This paper presents an advancement in HVAC system analysis, which is predicated on the electrical analogy to fluid systems. An integrated description or a building's HVAC system and rooms is constructed and may be used to support system testing and balancing, system performance analysis, capacity verification testing, and room interactions. Additional system simulation is useful to assess plant modifications and their impact on HVAC performance. This method is applicable to any facility with a large or complex HVAC system configuration.
The assessment of human exposure to airborne contaminant is an important issue in building design. The physiological significance of such exposure and technical means to minimise such risks have long been known in literatures. (1, 2, 3) In recent years, computational works have increasingly been seen used as design assessment tools as an alternative to site measurement and wind tunnel tests.
A client was pleased with the performance of a recent building designed and built with low energy objectives on the "mixed mode" principle. When the time came to build another building he appointed the same design and construction team and challenged them to suggest cost effective improvements to the environmental features of the original building. The team developed a "shopping list" of potential energy use reducing features that included chilled slabs, which could be cooled by both a cooling pond and mechanical refrigeration. Fortuitously the site had sufficient space for a cooling pond.
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