Effects of Temperature Differences in Optimization of Spiral Plate Heat Exchangers
- PDF / 4,033,173 Bytes
- 18 Pages / 595.276 x 790.866 pts Page_size
- 100 Downloads / 178 Views
ORIGINAL RESEARCH PAPER
Effects of Temperature Differences in Optimization of Spiral Plate Heat Exchangers A. H. Sabouri Shirazi 1 & M. R. Jafari Nasr 2 & M. Ghodrat 3 Received: 2 April 2020 / Revised: 20 June 2020 / Accepted: 14 July 2020 # Springer Nature Singapore Pte Ltd. 2020
Abstract In this research, three aspects of modeling, analyzing, and optimizing spiral plate heat exchangers (SPHEs) are studied. The main objective of this work is to pave the way for comparing manufacturers’ designed SPHEs with theoretical designed SPHEs without involving designers in using computational methods. To begin, with assumption of constant overall heat transfer coefficient and specific heat capacities, a mathematical modeling of SPHE based on energy balance equations is developed to model the SPHE as a network of series-connected equivalent internal heat exchangers to determine the temperature distribution in spiral turns. This modeling can facilitate the usage of temperature-enthalpy diagram in SPHEs’ analysis and design. Furthermore, a new algorithm for thermal design optimization of SPHEs has been proposed. The proposed algorithm is based on maximizing pressure drops at channels, considering geometric proportion of SPHE and minimizing the total cost simultaneously. To show the proposed method applicability in analyzing thermal and hydraulic design parameters, a single-phase counter-current SPHE is assessed and optimized for different design cases with temperature approach variations. Results of comparing manufacturers’/ standard designed SPHEs and research/theoretical designed SPHEs by defining appropriate geometric proportion ranges confirmed that temperature approach variations can improve SPHE performance to a higher extent, such as finding temperature approach ranges for optimized SPHEs with higher compactness to reduce the manufacturing cost. This fact is revealed by introducing compactness-temperature approach diagram which depicts the geometric optimization of SPHEs and the effects of temperature differences in SPHE’s optimization. Keywords Spiral plate heat exchanger . Thermal design optimization . Heat exchangers network . Compactness-temperature approach diagram . Geometric proportion . Cost estimation
Introduction Heat exchangers are pieces of equipment used widely for effective heat transfer between two or more fluids (liquid or gas) in various industries such as power plants and process plants. Among the various forms of heat exchangers, compact heat exchangers have been at the centerpiece of recent research by virtue of having high performance (Energy Efficiency Office 2000). As a compact heat exchanger, spiral plate heat * M. Ghodrat [email protected] 1
Mechanical Department, Petrochemical Industries Design and Engineering Company (PIDEC), Shiraz, Iran
2
Research Institute of Petroleum Industry (RIPI), Tehran, Iran
3
School of Engineering and Information Technology, UNSW Canberra, Canberra, ACT 2612, Australia
exchanger (SPHE) has special features to extend its applications in industry since Ros
Data Loading...
