Configuring wall layers for improved insulation performance

摘要: Abstract External walls provide an important barrier between occupied building spaces and variable ambient conditions. Building insulation is often optimized for static performance based on its R -Value rating, but a growing body of literature has begun to assess the dynamic thermal multi-layer walls. The focus this work fundamental insight into configuring wall layers improved insulating performance. Thirty-three different are evaluated four primary configurations with fixed volumes mass. Only layer distribution varied. Because total volume each material fixed, overall resistance capacitance equivalent all studied. An electrical analogy used model one dimensional heat conduction through determine magnitude ratio phase frequency response at corresponding period 1 day. two temperatures quantify system transfer function inside outside surfaces (i.e., exposed indoor outdoor environments, respectively). best achieved when positioned as close possible near environments). In addition, optimal results occur both mass distributed evenly throughout wall. Using configuration, then divided increasing number thinner layers. Results indicate that optimum exist such maximized.