A year-round dynamic simulation of a solar combined, ejector cooling, heating and power generation system. (5th May 2019)

• Record Type: Journal Article
• Authors: Jafari Mosleh, Hassan; Hakkaki-Fard, Ali; DaqiqShirazi, Mohammadreza
• Is Part Of: Applied thermal engineering. Volume 153(2019)
• Page Start: 1
• Page End: 14
• Publication Date: 2019-05-05
• Subjects: Dynamic simulation -- CCHP -- Ejector cooling -- Solar energy -- Solar fraction; Heat engineering -- Periodicals; Heating -- Equipment and supplies -- Periodicals; Periodicals; 621.40205
• DOI: 10.1016/j.applthermaleng.2019.02.114
• Languages: English
• ISSNs: 1359-4311

Abstract

Highlights: A solar combined, ejector CCHP system can satisfy all building energy demands. Increasing hot storage tank size does not improve the system thermal performance. Increasing the turbine inlet pressure decreases the efficiency and solar fraction. Decreasing the turbine inlet temperature decreases the system efficiency. Decreasing the turbine inlet temperature enhances the solar fraction. Abstract: In this study, a year-round dynamic simulation of a Combined Cooling, Heating and Power generation (CCHP) system has been performed. The proposed system is composed of an ejector cooling system, an Organic Rankine Cycle (ORC), a solar collector field, heat exchangers and hot and cold storage tanks. It is considered that, a portion of the system input energy is provided by a solar collector field and an auxiliary heater supplies the extra required energy. The dynamic simulation of the introduced CCHP system is performed. The developed model is used to evaluate a year-round performance of the system for a residential building located in Tehran. The obtained results indicated that the proposed CCHP system can satisfy the building energy demand. Furthermore, it is shown that the ejector cooling system can provide the required cooling load during the hot season. The obtained results indicated that increasing the hot storage tank size does not improve the system performance, but, it can shift the system peak load. Also, by increasing the turbine inlet pressure from 1500 kPa to 2500 kPa, the overall system efficiency and solar fraction have decreased by 14.2% and 23.5%, respectively. Moreover, by decreasing the turbine inlet temperature from 110 °C to 90 °C, the system overall efficiency has decreased about 26%, but the solar fraction has enhanced about 11%. Furthermore, by increasing the solar collector filed area from 200 m 2 to 400 m 2 and 800 m 2, the solar fraction has increased about 93% and 226%, respectively.