Investigation of Housing and Environmental Parameters for Improved PoultryProduction in Tanzania: Climate Investigations in Model Buildings

摘要

One of the major factors affecting poultry production is the thermal environmentto which the birds are exposed. Thermal environment refers to the total effect of air temperature, radiation, convection and relative humidity. In tropical regions extreme heat loads can occur in buildings due to high ambient temperatures in combination with solar radiation heat transmitted through the building envelope. Methods to reduce these heat loads are mainly increased ventilation, improved insulation, reflecting building surfaces and building materials with high heat storing capacities. For temperate regions, design guidelines for the summer ventilation requirements in animal houses have been developed. However, these guidelines do not consider the high heat loads which can occur due to solar radiation in poorly insulated houses. The lack of guidelines for tropical regions have made it important to investigate different ways to reduce the heat load due to high solar radiation intensities in poultry houses. The thesis develops design guidelines for ventilation, insulation and building design in order to create a suitable climate in poultry houses in tropical regions.