Abstract
Limited research of heat integration has been conducted in the oleochemical field. This paper attempts to evaluate the performance of an existing heat exchanger network (HEN) of an oleochemical plant at 600 tonnes per day (TPD) in Malaysia, in which the emphases are placed on the annual saving and reduction in energy consumption. Using commercial HEN numerical software, ASPEN Energy Analyzer v10.0, it was found that the performance of the current HEN in place is excellent, saving over 80% in annual costs and reducing energy consumption by 1,882,711 gigajoule per year (GJ/year). Further analysis of the performance of the HEN was performed to identify the potential optimisation of untapped heating/cooling process streams. Two cases, which are the most cost-effective and energy efficient, were proposed with positive results. However, the second case performed better than the first case, at a lower payback time (0.83 year) and higher annual savings (0.20 million USD/year) with the addition of one heat exchanger at a capital cost of USD 134,620. The first case had a higher payback time (4.64 years), a lower annual saving (0.05 million USD/year) and three additional heaters at a capital cost of USD 193,480. This research has provided a new insight into the oleochemical industry in which retrofitting the HEN can further reduce energy consumption, which in return will reduce the overall production cost of oleochemical commodities. This is particularly crucial in making the product more competitive in its pricing in the global market.
Highlights
Being one of the largest exporters of palm oil and its associated products, Malaysia provides approximately 20% of the world’s production of oleochemicals [1]
Case details how functions cases (Cases 2 and 3) are retrofit proposals based on the two goals, which are the most as an effective energy management tool as compared energy-efficient and the most cost-efficient approach.to Case 0
Subsequent cases (Cases 2 and 3) are retrofit proposals based on the two goals, which are the most energy-efficient and the most
Summary
Being one of the largest exporters of palm oil and its associated products, Malaysia provides approximately 20% of the world’s production of oleochemicals [1]. The world energy consumption is projected to rise nearly 50% from 600 to almost 900 quadrillion British thermal units (BTU) between 2018 and 2050 with the industrial sector as the largest consumer, constituting more than half of the share [3]. The industrial sector in Malaysia used 29.5% or 19,046 kilotonnes of oil equivalent (ktoe) of the final energy demand in [4], in which many of the fuels are derived from non-renewable sources. According to some published literature, the fuels that are often involved are non-renewable; they will be inevitably exhausted in 40 years or four centuries, depending on the information source [5]
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