Design of electrotunable all-weather smart windows

Chowdhary, Ashish Kumar; Sikdar, Debabrata

doi:10.1016/j.solmat.2020.110921

Cited by 34 publications

(12 citation statements)

References 27 publications

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“…Recently, an organic crystal 4-N,N-dimethylamino-4 -N -methyl-stilbazolium tosylate (DAST) as an EO material [29] has been widely explored for various high-speed electrooptic applications and THz-wave generation [30,31]. It is also explored to design an all weather electro-tunable smart window [32] and a tunable color filter in an MIM cavity configuration using silver [33]. In this article, a simple approach has been proposed to design a dynamical tunable optical filter.…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of DAST Material-Assisted Photonic-Crystal-Based Electrical Tunable Optical Filter

2022

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In this paper, a 4-N,N-dimethylamino-4′-N′-methyl-stilbazolium tosylate (DAST) material assisted one-dimensional photonic-crystal-based (1D-PhC) tunable optical filter is presented. The design comprises a bilayer 1D-PhC structure having DAST as an electro-optic material. The device parameters are configured to filter out the 632.8 nm wavelength from the reflection spectrum. The analysis shows that by illuminating the device with poly-chromatic light at an incident angle of 45.07∘, the filtered wavelength exhibits transmission maxima having FWHM of less than 1nm. The analytical results also demonstrate the post fabrication 60 nm electrical tuning of the filtered wavelength by using only ±5 V applied potential. The structure also exhibits a very stable filter response up to 40% variations in optical thickness. Thus, the proposed design possesses the advantage in terms of low voltage wavelength tuning, stable response, easy fabrication and integration capability in integrated circuits.

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Section: Introductionmentioning

confidence: 99%

Performance Analysis of DAST Material-Assisted Photonic-Crystal-Based Electrical Tunable Optical Filter

2022

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“…Питанням енергоефективності світлопрозорих конструкцій займаються вчені Китаю, США, Англії, Індії, Кореї та країн Європейського союзу [4][5][6].…”

Section: постановка задачіunclassified

“…Пропонується для дизайнерів Китаю програмне забезпечення, як інтелектуальна підтримка прийняття рішень на ранніх етапах проектування офісних будівель з великими вікнами. Значна кількість публікацій по енергоефективності світлопрозорих елементів будівлі присвячена розробці «smart windows» (розумних вікон), які передбачають використання матеріалів, структура яких направлена на можливість динамічного контролю інтенсивності передачі сонячної радіації, залежно від кліматичних умов [5]. Також ряд досліджень присвячено застосуванню матеріалів для виготовлення склопакетів та рам, що підвищують енергоефективність вікон [6].…”

Section: постановка задачіunclassified

“…На сьогодні є багато напрацювань, як вітчизняних так і зарубіжних [5,6] по збільшенню енергоефективності вікон та склопакетів. Склопакети які наразі використовують забудовники на ринку житлового будівництва навіть найвищого класу енергоефективності (з використанням енергоефективного скління) не зрівняються за тепловтратами зі стіною.…”

Section: постановка задачіunclassified

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Heat Engineering Features of Transparent Fencing Structures of Buildings

Ratushnyak¹,

Pankevych²,

Pankevych³

2021

stmkvb

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The use of glass fencing structures - panoramic windows in the residential segment of modern city development is investigated. The peculiarities of the use of panoramic windows in the residential segment of the region are determined. An analysis of scientific publications in magazines with the impact - a factor and the approaches to increasing the energy efficiency of the thermal insulation shell of the building with glass elements of the facade are determined. The advantages and disadvantages of the use of panoramic windows in terms of heat engineering properties of a fencing structure are outlined. It is determined that according to the normative method of calculating the given thermal resistance, there may be a significant difference in calculating the entire facade and design for one room. To confirm the comparative calculation, which resulted in the resulting thermal resistance for a fragment of the facade (where there are two windows) is 3,3 m2 K / W (corresponding to the requirements of the normative value), and when calculating the fragment of this facade of a separate room with a panoramic window with a panoramic window. The result of the given thermal resistance is 2,6 m2 K / W (which is significantly lower than the normative value). The factors influencing the technical state of panoramic windows are outlined and lead to a decrease in the heat-insulating characteristics of the enclosing structures of the building; As well as measures and organizational and technical solutions, which allows the use of panoramic windows in modern housing construction. It is proposed for the heating of premises with panoramic windows of the scheme of placement of heating systems, namely: installation of vertical radiators on the side of the double-glazed windows; Planting a convector-type floor battery; arrangement of the system "Warm floor" and combined systems; internally floor convectors; infrared heaters; Installing slit or plinth convectors in the floor below the window, on the wall or ceiling. Recommended investors of new apartments to pay attention not only to the facade of the facade in the design decisions of external enclosures of buildings with the use of panoramic windows, as well as technical solutions of windows, ventilation and heating systems, which significantly affect the energy efficiency of the future apartment.

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“…Aluminum windows are essential parts of building envelopes, as they establish a connection/separation between indoor rooms and the external environment [ 1 , 2 ]. Due to their importance, aluminum windows should satisfy technical requirements for practice.…”

Section: Introductionmentioning

confidence: 99%

Deterioration Mechanisms and Advanced Inspection Technologies of Aluminum Windows

2022

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Aluminum windows are crucial components of building envelopes since they connect the indoor space to the external environment. Various external causes degrade or harm the functioning of aluminum windows. In this regard, inspecting the performance of aluminum windows is a necessary task to keep buildings healthy. This review illustrates the deterioration mechanisms of aluminum windows under various environmental conditions with an intention to provide comprehensive information for developing damage protection and inspection technologies. The illustrations reveal that moisture and chloride ions have the most detrimental effect on deteriorating aluminum windows in the long run, while mechanical loads can damage aluminum windows in a sudden manner. In addition, multiple advanced inspection techniques potential to benefit assessing aluminum window health state are discussed in order to help tackle the efficiency problem of traditional visual inspection. The comparison among those techniques demonstrates that infrared thermography can help acquire a preliminary defect profile of inspected windows, whereas ultrasonic phased arrays technology demonstrates a high level of competency in analyzing comprehensive defect information. This review also discusses the challenges in the scarcity of nanoscale corrosion information for insightful understandings of aluminum window corrosion and reliable window inspection tools for lifespan prediction. In this regard, molecular dynamics simulation and artificial intelligence technology are recommended as promising tools for better revealing the deterioration mechanisms and advancing inspection techniques, respectively, for future directions. It is envisioned that this paper will help upgrade the aluminum window inspection scheme and contribute to driving the construction of intelligent and safe cities.

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Design of electrotunable all-weather smart windows

Cited by 34 publications

References 27 publications

Performance Analysis of DAST Material-Assisted Photonic-Crystal-Based Electrical Tunable Optical Filter

Performance Analysis of DAST Material-Assisted Photonic-Crystal-Based Electrical Tunable Optical Filter

Heat Engineering Features of Transparent Fencing Structures of Buildings

Deterioration Mechanisms and Advanced Inspection Technologies of Aluminum Windows

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