Inherently safety design of a dual-loop bi-evaporator combined cooling and power system: 4E and safety based optimization approach
| Autor: | Mohammad Ebadollahi, Hadi Rostamzadeh, Omid Pourali, Majid Amidpour, Hadi Ghaebi |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Exergy
Environmental Engineering business.industry General Chemical Engineering Prime mover Electric power system Cogeneration Electricity generation Waste heat Exergy efficiency Environmental Chemistry Environmental science Safety Risk Reliability and Quality Process engineering business Degree Rankine |
| Zdroj: | Process Safety and Environmental Protection. 154:393-409 |
| ISSN: | 0957-5820 |
| DOI: | 10.1016/j.psep.2021.08.036 |
| Popis: | In this article, a dual-loop bi-evaporator CCP (combined cooling and power) system is presented to simultaneously supply electricity, air-conditioning, and freezing demands. The system consists of two organic Rankine cycles (ORCs) for power generation and two ejector cooling cycles (ECCs) for cooling production which is adjusted at two different cooling temperature levels, using waste heat from the exhaust gases of a biogas plant as prime mover. The system is investigated from energy, exergy, exergoeconomic, exergoenvironmental, and safety standpoints. Later, the performance of the devised unit is optimized by simultaneously accounting the central metrics obtained from 4E + safety analysis. Four benchmarks with the same applications (i.e., cogeneration of power and cooling at two different temperature levels) are selected and the superiorities of the present CCP system over these previously available systems are investigated. At optimal point, the net power, air-conditioning, and freezing products are computed 96.59 kW, 302.4 kW, and 23.01 kW, respectively. Furthermore, the optimal energy efficiency, exergy efficiency, unit cost of product, environmental impact of product, and total risk are calculated 56.09 %, 25.45 %, 37.54 $/GJ, 4026 mPts/GJ, and 1716 $/Year, respectively. Moreover, the generator is recognized as the main source of irreversibility, while the pump used in the high-temperature circuit has the highest amount of risk level between all components. By rising the heat source temperature, the energy efficiency, unit cost of product, environmental impact of product, and total risk level are increased, while the exergy efficiency is reduced. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect