2.Throttling devices Examples: Flow restricting devices that cause a pressure drop without a work output ·Used to (a)An adjustable valve control flow (e.g.faucet) provide temperature drop (refrigeration,air conditioning) measure flow rates (b)A porous plug (c)A capillary tbe An orifice is also a common throttling device 上游充通大学 April 3,2019 10 SHANGHAI JLAO TONG UNIVERSITYApril 3, 2019 10 2. Throttling devices Examples: An orifice is also a common throttling device • Flow restricting devices that cause a pressure drop without a work output • Used to – control flow (e.g. faucet) – provide temperature drop (refrigeration, air conditioning) – measure flow rates