A Study of the MSF Desalination Process Utilizing the Controlled Two-Phase Flow Concept. Phase II

摘要

This study presents a design and cost estimate for a pilot plant using the controlled two-phase flow (CTPF) heat transfer concept. Process conceptual design applications and cost estimates are also discussed. The CTPF concept is achieved by introducing a gas into the tubeside of a large condenser bundle, thus inducing a two-phase mixture within the condenser tubes. This concept has been applied specifically to the multistage flash (MSF) distillation process. The objective of the pilot plant is to enable an extensive analysis and performance evaluation of the two-phase flow system under conditions as may be experienced in a CTPF-MSF hybrid plant. The pilot plant is expected to cost $160,000 for capital equipment. The conceptual application studies have indicated that a 14% savings in annual amortized capital and electrical energy cost can be achieved using the CTPF concept in an acid-treated MSF plant corresponding to Universal Design Case No. 6; a 28% savings can be realized using enhanced heat transfer tubes in an acid-treated MSF plant; and a 29% savings can be achieved using the CTPF concept and enhanced heat transfer tubes based on Universal Design Case No. 6.