skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Enhancing building energy performance by effectively using phase change material and dynamic insulation in walls

Journal Article · · Applied Energy

Deploying phase change materials (PCMs) in building envelopes can be efficacious in reducing space heating/cooling loads and providing load shedding and shifting capacity. However, the full potential of PCM-integrated envelopes can only be harnessed if the PCM undergoes phase change using free ambient heating/cooling, and the stored energy is effectively transferred between the exterior and the interior environments. Traditional thermal insulation (with a fixed thermal resistance) limits PCM utilization, which restrains the energy saving potential of a PCM-integrated envelope to a small percentage. Proposed dynamic insulation material and system (DIMS) provides the option of varying its thermal resistance based on the indoor and outdoor conditions. Although it has been established that employing PCM as well as DIMS in building envelopes separately improves buildings’ energy performance, no prior studies that analyzed the combined influence of both technologies were identified. In this study, we examine a novel wall design, comprising a layer of PCM between two layers of DIMS. We note that the PCM-DIMS-integrated wall provides significantly higher energy saving potential than the DIMS-only integrated wall or the PCM-only integrated wall in all the climates and wall orientations analyzed in this study. Depending on the climate, the PCM-DIMS-integrated wall could provide 15–72% reduction in annual heat gain and 7–38% reduction in annual heat loss. The analysis presented in this study supports the need to develop scalable dynamic insulations combined with thermal energy storage systems for buildings.

Research Organization:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Energy Efficiency Office. Building Technologies Office
Grant/Contract Number:
AC36-08GO28308
OSTI ID:
1735628
Alternate ID(s):
OSTI ID: 1809390
Report Number(s):
NREL/JA-5500-75608; MainId:5993; UUID:17548025-b81a-ea11-9c2a-ac162d87dfe5; MainAdminID:18940
Journal Information:
Applied Energy, Vol. 283; ISSN 0306-2619
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (51)

Dynamic insulation of the building envelope: Numerical modeling under transient conditions and coupling with nocturnal free cooling journal June 2015
Potential energy savings from deployment of Dynamic Insulation Materials for US residential buildings journal March 2017
Low-cost phase change material as an energy storage medium in building envelopes: Experimental and numerical analyses journal December 2014
Optimizing PCM-integrated walls for potential energy savings in U.S. Buildings journal November 2020
Review on thermal energy storage with phase change materials (PCMs) in building applications journal April 2012
A kind of PCMs-based lightweight wallboards: Artificial controlled condition experiments and thermal design method investigation journal October 2018
Advanced low-carbon energy measures based on thermal energy storage in buildings: A review journal February 2018
Peak load shifting control using different cold thermal energy storage facilities in commercial buildings: A review journal July 2013
Numerical evaluation of thermal comfort in rooms with dynamic insulation journal July 2000
Combined experimental and numerical evaluation of a prototype nano-PCM enhanced wallboard journal October 2014
Heat transfer reduction in buildings by embedding phase change material in multi-layer walls: Effects of repositioning, thermophysical properties and thickness of PCM journal September 2019
Switchable thermal insulation: results of computer simulations for optimisation in building applications journal January 2000
Performance assessment of residential building envelopes enhanced with phase change materials journal February 2020
Modeling of facade elements with switchable U-value journal April 2018
The application of dynamic insulation in buildings journal September 1998
An overview of thermal energy storage systems journal February 2018
A parametric study of phase change material characteristics when coupled with thermal insulation for different Australian climatic zones journal October 2019
Conceptual analysis and design of a partitioned multifunctional smart insulation journal February 2014
Energy performance analysis of variable thermal resistance envelopes in residential buildings journal September 2015
Characterisation of thermal diode panels for use in the cooling season in buildings journal March 2002
Modeling phase change materials embedded in building enclosure: A review journal May 2013
Effects of PCM state on its phase change performance and the thermal performance of building walls journal November 2014
Effects of working fluids on the performance of a bi-directional thermodiode for solar energy utilization in buildings journal March 2009
Assessing the integration of a thin phase change material (PCM) layer in a residential building wall for heat transfer reduction and management journal January 2015
Optically-controlled long-term storage and release of thermal energy in phase-change materials journal November 2017
Dynamic thermal performance analysis of fiber insulations containing bio-based phase change materials (PCMs) journal September 2012
External stimulation-controllable heat-storage ceramics journal May 2015
Application of PCM energy storage in combination with night ventilation for space cooling journal November 2015
Closed translucent façade elements with switchable U -value—A novel option for energy management via the facade journal January 2015
Empirical validation and comparison of PCM modeling algorithms commonly used in building energy and hygrothermal software journal April 2020
Experimental investigation on thermal behavior and reduction of energy consumption in a real scale building by using phase change materials on its envelope journal August 2018
Thermal diodes, regulators, and switches: Physical mechanisms and potential applications journal December 2017
Modular breathing panels for energy efficient, healthy building construction journal April 2006
Control strategies for dynamic insulation materials applied to commercial buildings journal November 2017
Effect from a Variable U-Value in Adaptive Building Components with Controlled Internal Air Pressure journal November 2015
Electrochromic dynamic windows for office buildings journal June 2012
Improving building fabric energy efficiency in hot-humid climates using dynamic insulation journal May 2012
Design of a Smart Thermal Insulation System journal August 2009
Simulation study on dynamic heat transfer performance of PCM-filled glass window with different thermophysical parameters of phase change material journal November 2015
Traditional, state-of-the-art and future thermal building insulation materials and solutions – Properties, requirements and possibilities journal October 2011
Thermal characterization of full-scale PCM products and numerical simulations, including hysteresis, to evaluate energy impacts in an envelope application journal June 2018
Phase change material's (PCM) impacts on the energy performance and thermal comfort of buildings in a mild climate journal April 2016
On the importance of the location of PCMs in building walls for enhanced thermal performance journal June 2013
Comparative analysis of the PCM application according to the building type as retrofit system journal March 2019
Modulating thermal load through lightweight residential building walls using thermal energy storage and controlled precooling strategy journal November 2020
A review on macro-encapsulated phase change material for building envelope applications journal October 2018
Phase change materials and products for building applications: A state-of-the-art review and future research opportunities journal May 2015
The path to the high performance thermal building insulation materials and solutions of tomorrow journal July 2010
Potential analysis of a new removable insulation system journal November 2017
A passive–active dynamic insulation system for all climates journal December 2012
Developing a two-criteria framework to rank thermal insulation materials in nearly zero energy buildings using multi-objective optimization approach journal December 2020