Nanometer optical coating based visibly tinted films with 24-h sub-atmospheric passive cooling

2021 ◽  
Author(s):  
Sun-Kyung Kim ◽  
Eun-Joo Lee ◽  
Jin-Woo Cho ◽  
Young-Seok Kim
Keyword(s):  
Passive Cooling ◽  
Optical Coating

Impact of roof shading on building energy performance in warm & humid climatic places of India

2020 ◽  
pp. 50-64
Author(s):  
Kuladeep Kumar Sadevi ◽  
Avlokita Agrawal
Keyword(s):  
Energy Consumption ◽  
Energy Conservation ◽  
Energy Performance ◽  
General Assumption ◽  
Climatic Conditions ◽  
Building Envelope ◽  
Passive Cooling ◽  
Base Case ◽  
U Value ◽  
The Impact

With the rise in awareness of energy efficient buildings and adoption of mandatory energy conservation codes across the globe, significant change is being observed in the way the buildings are designed. With the launch of Energy Conservation Building Code (ECBC) in India, climate responsive designs and passive cooling techniques are being explored increasingly in building designs. Of all the building envelope components, roof surface has been identified as the most significant with respect to the heat gain due to the incident solar radiation on buildings, especially in tropical climatic conditions. Since ECBC specifies stringent U-Values for roof assembly, use of insulating materials is becoming popular. Along with insulation, the shading of the roof is also observed to be an important strategy for improving thermal performance of the building, especially in Warm and humid climatic conditions. This study intends to assess the impact of roof shading on building’s energy performance in comparison to that of exposed roof with insulation. A typical office building with specific geometry and schedules has been identified as base case model for this study. This building is simulated using energy modelling software ‘Design Builder’ with base case parameters as prescribed in ECBC. Further, the same building has been simulated parametrically adjusting the amount of roof insulation and roof shading simultaneously. The overall energy consumption and the envelope performance of the top floor are extracted for analysis. The results indicate that the roof shading is an effective passive cooling strategy for both naturally ventilated and air conditioned buildings in Warm and humid climates of India. It is also observed that a fully shaded roof outperforms the insulated roof as per ECBC prescription. Provision of shading over roof reduces the annual energy consumption of building in case of both insulated and uninsulated roofs. However, the impact is higher for uninsulated roofs (U-Value of 3.933 W/m2K), being 4.18% as compared to 0.59% for insulated roofs (U-Value of 0.33 W/m2K).While the general assumption is that roof insulation helps in reducing the energy consumption in tropical buildings, it is observed to be the other way when insulation is provided with roof shading. It is due to restricted heat loss during night.

Passive Cooling of Glazing Surfaces using Solar Chimneys

2016 ◽  
pp. 625-629 ◽  
Author(s):  
A. Al Touma ◽  
K. Ghali ◽  
N. Ghaddar
Keyword(s):  
Passive Cooling

scholarly journals Thermal condition in Semarang Cathedral’s passive cooling system

2018 ◽  
Author(s):  
Augi Sekatia ◽  
Bangun I. R. Harsritanto ◽  
Erni Setyowati ◽  
Gagoek Hardiman
Keyword(s):  
Thermal Condition ◽  
Cooling System ◽  
Passive Cooling ◽  
Passive Cooling System

A novel and effective passive cooling strategy for photovoltaic panel

2021 ◽  
Vol 145 ◽  
pp. 111164
Author(s):  
Sandro Nižetić ◽  
Mišo Jurčević ◽  
Duje Čoko ◽  
Müslüm Arıcı
Keyword(s):  
Passive Cooling ◽  
Photovoltaic Panel ◽  
Cooling Strategy

Passive cooling of large-area organic light-emitting diodes

2013 ◽  
Vol 14 (8) ◽  
pp. 1939-1945 ◽  
Author(s):  
Philipp Schwamb ◽  
Thilo C.G. Reusch ◽  
Christoph J. Brabec
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Passive Cooling ◽  
Large Area ◽  
Light Emitting ◽  
Organic Light

scholarly journals Passive cooling designs to improve heat resilience of homes in underserved and vulnerable communities

2021 ◽  
pp. 111383
Author(s):  
Kaiyu Sun ◽  
Wanni Zhang ◽  
Zhaoyun Zeng ◽  
Ronnen Levinson ◽  
Max Wei ◽  
...  
Keyword(s):  
Passive Cooling ◽  
Vulnerable Communities

Optical coating design algorithm based on the equivalent layers theory

2006 ◽  
Vol 45 (7) ◽  
pp. 1530 ◽  
Author(s):  
Alexander V. Tikhonravov ◽  
Michael K. Trubetskov ◽  
Tatiana V. Amotchkina ◽  
Alfred Thelen
Keyword(s):  
Optical Coating ◽  
Design Algorithm ◽  
Coating Design
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