Evaporators and suitably configured direct-contact condensers were developed and patented by SERI (see ). Externally equalized valves must be used on multi-circuited evaporators with refrigerant distributors. Modern industries use multiple-effect evaporators for evaporating water. Besides it also provides fabrication for tank farms, evaporators and brine heaters. It is used to remove and discourage the buildup of limescale from boilers and evaporators. One-neck round-bottom flasks are used as the distilling flasks in rotary evaporators. They are often found in rotary evaporators. Putting together evaporators saves heat and thus requires less energy. There are three steam evaporators on Kwaj. For the climbing film evaporators, the feed is introduced at the bottom of the tubes. These evaporators could work inefficiently because of a loss of circulation. The extracted brown liquor is concentrated, in multiple effect evaporators. During the deployment, a severe water shortage occurred due to evaporators breaking down. There are several problems related to climbing and falling film plate evaporators. Climbing and falling-film plate evaporators have a relatively large surface area.