Investigation of a cascade waste heat recovery system based on coupling of steam Rankine cycle and NH3-H2O absorption refrigeration cycle

Liang, Youcai; Sun, Zhili

doi:10.1016/j.enconman.2018.04.064

Cited by 45 publications

(5 citation statements)

References 20 publications

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“…A significant portion of the waste heat can be recovered and utilized to make a contribution to energy efficiency enhancement and Greenhouse Gas Emission reduction targets. The vast majority of this energy, is normally available at low temperatures below 95 °C, which makes it difficult to use directly within the plant or converted economically to electrical power using conventional steam Rankine cycle (Liang et al 2018(Liang et al , 2014.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of an Organic Rankine cycle system using an oil-free scroll expander for low grade heat recovery

Liang

2021

International Journal of Green Energy

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Organic Rankine cycle (ORC) has become a promising energy harvesting technique to recover thermal energy from low-grade heat sources. In this study, a lab-scale ORC system has been designed, constructed, and tested to investigate the potential of utilizing the heat from hot water, which is used to simulate the jacket water of internal combustion engines. The ORC system employs an oil-free scroll expander with R245fa as working fluid. A wide range of operating conditions has been studied by adjusting the pump frequency, the load and the mass flow rate of cooling water. Effect of the superheat degree at the expander inlet was investigated and the results showed that the ORC system presented better performance with superheat of 0. It is concluded that the system should be controlled to maintain the least possible superheat degree to obtain higher power output and better efficiency. The maximum electric power output and the maximum thermal efficiency are 0.61 kW and 4.09%, respectively, when the heat source is 96.8°C. The power consumed by the pump ranges from 0.07 to 0.18 kW, which accounts for 22 to 39% of the power output of ORC.

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Section: Introductionmentioning

confidence: 99%

Experimental investigation of an Organic Rankine cycle system using an oil-free scroll expander for low grade heat recovery

Liang

2021

International Journal of Green Energy

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“…When considering a case where the heat pump was located at a CHP plant, a configuration that increased the DH return temperature proposed the lowest operation cost, as low as 12 EUR MWh-1 for a 90-40 o C district heating network. Liang [13] proposed an electricity-cooling co-generation system based on coupling of a steam Rankine cycle and an absorption refrigeration system to recover the waste heat of marine engine to meet the electricity and cooling demand aboard. The equivalent electricity output of the waste heat recovery 5 of 36 system is 5223 kW, accounting for 7.61% of the rated power output of the marine engine.…”

Section: Coal-fired Co-generation Systemmentioning

confidence: 99%

A Review of Combined Heat and Power (CHP)

Ma¹,

Wang²,

Liu³

et al. 2023

Preprint

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The combined heat and power system is based on the principle of "cascade utilization of thermal energy" for system integration and optimization. The rational utilization of energy, as well as the rational arrangement of energy flow and the process optimization combination of the overall system are taken into account in order to achieve multifunctional goals in the field of thermal engineering. The present paper presents a detailed assessment of combined heat and power systems from above standpoints. This article is divided into two parts “CHP based on thermo-dynamic cycles” and “CHP based on non-thermodynamic cycles”. Each part is then classified based on power subsystem energy consumption efficiency (high or low), including Rankine cycle, ORC, Stirling cycle, gas turbine, reciprocating engine, PVT and fuel cell. The present paper also helps identify the research gaps in this area and provides direction on future studies on combined heat and power systems.

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“…One effective way to recover the condensation latent heat is using LiBr/H 2 O absorption refrigeration systems, which are available to utilize the heat source with a temperature ranging from 50 • C to 200 • C [25]. Liang et al [24,26] investigated a cogeneration system by coupling an SRC and an SEAC to recover the waste heat of a marine engine. Their research indicated that the exergy efficiency of the cogeneration system increases by 84% compared with the basic SRC under conditions of a condensation temperature at 323 K and superheat at 100 K. Sahoo et al [27] analyzed a solar-biomass multi-generation system, utilizing the residual heat from the SRC to power an SEAC.…”

Section: Introductionmentioning

confidence: 99%

Exergoeconomic Evaluation of a Cogeneration System Driven by a Natural Gas and Biomass Co-Firing Gas Turbine Combined with a Steam Rankine Cycle, Organic Rankine Cycle, and Absorption Chiller

Liu,

Ren,

Zhang

et al. 2023

Processes

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Considering energy conversion efficiency, pollution emissions, and economic benefits, combining biomass with fossil fuels in power generation facilities is a viable approach to address prevailing energy deficits and environmental challenges. This research aimed to investigate the thermodynamic and exergoeconomic performance of a novel power and cooling cogeneration system based on a natural gas–biomass dual fuel gas turbine (DFGT). In this system, a steam Rankine cycle (SRC), a single-effect absorption chiller (SEAC), and an organic Rankine cycle (ORC) are employed as bottoming cycles for the waste heat cascade utilization of the DFGT. The effects of main operating parameters on the performance criteria are examined, and multi-objective optimization is accomplished with a genetic algorithm using exergy efficiency and the sum unit cost of the product (SUCP) as the objective functions. The results demonstrate the higher energy utilization efficiency of the proposed system with the thermal and exergy efficiencies of 75.69% and 41.76%, respectively, while the SUCP is 13.37 $/GJ. The exergy analysis reveals that the combustion chamber takes the largest proportion of the exergy destruction rate. The parametric analysis shows that the thermal and exergy efficiencies, as well as the SUCP, rise with the increase in the gas turbine inlet temperature or with the decrease in the preheated air temperature. Higher exergy efficiency and lower SUCP could be obtained by increasing the SRC turbine inlet pressure or decreasing the SRC condensation temperature. Finally, optimization results indicate that the system with an optimum solution yields 0.3% higher exergy efficiency and 2.8% lower SUCP compared with the base case.

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Investigation of a cascade waste heat recovery system based on coupling of steam Rankine cycle and NH3-H2O absorption refrigeration cycle

Cited by 45 publications

References 20 publications

Experimental investigation of an Organic Rankine cycle system using an oil-free scroll expander for low grade heat recovery

Experimental investigation of an Organic Rankine cycle system using an oil-free scroll expander for low grade heat recovery

A Review of Combined Heat and Power (CHP)

Exergoeconomic Evaluation of a Cogeneration System Driven by a Natural Gas and Biomass Co-Firing Gas Turbine Combined with a Steam Rankine Cycle, Organic Rankine Cycle, and Absorption Chiller

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