuk
Keyword(s):  
Natural Resources ◽  
Industrial Revolution ◽  
Energy Savings ◽  
Environmental Design ◽  
Office Building ◽  
Artificial Lighting ◽  
Ecological Balance ◽  
Lighting Energy ◽  
Lighting Systems ◽  
Office Lighting

The progress in industrial and technological areas, which started with the Industrial Revolution, has deteriorated the ecological balance and depleted the natural resources. Sustainability, which initially seemed as a solution within this concept, became an important part of Interior Architecture as in disciplines related to design. The lighting systems of the offices that are the secondary living areas should be evaluated in terms of sustainability as well. In this paper, the energy savings and loss of the artificial office lighting systems has been calculated according to the ASHRAE/IES standard 90.1Ц20078?1 which are included in the Leadership in Energy and Environmental Design (LEED) certificateТs lighting criteria [1]. The wattage of the artificial lighting systems has been calculated while the systems were in use. The results of these measurements have been compared with lighting wattage and thus the lighting energy savings and loss have been configured. The office has been comparatively analyzed according to LEED criteria.

scholarly journals Heating, Cooling, and Lighting Energy Demand Simulation Analysis of Kinetic Shading Devices with Automatic Dimming Control for Asian Countries

2019 ◽  
Vol 11 (5) ◽  
pp. 1253 ◽  
Author(s):  
Byungyun Lee
Keyword(s):  
Total Energy ◽  
Energy Saving ◽  
Energy Demand ◽  
Energy Performance ◽  
Optimal Operation ◽  
Optimal Position ◽  
Energy Demands ◽  
Lighting Energy ◽  
Dimming Control ◽  
Shading Devices

Kinetic shading devices have recently been introduced for energy-saving and for their innovative appearance. Quantifiable research on kinetic operation systems is necessary to evaluate their applicability in a specific region. This study developed a theoretical methodology for producing an optimal positioning algorithm targeting minimizing total energy demands of kinetic shading devices; the control algorithms for hourly operation were tested through a combined analysis framework of energy performance simulations and spreadsheet analysis. Two common types of external shading devices, vertical-folding and horizontal-rotating types, were simulated in three Asian cities with different climate conditions. Automatic kinetic operation with a consequential dimming control was simulated on the east, south and west facade of an office building, selecting the optimal position every hour based on total energy demand for heating, cooling, and lighting. Comparative simulation analyses for kinetic operation and fixed shading demonstrated that the energy saving potential of fixed shading was greater than that of kinetic operation shading. Kinetic operation was the most applicable in Seoul, where seasonal optimal operation was required for both types of kinetic shadings. In Abu Dhabi and Hanoi, cooling and lighting energy demands were balanced every hour through kinetic operation. Rotating-type kinetic operation in these two regions resulted in better energy-saving performance. The operation frequency pattern of rotating-type kinetic shading provided more active operation and consequent outperformance over the folding-type.

scholarly journals Optimization of photoluminescent materials for lighting energy saving in the built environment

2021 ◽  
Vol 2042 (1) ◽  
pp. 012178
Author(s):  
C Chiatti ◽  
C Fabiani ◽  
A L Pisello
Keyword(s):  
Fossil Fuels ◽  
Emission Spectra ◽  
Light Sources ◽  
Improve Energy Efficiency ◽  
Heating And Cooling ◽  
Lighting Energy ◽  
Exciting Source ◽  
Lighting Systems ◽  
End Use ◽  
Photoluminescent Materials

Abstract In the last decades, fossil fuels have become the primary resource for electricity generation, contributing to the aggravation of problems like global warming and ozone depletion. For this reason, innovative solutions are being continuously developed in order to improve energy efficiency in the construction sector. Beyond heating and cooling, urban lighting plays a significant role on the final energy consumption of a city, including both indoors and outdoors. In this work, photoluminescent materials are investigated as possible light sources to be implemented in urban lighting systems, focusing on the free-cost and renewable luminous gain they provide after being exposed to a proper radiation. In particular, commercially available photoluminescent powders are evaluated by means of spectroradiometric techniques and using a specifically designed experimental setup. Measurements are repeated for different intensities and wavebands of irradiation to identify the most promising “pigment-lamp” combination in terms of (i) luminous intensity and (ii) photoluminescence duration. Results show that the shorter the distance between the emission spectra of the exciting source and the photoluminescent powder, the better the performance of the latter. Therefore, the choice of both afterglow and exciting source cannot be independent from the final system’s application and the required end-use lighting level.

scholarly journals The state of art in the horticulture lighting

2020 ◽  
Vol 12 (4) ◽  
pp. 100
Author(s):  
Marian Gilewski
Keyword(s):  
Activity Patterns ◽  
Automated System ◽  
Pharbitis Nil ◽  
Light Sources ◽  
Light Emitting ◽  
Artificial Lighting ◽  
Calcium Dependent ◽  
Dependent Protein ◽  
Lighting Systems ◽  
Technical Solutions

The article presents an overview of currently used greenhouse lighting systems. It does not apply to traditional sodium lighting systems, but only to the most modern LEDs. The publication presents descriptions of lamp designs, both foreign and Polish. The aim of the work is not only to review solutions, but also to identify the reasons for the low transfer of scientific and technical solutions to business. There are several barriers to overcome, mainly subjective ones, so that new solutions can be implemented and developed. Full Text: PDF ReferencesS. Ki-Ho, J. Yu-Min, O. Myung-Min, "Application of supplementary white and pulsed light-emitting diodes to lettuce grown in a plant factory with artificial lighting", Springer 57(6), 561 (2016). CrossRef M. Gilewski, "The role of light in the plants world", Phot. Lett. Poland 11, 4 (2019). CrossRef K.J. McCree, Agricultural Meteorology (Elsevier Publishing Company 1972). CrossRef G. Trouwborst, J. Oosterkamp, S. Hogewoning, V. Ieperen, "The application of LEDs as assimilation light source in greenhouse horticulture: A simulation study", the 6th Int. Symposium on Light in Horticulture. Tsukuba. Japan, Nov. 2009. CrossRef K. Jaworski, A. Szmidt-Jaworska, J. Kopcewicz, " Two calcium dependent protein kinases are differently regulated by light and have different activity patterns during seedling growth in Pharbitis nil", Springerlink.com, Journal: 10725, Article: 9609, 2011. CrossRef Philips Lighting, Horticultural LED lighting applications, 2020: https://www.lighting.philips.com/main/products/horticulture. DirectLink E. de Beer, P.H. van Baar, 3 reasons why intercanopy lighting is effective for high-wire vegetables, 2020: www.lighting.philips.com. DirectLink HLG, Refurbished HLG 550, 2020, https://horticulture-lightinggroup.com/collections/lamps/products/refurbished-hlg-550-v1 DirectLink Neonica Polska, 2020, www.growy.eu CrossRef I. Fryc, T. Dimitrova-Grekow, "An automated system for evaluation of the quality of light sources", 6th IEEE Lighting Conference of the Visegrad Countries : LUMEN V4, Sept. 2016. CrossRef EconoLux Ind. Ltd., "What Light do Plants Need", Hong Kong, 2016, http://econoluxindustries.com/light-plants-need.html. DirectLink Heliospectra AB, heliospectra DYNA, 2020, https://www.heliospectra.com/led-grow-lights/dyna. DirectLink Plantlux, Horticulture LED SMD lamp Plantalux XX640W, 2020, https://plantalux.pl/en/plantalux-xx640w-en/. DirectLink M. Gilewski, "An Adaptive and Monoculture Oriented LEDs Lamp", 978-1-5386-7924-1/18/$31.00 ©2018 IEEE, 2018. CrossRef

scholarly journals Measurements and Simulation Study of Daylight Availability and Its Impact on the Heating, Cooling and Lighting Energy Demand in an Educational Building

Energies ◽  
2020 ◽  
Vol 13 (10) ◽  
pp. 2555
Author(s):  
Joanna Rucińska ◽  
Adrian Trząski
Keyword(s):  
Energy Balance ◽  
Energy Demand ◽  
Energy Performance ◽  
Primary Energy ◽  
Calculation Model ◽  
Simulation Software ◽  
Zero Energy Building ◽  
Lighting Energy ◽  
Lighting Systems ◽  
The Impact

This paper deals with the impact of the use of daylight on the overall energy demand for heating, cooling, and lighting in educational buildings. The energy performance of buildings is currently of the utmost importance as current European regulations, starting from 31st December 2020 impose that all new buildings must meet nearly zero-energy building requirements. This paper presents a study of the illuminance distribution in an educational room obtained from measurements and simulation results using two different models. One of the models, integrated with a thermal simulation software, was used to estimate the impact of daylight on the energy demand. The analysis included the use of various window types, lighting control system, reference point location, and daylight calculation model for a sample room in an educational building. Results of the analysis indicate that, due to the high share of lighting demand (reaching up to 78% of the primary energy balance), there is a need to take into account the efficiency of lighting systems during the design process to correctly determine the actual energy balance of a building, increase the quality of the design of lighting systems, as well as to select the optimal parameters of windows.

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