This is a repository copy of A review on recent developments of thermoelectric materials for room-temperature applications.

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For centuries, dome roofs were used in traditional houses in hot regions such as the Middle East and Mediterranean basin due to its thermal advantages, structural benefits and availability of construction materials. This article presents the computational modelling of the wind-and buoyancy-induced ventilation in a geodesic dome building in a hot climate. The airflow and temperature distributions and ventilation flow rates were predicted using Computational Fluid Dynamics (CFD). The three-dimensional Reynolds-Averaged Navier-Stokes (RANS) equations were solved using the CFD tool ANSYS FLUENT15. The standard k-epsilon was used as turbulence model. The modelling was verified using grid sensitivity and flux balance analysis. In order to validate the modelling method used in the current study, additional simulation of a similar domed-roof building was conducted for comparison. For wind-induced ventilation, the dome building was modelled with upper roof vents. For buoyancy-induced ventilation, the geometry was modelled with roof vents and also with two windows open in the lower level. The results showed that using the upper roof openings as a natural ventilation strategy during winter periods is advantageous and could reduce the indoor temperature and also introduce fresh air. The results also revealed that natural ventilation using roof vents cannot satisfy thermal requirements during hot summer periods and complementary cooling solutions should be considered. The analysis showed that buoyancy-induced ventilation model can still generate air movement inside the building during periods with no or very low wind.

To mitigate climate change attributed to the built environments, there have been tremendous efforts to improve air conditioning systems in the buildings. The possibility of harvesting body heat as a renewable energy source to power a wearable personal heating system is investigated. The aim of this study is to integrate a wearable personal heating system with a thermoelectric generator (TEG) that harvests the body heat which is used to convert it into electricity. Moreover, the interaction between the TEG configuration and power output is studied. The power generation of TEG system is obtained by COMSOL Multiphysics software. The simulation results concluded that all the four proposed heat sink configurations can improve the power output of the wearable TEG at 1.4 m/s and 3m/s compared to that of the reference model. Furthermore, the perforated and trapezium shapes of heat sinks have a significantly better performance in comparison to conventional heat sinks.

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This is a repository copy of Optimization of a wearable thermoelectric generator encapsulated in polydimethylsiloxane (PDMS) : a numerical modelling.

This chapter aims to design, construct and test a new and renewable heating system for fulfilling the energy demand and ameliorating the interior environment of poultry farming in the UK. This system consists of a photovoltaic/thermal module attached to the polyethylene heat exchanger integrated with a geothermal copper pipe array and heat pump. The thermal and electrical energy performance of the hybrid renewable heating system is investigated based on a numerical model and experimental test. Moreover, the economic analysis (and environmental assessment are conducted. It is concluded that the electrical energy production from the photovoltaic array could reach 11867 kWh per annum whereas the heat pump thermal output is about 30210 kWh per annum. Meanwhile, the overall gas and electrical cost of the hybrid renewable heating system are £320 and £129, which are much less than that of the gas burners system and could save £763 and £750, respectively, resulting in less than 6-year of payback period. The energy consumption of the hybrid renewable heating system could decrease about 28873 kWh, resulting in a reduction in total CO2 emission of approximately 8.3 tons, in comparison with the gas burners system.

Energy-conscious design as a concept can become devalued if natural lighting is not convincing. In fact, day lighting can address both quantitative (provision of task luminance, savings in artificial lighting, passive heat gain) and qualitative (indication of spaces' mood, time/duration of exposure, metabolic rhythms) factors of a sustainable design. This paper evaluates the performance characteristics of applied strategies to meet the quantitative responsibilities of natural lighting in the Law court of Antwerp, constructed with environmentally friendly approach. On the basis of observations and archival documents, the results show that the applied strategies e.g. window, atrium and roof light for enhancement of day light penetration and distribution, besides usage of shading devices e.g. brise soleil and overhangs for protecting the spaces from intense sunlight have both advantages and disadvantages. Further, the potentials to relieve the deficiencies are discussed.