Laboratory safety and energy savings are currently occupying the same space in many engineering conversations regarding lab design and construction. Exhaust from lab hoods is particularly prominent in such conversations. There are a wide variety of strategies that can be applied to save energy by reducing hood exhaust, from the inexpensive approach of lowering face velocities to the more expensive variable air volume (VAV) lab hood exhaust systems. Whatever energy-saving strategy is chosen, it should maintain good hood containment. Once this central truth is accepted, energy savings with established containment becomes straightforward to measure. Overall energy-savings techniques can be subdivided into separate components and analyzed for effectiveness. Low-exhaust technologies are not additively cumulative, but multiplicative in nature. Each strategy can reduce total energy use by a percent of the whole; the next strategy has a lower “whole” from which to produce savings and so forth. Since each savings strategy has an up-front cost, it only makes sense to use the least expensive strategies first, followed by the costlier strategies. Using this approach, smaller lab hoods, lower face velocities, lower operating sash openings, and nonoccupied hood exhaust setbacks produced much more significant and less expensive savings than more expensive approaches like heat reclamation and VAV. Of course, like any generalized strategy, there are some important qualifications that may shift more expensive strategies to a higher priority.

中文翻译：

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实验室通风柜节能：低挂果

当前，在有关实验室设计和建造的许多工程对话中，实验室安全和节能都占据了相同的空间。在这种对话中，实验室排风罩的排气尤为突出。从降低面罩速度的廉价方法到更昂贵的可变风量（VAV）实验室罩罩排气系统，可以采用多种策略来减少罩罩排气以节省能源。无论选择哪种节能策略，都应保持良好的通风柜围护。一旦接受了这一核心真理，就可以通过建立围堵措施来节省能源变得很容易衡量。总体节能技术可细分为不同的组件，并进行有效性分析。低排放技术不是累加累积的，而是可乘性的。每种策略都可以减少总能耗的百分之一；下一策略具有较低的“整体”，可以从中产生节省等。由于每种储蓄策略都有前期成本，因此只有先使用最便宜的策略，然后再使用成本更高的策略才有意义。使用这种方法，较小的实验室通风橱，较低的工作面速度，较低的操作窗扇开口以及无人使用的通风橱排风挫折，比诸如热回收和VAV等更昂贵的方法产生了更为显着且更便宜的节省。当然，像任何广义策略一样，