Abstract

The growing displacement crisis leaves many housed in simple shelters, which are bespoke to each setting, often sited in harsh climates and normally unconditioned. Measurements have shown that the thermal environment within the shelters can be life-threatening. Hence aid agencies are interested in improving these conditions. Unfortunately, given the skill set within agencies, there is little possibility to use complex thermal modelling to predict the impact of different materials or constructions. Hence the need to provide simple methods. In this work, we introduce a new physics-based thermal model (ShelTherm) for simple structures and encapsulate it within a tool designed to be used by humanitarian staff. Unlike other reduced models, the method is capable of dealing with high ventilation/infiltration rates, thin materials (such as tarpaulin) and high U-values. The model was validated over a wide variety of architectures, materials and climates. Mean error against observed data from a variety of real shelters was +0.94 °C (s.d. 0.79 °C), comparing favourably against the well-known reduced model CIBSE Admittance method (+4.95 °C, s.d. 0.89 °C) and the industry standard Energy+ (+0.60 °C, s.d. 0.32 °C). ISO 13792:2012(E) classified it as a Class 1 model, the highest possible. The differences between the new method and Energy+ across block, tarpaulin and stone shelters in Ethiopia, Bangladesh and Nepal were always less than 1.3 °C, and +0.24 °C for shelters in a mild climate. Humanitarian workers classed the tool as “easy” or “very easy” to use. The typical time to model a shelter by a first-time user was 34 minutes. ShelTherm can hence be seen as highly fit-for-purpose due to its overall accuracy and ease of use.

Original languageEnglish
Article number102579
Number of pages21
JournalJournal of Building Engineering
Volume44
Early online date6 May 2021
DOIs
Publication statusPublished - 10 Jun 2021

Bibliographical note

Funding Information:
This work was supported by the Engineering and Physical Science Research Council (EPSRC) under grant EP/P510907/1 . Thanks to Shelterbox, Mott MacDonald, NRC Djibouti and UNHCR (Ethiopia, Yemen & Afghanistan) for participating in the surveys.

Funding Information:
This work was supported by the Engineering and Physical Science Research Council (EPSRC) under grant EP/P510907/1. Thanks to Shelterbox, Mott MacDonald, NRC Djibouti and UNHCR (Ethiopia, Yemen & Afghanistan) for participating in the surveys.

Publisher Copyright:
© 2021 The Author(s)

Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.

Keywords

  • Refugee shelters
  • ShelTherm
  • Thermal comfort

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Architecture
  • Building and Construction
  • Safety, Risk, Reliability and Quality
  • Mechanics of Materials

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