Heat integration applied on low thermal energy system: Building complex case study

Abstract

The tertiary-building sector is one of the most important energy consumers in the Morocco, especially thermal energy. Its intensive use of energy is highly related to the building’s inefficient processes. The Moroccan strategy for energy efficiency aims mainly to save 12% of energy consumption by 2020 and 15% by 2030, which reinforce the appearance of many energy saving alternatives ranging from sensitization and construction laws to engineering applications. The present paper addresses the problem of the building complex energy efficiency in order to improve its performance thermally. The proposed approach in this work is based on the pinch technology which is a technique widely used to integrate and optimize the energy of thermal systems and which has demonstrated its successfulness for industrial process. The simulation results reveals that the potential thermal energy saving reaches 21.16%, with heat exchange network design initially proposed to clearly show the potential recovered. Based on the composite curves (CCs), the problem table algorithm (PTA) and the grand composite curve (GCC), the pinch point temperature is turned out to be 15°C with 316,99 kW of hot utility. The obtained results reveal that the proposed pinch technology perform its effectiveness not only in the industrial sector but also in the building-tertiary.

A generic algorithm-based application for pinch-exergy prediction in process industries: A case study

“…The building complex case study results are tabulated in Table 18 for further comparison with those of Khalid et al 59 The previous study was conducted within the framework of application to the building sector. The research was limited to the energy concept, otherwise it was based only on the pinch method.…”

“…Other research on PA and ExA has been conducted to analyse ventilation system integration possibilities 57 and the effect of thermal energy storage integration. 58 The generic algorithm is applied to a case study adopted from Khalid et al 59 Figure 5 shows the building complex thermal system diagram (flowsheet diagram). To meet its thermal demand, the building is equipped with two boilers located in the technical room providing 320 kW using "Fuel", 12 flat-plate solar collectors and new streams identified as hot streams including the condensed boiler smoke and wasted heat from soapy laundry water.…”