Research on Amending the Energy Efficiency Provisions in the Building

2014 ◽  
Vol 568-570 ◽  
pp. 1991-1994
Author(s):  
Hai Hong Cui
Keyword(s):  
Energy Performance ◽  
Hot Water ◽  
Building Regulations ◽  
Thermal Transmittance ◽  
Energy Performance Of Buildings ◽  
Air Tightness ◽  
Thermal Bridging ◽  
Technical Basis ◽  
Fuel Costs

The purpose of this paper is to identify the main requirements of the Building Regulations Part L1A for new dwellings. An explanation of the technical basis for energy rating is given including how they are calculated, how fuel costs are used, the role of the standard occupancy pattern, and an appreciation of the Building Research Establishment Domestic Energy Model (BREDEM). The aims and requirements of the European Directive on the Energy performance of Buildings and its implementation for new and existing domestic buildings is also considered. Design/methodology/approach – The requirements of Part L1A of the Building Regulations are developed. These relate to the thermal properties of the building fabric including insulation, thermal bridging, air tightness and glazing, the efficiency and responsiveness of heating and hot water systems, ventilation and lighting. The methodology for calculating thermal transmittance coefficients (U-values) is also demonstrated.

Determination of Linear Thermal Transmittance for Curved Detail

2014 ◽  
Vol 899 ◽  
pp. 112-115
Author(s):  
František Vlach ◽  
Petr Jelínek
Keyword(s):  
Energy Saving ◽  
Volume Ratio ◽  
Energy Performance ◽  
Engineering Practice ◽  
Standard Methods ◽  
Thermal Transmittance ◽  
Energy Performance Of Buildings ◽  
Standard Problem ◽  
Current Energy

This paper deals with the determination of linear thermal transmittance for buildings with rounded shapes. Calculation of linear thermal transmittance is a standard problem in determining the influence of thermal bridges on the overall energy performance of buildings. Computational methods are known for ordinary rectangular buildings. Current energy-saving architecture designs buildings with rounded organic shapes quite frequently. Not only it corresponds with new trends in architecture, but also serves to improve the area to volume ratio of buildings. In such cases the value of linear thermal transmittance calculated by standard methods isn't accurate enough. This paper presents an analysis of the influence of the curvature of the buildings surface to linear thermal transmittance. It provides information applicable for buildings assessment in engineering practice.

The role of air tightness in assessment of building energy performance: Case study of Lithuania

2016 ◽  
Vol 32 ◽  
pp. 31-39 ◽  
Author(s):  
J. Šadauskienė ◽  
L. Šeduikytė ◽  
V. Paukštys ◽  
K. Banionis ◽  
A. Gailius
Keyword(s):  
Building Energy ◽  
Energy Performance ◽  
Building Energy Performance ◽  
Air Tightness

Determination of Linear Thermal Transmittance for Corners with Acute Angle

2014 ◽  
Vol 1041 ◽  
pp. 113-116
Author(s):  
František Vlach
Keyword(s):  
Computational Methods ◽  
Energy Performance ◽  
Acute Angle ◽  
Engineering Practice ◽  
Thermal Transmittance ◽  
Energy Performance Of Buildings ◽  
Standard Problem ◽  
Thermal Bridges

This paper deals with the determination of linear thermal transmittance for buildings with acute angle shapes. Calculation of linear thermal transmittance is a standard problem in determining the influence of thermal bridges on the overall energy performance of buildings. Computational methods are known for ordinary rectangular buildings and the values of typical detail are listed in databases. Current architecture of designs buildings uses acute angle shapes quite frequently. It corresponds with new trends in architecture. In such cases the value of linear thermal transmittance is not accurate for using databases. This paper presents an analysis of the influence of the change of angle of the walls in corner to linear thermal transmittance. It provides information applicable for buildings assessment in engineering practice.

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