Thermodynamic analysis of energy storage supported multigeneration system

Abstract

This article investigates the thermodynamic performance of a solar‐powered integrated multigeneration system with thermal storage. It aims at evaluating the effect of thermal storage on the overall performance of a multigeneration system. A solar heliostat field system, thermal energy storage, Rankine power cycle, electrolyzer, and a double effect absorption chiller make up the multigeneration system. Energy and exergy analyses of the system are performed, and the energy and exergy efficiencies are found to be 35.03% and 27.9%, respectively. The solar heliostat and receiver system obtained 3500 kW of heat, the thermal storage system had a thermal efficiency of 87.4% with the capacity to store 2700 kWth energy for 12 hours, the Rankine cycle produced 1068 kW of electricity and the electrolyzer which receives 20% of the net power produced was able to generate 0.0009035 kg/s of hydrogen. The absorption chiller also produced 271.9 kW of cooling. Furthermore, a parametric study was carried out to observe the effect of varying factors like direct normal irradiance (DNI), the mass fraction of the steam bled from the turbine (j), the pressure of the high‐temperature generator (HTG) inlet steam, and a combination of the DNI and the pressure of the HTG inlet steam on the system performance. While an increase in the DNI led to an improved thermal and exergetic efficiency, the addition of storage led to an increase of 27.7% in the utilization factor of the multigeneration system which means that the performance of the system is increased over time.

Modeling and Simulation of Solid Oxide Fuel Cell Integrated with Anaerobic Digester, Thermal Storage Unit and Solar Collector: A Net Zero Emission System

“…The sensible heat is associated with the materials that do not change their phase (solid to liquid or gas), and latent heat is associated with phase-changing materials/substances. The amount of thermal energy stored by any medium can be expressed as follows [47,48].…”

“…Various solid and liquid materials can be used to store sensible heat, as depicted in Figure 2. Among all, water is the cheapest one [48,49]. Based on temperature range, magnesia fire bricks are selected for thermal storage.…”

“…The Simulink model of thermal storage is depicted in Figure 15. The properties of magnesia bricks used in this study are adopted from the reference [48]. 4.5.…”

Assessing the influence of thermal energy storage on the performance of concentrating solar power plant

“…The progressive global trend in CSP generation is shown between 2009 and 2018, while the Indian scenario of CSP generation is shown between 2011 and 2018 as per IRENA 2019 reports. With many new projects under‐ construction and development, it is sure that CSP with thermal energy storage (TES) is a stiff competitor to fossil fuel‐based power generation units 8‐14 …”