scholarly journals Towards harmonizing the NFRC and CEN window performance simulation methods

2019 ◽  
Vol 46 (8) ◽  
pp. 687-703
Author(s):  
Peta-Gaye Ebanks ◽  
Russell Richman
Keyword(s):  
North American ◽  
High Performance ◽  
Simulation Software ◽  
Simulation Methods ◽  
Calculation Methods ◽  
Performance Simulation ◽  
European Committee ◽  
U Value ◽  
Performance Frame ◽  
Influential Parameters

Studies have found that the European Committee for Standardization (CEN) and National Fenestration Rating Council (NFRC) methods produce different U-values for the same window resulting in confusion when comparing products. A comparative evaluation of the NFRC and CEN U-value calculation methods was conducted for North American residential high-performance window products with focus on the most influential parameters in determining the whole window U-value for high-performance windows. Using two-dimensional conduction simulation software, four North American high-performance frame types with double, triple, and quad glazing combinations were simulated and calculated according to the NFRC and CEN standard methods. Overall, the trend showed that for the specific window combinations of this study, the higher the performance of the insulated glazing unit (IGU), the lesser the differences in the whole window U-value of both methods. The results showed an overall difference of 1 to 11% in whole window U-value when using the NFRC and CEN standards, lower than other studies. Generally, the NFRC standard resulted in the lower U-value for each case. Recommendations for harmonization of the two standards include aligning boundary conditions, frame cavity models, and material conductivities.

scholarly journals A comparison of the NFRC and CEN thermal transmittance calculation methods in North America’s eight climate zones.

2021 ◽  
Author(s):  
Peta-Gaye Ebanks
Keyword(s):  
North American ◽  
Comparative Evaluation ◽  
High Performance ◽  
Simulation Software ◽  
Calculation Methods ◽  
Climate Zones ◽  
Standard Methods ◽  
Thermal Transmittance ◽  
U Value ◽  
Performance Frame

Studies have found that the CEN and NFRC methods produce different U-values for the same window. A comparative evaluation of the NFRC and CEN U-value calculation methods was conducted for North American residential high performance window products, as well as several parameters that are most influential in determining the whole window U-value for high performance windows, when utilizing different assumptions and boundary conditions, in North America’s eight climate zones. Using 2-D simulation software, THERM and WINDOW, four North American high performance frame types with double, triple and quad glazing combinations, were simulated and calculated according to the NFRC and CEN standard methods. Overall, the trend showed that for the specific window combinations of this study, the higher the performance of the IGU, the lesser the differences in the whole window U-value of both methods. Several strategies were proposed to support the possibility of the harmonization of both calculation methods.

scholarly journals A comparison of the NFRC and CEN thermal transmittance calculation methods in North America’s eight climate zones.

2021 ◽  
Author(s):  
Peta-Gaye Ebanks
Keyword(s):  
North American ◽  
Comparative Evaluation ◽  
High Performance ◽  
Simulation Software ◽  
Calculation Methods ◽  
Climate Zones ◽  
Standard Methods ◽  
Thermal Transmittance ◽  
U Value ◽  
Performance Frame

Studies have found that the CEN and NFRC methods produce different U-values for the same window. A comparative evaluation of the NFRC and CEN U-value calculation methods was conducted for North American residential high performance window products, as well as several parameters that are most influential in determining the whole window U-value for high performance windows, when utilizing different assumptions and boundary conditions, in North America’s eight climate zones. Using 2-D simulation software, THERM and WINDOW, four North American high performance frame types with double, triple and quad glazing combinations, were simulated and calculated according to the NFRC and CEN standard methods. Overall, the trend showed that for the specific window combinations of this study, the higher the performance of the IGU, the lesser the differences in the whole window U-value of both methods. Several strategies were proposed to support the possibility of the harmonization of both calculation methods.

scholarly journals MPMC and MCMD: Free High‐Performance Simulation Software for Atomistic Systems

2019 ◽  
Vol 2 (11) ◽  
pp. 1900113 ◽  
Author(s):  
Douglas M. Franz ◽  
Jonathan L. Belof ◽  
Keith McLaughlin ◽  
Christian R. Cioce ◽  
Brant Tudor ◽  
...  
Keyword(s):  
High Performance ◽  
Simulation Software ◽  
Performance Simulation ◽  
Atomistic Systems

scholarly journals Numerical Evaluation of a HVAC System Based on a High-Performance Heat Transfer Fluid

Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3298
Author(s):  
Gianpiero Colangelo ◽  
Brenda Raho ◽  
Marco Milanese ◽  
Arturo de Risi
Keyword(s):  
Heat Transfer ◽  
High Performance ◽  
Cooling System ◽  
Electrical Energy ◽  
Simulation Software ◽  
Heat Transfer Fluid ◽  
Hvac System ◽  
Dynamic Simulations ◽  
Heating And Cooling ◽  
The University

