Problem Definition Study of Requirements for Vapor Retarders in the Building Envelope.

1982 ◽  
Author(s):  
P. Reece Achenbach ◽  
Trechsel Sr. ◽  
Heinz R.
Keyword(s):  
Building Envelope ◽  
Problem Definition ◽  
Definition Study

scholarly journals Problem Definition Study: Lead Beta-Resorcylate

1979 ◽  
Author(s):  
R. S. Wentsel ◽  
III Jones ◽  
Fitzpatrick W. E. ◽  
Kitchens W. H. ◽  
J. F.
Keyword(s):  
Problem Definition ◽  
Definition Study

Linking Creativity With Problem Definition

1994 ◽  
Vol 39 (7) ◽  
pp. 765-766
Author(s):  
Stanley S. Gryskiewicz
Keyword(s):  
Problem Definition

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.

Quality of the Building Envelope is the Basis for Creating an Environmentally Friendly Environment of Vital Activity

2019 ◽  
pp. 10-15
Author(s):  
I.L. SHUBIN ◽  
◽  
N.P. UMNYAKOVA ◽  
I.V. MATVEEVA ◽  
K.A. ANDRIANOV ◽  
...  
Keyword(s):  
Environmentally Friendly ◽  
Building Envelope ◽  
Vital Activity

scholarly journals Resource Scarcity and Sustainability—The Shapes Have Shifted but the Stakes Keep Rising

2021 ◽  
Vol 13 (10) ◽  
pp. 5751
Author(s):  
Alan Randall
Keyword(s):  
Environmental Policy ◽  
Renewable Resource ◽  
Resource Scarcity ◽  
Problem Definition ◽  
Planetary Boundaries ◽  
Strong Sustainability ◽  
Management Concepts ◽  
Special Cases ◽  
Sustainability Theory ◽  
Assimilation Capacity

The objective is to provide an interpretive reading of the literature in resource scarcity and sustainability theory from the nineteenth century to the present time, focusing on shifts that have occurred in problem definition, conceptual framing, research tools applied, findings, and their implications. My reading shows, as one would expect, that the discourse has become more technical and the analysis more sophisticated; special cases have been incorporated into the mainstream of theory; and, where relevant, dynamic formulations have largely supplanted static analysis. However, that is barely scratching the surface. Here, I focus on more fundamental shifts. Exhaustible and renewable resource analyses were incorporated into the mainstream theory of financial and capital markets. Parallels between the resources and environmental spheres were discovered: market failure concepts, fundamental to environmental policy, found applications in the resources sector (e.g., fisheries), and renewable resource management concepts and approaches (e.g., waste assimilation capacity) were adopted in environmental policy. To motivate sustainability theory and assessment, there has been a foundational problem shift from restraining human greed to dealing with risk viewed as chance of harm, and a newfound willingness to look beyond stochastic risk to uncertainty, ambiguity, and gross ignorance. Newtonian dynamics, which seeks a stable equilibrium following a shock, gave way to a new dynamics of complexity that valued resilience in the face of shocks, warned of potential for regime shifts, and focused on the possibility of systemic collapse and recovery, perhaps incomplete. New concepts of sustainability (a safe minimum standard of conservation, the precautionary principle, and planetary boundaries) emerged, along with hybrid approaches such as WS-plus which treats weak sustainability (WS) as the default but may impose strong sustainability restrictions on a few essential but threatened resources. The strong sustainability objective has evolved from maintaining baseline flows of resource services to safety defined as minimizing the chance of irreversible collapse. New tools for management and policy (sustainability indicators and downscaled planetary boundaries) have proliferated, and still struggle to keep up with the emerging understanding of complex systems.

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