THERMAL EFFECTS OF VINES ON WALL TEMPERATURES- COMPARING LABORATORY AND FIELD COLLECTED DATA

摘要

This paper summarizes some recent results from an ongoing series of experiments on the effects of vegetation on building surface temperatures and microclimate. For several years we have conducted experiments on the thermal effects of vines on wall surfaces at the energy laboratory of the UCLA Department of Architecture and Urban Design. Our experimental setup, which consists of a series of vertical aluminum plates in both south and west facing orientations with a variety vines growing in front of them, allows us to simultaneously measure differences based on surface color, vine type, vine thickness and orientation. This work, reported on in previous papers (ASES 2000, TIA 2000) showed that vines grown against test panels at a thickness of 12-14 in (30-35 cm) reduced surface temperatures to, or just below, the level of the dry bulb temperature. The aluminum panels of the test modules are inexpensive, easy to handle and set up, but are not a common or typical building surface material. In this paper we will compare data from our test modules to data collected for vines growing against walls of stucco and brick and in configurations that were difficult to duplicate with the test modules. One test is being done at the UCLA energy lab itself. We have placed vines in front of a south facing brick wall that is part of the Architecture building. Surface temperature is measured in several places in the shade of the vine and on the exposed brick surface. We have also placed thermocouples in holes drilled to the center point and the inside edge of the brick surface in order to track heat transfer through the material. Another test is being done on a west facing stucco wall with a vine covering that is from 8 - 16 inches thick. In this test thermocouples were placed on the stucco surface in both sun exposed and vine shaded areas. At the same location we have conducted a test of the thermal conditions around a west-facing pergola covered with a Wisteria vine.