Nanofluids have great potential to improve the heat transfer properties of liquids, as demonstrated by recent studies. This paper presents a novel idea of utilizing nanofluid. It analyzes the performance of a HVAC (Heating Ventilation Air Conditioning) system using a high-performance heat transfer fluid (water-glycol nanofluid with nanoparticles of Al2O3), in the university campus of Lecce, Italy. The work describes the dynamic model of the building and its heating and cooling system, realized through the simulation software TRNSYS 17. The use of heat transfer fluid inseminated by nanoparticles in a real HVAC system is an innovative application that is difficult to find in the scientific literature so far. This work focuses on comparing the efficiency of the system working with a traditional water-glycol mixture with the same system that uses Al2O3-nanofluid. The results obtained by means of the dynamic simulations have confirmed what theoretically assumed, indicating the working conditions of the HVAC system that lead to lower operating costs and higher COP and EER, guaranteeing the optimal conditions of thermo-hygrometric comfort inside the building. Finally, the results showed that the use of a nanofluid based on water-glycol mixture and alumina increases the efficiency about 10% and at the same time reduces the electrical energy consumption of the HVAC system.

scholarly journals Solution of Bottlenecks in the Logistics Flow by Applying the Kanban Module in the Tecnomatix Plant Simulation Software

2021 ◽  
Vol 13 (14) ◽  
pp. 7989
Author(s):  
Miriam Pekarcikova ◽  
Peter Trebuna ◽  
Marek Kliment ◽  
Michal Dic
Keyword(s):  
Lean Manufacturing ◽  
Business Processes ◽  
Software Tool ◽  
Transportation Systems ◽  
Simulation Software ◽  
Simulation Methods ◽  
Software Environment ◽  
Production Logistics ◽  
Pull System ◽  
Plant Simulation

The presented article deals with the issue of solving bottlenecks in the logistics flow of a manufacturing company. The Tx Plant Simulation software tool is used to detect bottlenecks and deficiencies in the company’s production, logistics and transportation systems. Together with the use of simulation methods and lean manufacturing tools, losses in business processes are eliminated and consequently flow throughput is improved. In the TX Plant Simulation software environment, using Bottleneck analyzer, bottlenecks were defined on the created simulation model and a method of optimizing logistics flows was designed and tested by introducing the Kanban pull system. This resulted in an improvement and throughput of the entire logistics flow, a reduction in inter-operational stocks and an increase in the efficiency of the production system as a whole.

Based on Numerical Simulation of High-Performance Parallel Machine Muffler Experimental Calibration

2013 ◽  
Vol 718-720 ◽  
pp. 1645-1650
Author(s):  
Gen Yin Cheng ◽  
Sheng Chen Yu ◽  
Zhi Yong Wei ◽  
Shao Jie Chen ◽  
You Cheng
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Boundary Element ◽  
Message Passing ◽  
High Performance ◽  
Message Passing Interface ◽  
Parallel Machine ◽  
Simulation Software ◽  
Experimental Calibration ◽  
The Cost

Commonly used commercial simulation software SYSNOISE and ANSYS is run on a single machine (can not directly run on parallel machine) when use the finite element and boundary element to simulate muffler effect, and it will take more than ten days, sometimes even twenty days to work out an exact solution as the large amount of numerical simulation. Use a high performance parallel machine which was built by 32 commercial computers and transform the finite element and boundary element simulation software into a program that can running under the MPI (message passing interface) parallel environment in order to reduce the cost of numerical simulation. The relevant data worked out from the simulation experiment demonstrate that the result effect of the numerical simulation is well. And the computing speed of the high performance parallel machine is 25 ~ 30 times a microcomputer.

A novel low-complexity and high-performance frame-skipping transcoder in dct domain

2005 ◽  
Vol 51 (4) ◽  
pp. 1306-1312 ◽  
Author(s):  
Chunrong Zhang ◽  
Shibao Zheng ◽  
Chi Yuan ◽  
Feng Wang
Keyword(s):  
High Performance ◽  
Low Complexity ◽  
Dct Domain ◽  
Performance Frame

High-Performance Simulation of High-Beta Plasmas Using PIC Method

2020 ◽  
pp. 207-215
Author(s):  
Igor Chernykh ◽  
Vitaly Vshivkov ◽  
Galina Dudnikova ◽  
Tatyana Liseykina ◽  
Ekaterina Genrikh ◽  
...  
Keyword(s):  
High Performance ◽  
Performance Simulation ◽  
Pic Method ◽  
High Beta
Sign in / Sign up

Export Citation Format

Share Document