Next Article in Journal
A Case Study of Surface Borehole Wall Dislocation Induced by Top-Coal Longwall Mining
Previous Article in Journal
Lithium-Ion Battery Storage for the Grid—A Review of Stationary Battery Storage System Design Tailored for Applications in Modern Power Grids
Article Menu
Issue 12 (December) cover image

Export Article

Open AccessArticle
Energies 2017, 10(12), 2108; doi:10.3390/en10122108

Development of Numerical Heat Transfer and the Structural Model to Design Slim and Translucent Vacuum Layer Type Insulation Panels to Retrofitting Insulation in Existing Buildings

Division of Human Environmental Systems, Graduate School of Engineering, Hokkaido University, N13-W8, Kita-ku, Sapporo 060-8628, Japan
*
Author to whom correspondence should be addressed.
Received: 3 November 2017 / Revised: 6 December 2017 / Accepted: 8 December 2017 / Published: 11 December 2017
View Full-Text   |   Download PDF [7552 KB, uploaded 12 December 2017]   |  

Abstract

The authors develop slim and light-weight vacuum insulation panels (VIPs) by producing vacuum layers with spacers and plastic plates. The developed VIPs have the advantages of a low cost and easy installation, thus facilitating retrofitting insulation of existing buildings. In addition, one of the developed VIPs is slim and translucent so it can be easily used for windows in an internal installation. In this paper, the authors first propose a vacuum layer type slim translucent VIP and focus on a reasonable design method. Next, the authors introduce the design process in which the structural design is obtained with element mechanical analysis and a three-dimensional analysis is conducted for the VIP element. In the study, a heat transfer model is used to predict the insulation performance through finite element analysis (FEA). Subsequently, the authors perform an experiment to measure the thermal conductivity in a guarded hot plate apparatus to validate the performance prediction. Finally, case studies are performed to confirm how the different design conditions affect the insulation performance. The optimum design of the vacuum layer type slim and translucent VIP will have a sufficient structural strength to hold and maintain the vacuum layer. The thermal conductivity is approximately 0.007 W / ( m · K ) , which can effectively improve the insulation performance in applications. View Full-Text
Keywords: vacuum insulation panels; vacuum layer type; slim and translucent retrofit insulation; structural model; heat transfer model; finite element analysis; guarded hot plate apparatus vacuum insulation panels; vacuum layer type; slim and translucent retrofit insulation; structural model; heat transfer model; finite element analysis; guarded hot plate apparatus
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

Yang, Z.; Katsura, T.; Aihara, M.; Nakamura, M.; Nagano, K. Development of Numerical Heat Transfer and the Structural Model to Design Slim and Translucent Vacuum Layer Type Insulation Panels to Retrofitting Insulation in Existing Buildings. Energies 2017, 10, 2108.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Energies EISSN 1996-1073 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top