Urban design guidelines to mitigate urban heat island (UHI) effects in hot-dry cities

Global warming and undeniable climatic change in the world have led to decreasing thermal comfort for humans. Urban heat island (UHI) is the most documented phenomenon which has led to the increasing temperature in urban areas. It has received much focus in the past few decades to evaluate the main effective criteria of UHI. Street heat has negative effects on human health and will only worsen in future; these negative effects would double in hot and dry urban area. This paper investigates the effects of UHI in these cities and illustrates the important factors which make them extremely hot. The outcome of this study can be used to determine the key guidelines for urban designers, urban planners, architects and landscape designers to recline the UHI impressions in urban areas and make more thermal comfort for Burgher

Feasibility assessment of the implementation of solar and wind energy technologies in the current context of Iran-case study: Kerman

One of the most important issues in various energy issues is to decrease fossil fuel energy usage and promote renewable energies in developing countries. Iran as a developing country began exploiting renewable resources from the early 1990s. This paper investigates the financial viability of renewable energy technologies in Kerman, which is located in the hot and dry parts of Iran and has a high potential of solar and wind energy. First the potential for solar and wind energy sources are studied and afterwards through two quantitative methods, the cost of this implementation is compared to the benefits gained. The results prove that without a massive financial support by the government, renewable energies would not be economically feasible to be implemented into private household

Climatic Design Principles of Underground Spaces Using CFD Simulation

Iranians used wind catchers to achieve harmony between a structure and the environment and guarantee the environmental comfort of the indoor areas. Wind catchers were the symbols of Persian architecture and with introduction of modern technologies, these traditional elements became obsolete. Rapid population and traffic lead to use underground spaces in cities. This paper proves the ability of wind-catchers to provide natural ventilation in underground spaces based on climatic parameters. Simulation was conducted in complete computational fluid dynamics package to simulate wind in underground space. Results demonstrate that in specific climate condition, wind-catchers could provide natural ventilation for underground space