Composite Insulated Precast Concrete Panel Thermal Bridging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing precast concrete wall panels suffer from poor energy efficiency due to high thermal mass, which leads to increased energy consumption for heating and cooling, and traditional insulation methods are inefficient and cumbersome, often requiring thick interior frames that occupy valuable space and create thermal bridging issues.
Innovation Solution
A composite insulated precast concrete panel system is developed, featuring a foam insulating panel with a structural cementitious-based interior layer and a non-structural exterior layer, incorporating radiant heat reflective materials and a mesh/lath system for secure attachment, allowing for efficient insulation and reduced thermal mass exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional concrete wall panels are used, then structural strength and durability are improved, but energy efficiency deteriorates due to high thermal mass
Solution Approach 1:
The wall panel is segmented into three distinct layers: an exterior concrete layer for structural strength, a middle foam insulation layer for thermal efficiency, and an interior cementitious layer for finish and additional insulation. This segmentation allows each layer to perform its specific function optimally, resolving the contradiction between structural strength and energy efficiency.
Solution Approach 2:
The wall panel uses composite construction combining concrete, foam insulation material, and cementitious-based material in a single integrated panel. This composite structure merges the high strength of concrete with the high insulation value of foam, achieving both structural integrity and energy efficiency simultaneously.
2Loss of energy
If thick insulation is added to improve energy efficiency, then heat transfer is reduced, but panel weight and complexity increase
Solution Approach 1:
Insulation is applied locally at the exterior concrete interface where thermal bridging occurs most, rather than requiring uniform thick insulation throughout. The foam insulation material is positioned strategically to maximize thermal break effectiveness while minimizing overall panel thickness and weight.
Solution Approach 2:
The invention changes the thermal parameters of the wall assembly by introducing foam insulation with high R-value per inch, allowing achieving desired insulation levels with thinner sections compared to traditional materials, thereby reducing panel weight and complexity.
3Loss of energy
If interior framing is used to add insulation, then energy efficiency is improved, but valuable interior space is occupied and thermal bridging occurs
Solution Approach 1:
Instead of placing insulation on the interior side of the wall as in traditional construction, the invention places continuous insulation on the exterior side, integrated into the precast panel itself. This inverts the conventional insulation placement, eliminating interior space occupation and preventing thermal bridging at framing locations.
Solution Approach 2:
The insulation layer is merged with the structural precast panel into a single integrated composite unit. The foam insulation is embedded within the precast concrete panel construction, combining structural support and thermal insulation functions in one element, eliminating the need for separate interior framing and insulation systems.
4Weight of stationary object
If precast concrete panels are made thinner to reduce weight, then ease of installation is improved, but structural strength and insulation performance deteriorate
Solution Approach 1:
The precast panel uses composite construction with concrete providing structural strength, foam providing insulation, and cementitious material providing additional structural and finish functions. This composite approach allows thinner overall panel thickness while maintaining both structural strength and insulation performance through optimized material distribution.
Solution Approach 2:
The invention changes the material parameters by using high-strength concrete and high R-value foam insulation, allowing reduction in panel thickness and weight while maintaining required structural and thermal performance through superior material properties.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This system significantly enhances energy efficiency by minimizing heat transfer, reducing the need for thick insulation, and allowing for quicker construction and lighter, stronger panels with integrated architectural finishes, thus addressing the limitations of traditional precast concrete panels.
Implementation Method 1
a foam insulating panel (16) having an interior primary surface (18) and an exterior primary surface (20)
Implementation Method 2
incorporating radiant heat reflective materials
Implementation Method 3
A first structural layer of cementitious-based material (1112) is formed on the first surface of the foam insulating panel (16) and affixed thereto
Data Source
AI summary
The invention comprises a relatively lightweight cementitious-based material panel. The cementitious-based material panel comprises a foam insulating panel having a first surface and a second surface; a first structural layer of cementitious-based material formed on the first surface of the foam insulating panel and affixed thereto; and a second non-structural layer of cementitious-based material formed on the second surface of the foam insulating panel and affixed thereto. The second non-structural layer of cementitious-based material is substantially thinner than the first structural layer of concrete. The second non-structural layer of cementitious-based material is preferably formed from polymer modified concrete, plaster or mortar. A method of making the cementitious-based material panel is also disclosed.