Abstract
The importance of an extensive and accurate experimental activity has been recalled many times in this book, for example, in connection with the implementation of reliable numerical tools. In this chapter, we will present some experimental results related to ejectors, refrigeration systems containing ejectors, or physical processes which are relevant for ejectors development.
Unfortunately, the huge amount of data routinely collected by the industries that produce ejectors (for a few names, see Chap. 1) are unavailable or confidential and hence cannot be included here. Therefore, we will deal only with experimental data coming from laboratory prototypes built for research purpose. A caveat on these results concerns the size: in most cases prototypes tend to be small. In principle, this should pose a penalty on the measured performance. Even without citing real data from industry, we may at least certify that, invariably, steam ejectors used for industrial use show a clear decreasing trend of specific consumption of motive steam as size increases.
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Notes
- 1.
As stated in Chap. 3, a method that describes a finite number of sections within the ejector should be considered as zero dimensional, while the qualification of one dimensional should be reserved to those methods that describe the flow evolution continuously along the ejector axis.
- 2.
Latest numerical simulations performed with HFO1233zd confirm that the performances are practically the same as those obtained with R245fa, as long as the same pressure conditions are imposed at the ejector inlets and outlets.
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Grazzini, G., Milazzo, A., Mazzelli, F. (2018). Experimental Activity. In: Ejectors for Efficient Refrigeration. Springer, Cham. https://doi.org/10.1007/978-3-319-75244-0_5
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