Recent developments in enhancing heat transfer in cooling towers, together with the success of chilled ceilings, have prompted a review of the evaporative cooling technique. in temperate maritime climates. The thermal efficiency of such systems is a key parameter, as a measure of the degree to which the system has succeeded in exploiting the cooling potential of the ambient air. This paper presents the results of experimental research into the thermal efficiency of a water-side open indirect evaporative cooling test rig designed to achieve low (1-4 K) approach conditions.
This paper describes a study, developed in the district of Petropolis in the city of Natal, Brazil. The aim of the study was to investigate the influences of city urban form in the climate and its correlation with the thermal sensation of the users of open spaces. The method consists of drawing maps of the study area (based on Katzschner, 1997) including topography, building height, land use, green areas, soil pavement, as well as measurement of the environmental variables: air temperature, relative humidity, direction and wind speed, for a comparative study.
This research work presents the experimental results of the thermal performance of the envelope of a prototype low cost house built in a new sustainable community located in a prevailing temperate climate, with extreme diurnal and seasonal temperature swings. This project is based on the application of an ecological and innovative building system, aimed at reducing construction costs whilst providing suitable indoor thermal comfort for the occupants, as well as high levels of self-sufficiency in energy and water, among other benefits.
This paper describes an experimental study about thermal performance of different glazing materials in prototypes. In Brazil, due to its low latitudes and predominantly hot and humid climate, high solar radiation provokes strong heat gain in almost all the regions of the country. The worst building exposure conditions are on north and west faades. In previous work, the transmissivity to solar radiation for the more frequently used window glasses in buildings in Brazil was obtained through spectrophotometric analyses.
Cultivation of crops such as tomatoes or lettuce in a modern hydroponic growing system reduces water consumption, requires no soil, doubles the growth rate, and enables year-round production. The product is healthier than field agriculture, because pesticide use is often unnecessary, and contamination from soil or airborne pathogens is nearly eliminated. On Mediterranean islands, high import costs, poor soils, and limited water supplies further favor hydroponic vegetable production. Effective hydroponic cultivation requires intensive regulation of the greenhouse environment.
influenced by various factors, such as the type of use (offices, residences, etc.), shape, placement, building materials, meteorological conditions etc. In this work, the heating demands of spaces, which are located in central and surrounding areas of the city of Patras, are examined. For this purpose, a set of 10 data loggers, have been placed, in chosen characteristic locations, to monitor ambient air temperature variations. The collected data serve to calculate the heating degree hours and results are obtained and presented.
The Sino-Italy Environment & Energy Building (SIEEB) is regarded as a platform to develop the bilateral long-term cooperation between Italy and China in the environment and energy fields, and a model case for showing the CO2 emission reduction potential in the building sector in China. In the present study, by means of computer simulations, the interaction between natural and artificial light and the related illumination conditions expected in the SIEEB offices have been analysed.
Sustainable and ecological are becoming fashionable words for advertising products: ecological car, ecological food, ecological bag, even ecological fuel. To claim that a product is sustainable or ecological helps to sell it. This trend applies also to buildings, and sustainable architecture and sustainable design is becoming a fashionable wording. Sustainable architecture has been, for decades, a small cultural niche ignored, sometimes ridiculed, by the official architectural culture, with very few exceptions.
Decisions in the first stage of the design process have to respond to often discordant requirements of quantitative reliability and operational effectiveness and have to be pursued with a systemic, environmental approach. One of the most typical cases in which the necessities of balance between distinct objectives and adoption of a systemic vision become more evident is that of the rehabilitation of building envelopes, which requires a complex kind of evaluation between costs and benefits.
This paper focuses on the effect of water sprinkling on the fluctuation of the surface temperatures of materials, which are widely used in the urban open spaces of Greek cities, and are exposed to solar radiation. The assessment is based on experimental measurements, which were conducted during the summer period of 2004 on samples of building materials. The materials were placed on a flat roof and were periodically sprinkled with water.
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