Application Algorithm Development of Pinch Technology in Heat Integration Problem

Abstract

Pinch technology is developing and its application is widening, reaching new horizons. The original concepts of pinch approach were quite clear and, because of numerous ways, application engineer gets confused among these numerous flexibilities. Therefore, there is a need for a rigorous and robust model which could guide the optimisation engineer on deciding the applicability of the pinch approach and direct sequential step of procedure in predefined workflow, so that the precision of approach is ensured. Exploring the various options of a novice handson algorithm development that can be coded and interfaced with GUI and keeping in mind the difficulties faced by designers, an effort was made to formulate a new algorithm for the optimisation activity. As such, the work aims at easing out application hurdles and providing hands-on information to the developer for use during preparation of new application tools. This paper presents a new algorithm, the application which ensures the designer does not violate basic pinch rules. To achieve this, intermittent check gates are provided in the algorithm, which eliminate violation of predefined basic pinch rules, design philosophy, and Engineering Standards and ensure that constraints are adequately considered. On the other side, its sequential instruction to develop the pinch analysis and reiteration promises maximum energy recovery (MER).

Rate and equilibrium based modeling with the sequential quadratic programming optimization method for glycol dehydration of produced natural gas

“…The pinch point is a temperature, and the technology creates plant temperature intervals. The heating utility can be used only above the pinch and the cooling utility only below it (Sojitra 2016). The heat exchanger cannot be used across the pinch point, because all heat flows must be increased with this heat transferred (Mamudu et al 2019).…”

Process Integration of Sulfuric Acid Plant Based on Contact Process

“…Since the usage of feed water doesn't contribute directly with the reaction, process integration alternatives are designed through reanalyzing new pinch point and reconstruction of new heat exchanger networks (Djaeni et al, 2010 andSojitra, 2016). The objective is achieved by following the steps for pinch analysis:…”

“…To calculate the annual capital cost, it is necessary to first calculate the heat transfer area used for each design. Heat transfer area is calculated by the equation (2) (Sojitra, 2016) and total heat transfer area calculated is shown in Table 4. Using equation (3) (Xiao & Cui, 2017), the estimated annual costs of the heat exchangers (ACHE) needed can be calculated.…”

“…Operational costs are calculated based on the need for heating and cooling utilities. Annual operational costs can be calculated using equation 5 (Sojitra, 2016). Where heating and cooling utility costs are $250/kW/year and $25/kW/year, respectively (Xiao & Cui, 2017).…”