Ability of adjusting heating/power for combined cooling heating and power system using alternative gas turbine operation strategies in combined cycle units

Huang, Zhifeng; Yang, Cheng; Yang, Haixia; Ma, Xiaoqian

doi:10.1016/j.enconman.2018.07.062

Cited by 41 publications

(7 citation statements)

References 34 publications

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“…However, for a LNG fueled thermal power plant, the LNG cold energy from the power plant itself is insufficient to fully condense the fuel gas. For example, the natural gas mass flow is only about 13 kg/s while the fuel gas mass flow rate approaches as high as 621 kg/s in the CCGT plant [83]. This is attributed to the fact that the fuel gas contains a large portion of non-condensed gas, such as nitrogen and oxygen.…”

Section: Cryogenic Co 2 Capturementioning

confidence: 99%

Sustainable energy recovery from thermal processes: a review

2022

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Background With the increasing concerns on the energy shortage and carbon emission issues worldwide, sustainable energy recovery from thermal processes is consistently attracting extensive attention. Nowadays, a significant amount of usable thermal energy is wasted and not recovered worldwide every year. Meanwhile, discharging the wasted thermal energy often causes environmental hazards. Significant social and ecological impacts will be achieved if waste thermal energy can be effectively harnessed and reused. Hence, this study aims to provide a comprehensive review on the sustainable energy recovery from thermal processes, contributing to achieving energy security, environmental sustainability, and a low-carbon future. Main text To better understand the development of waste thermal energy utilization, this paper reviews the sustainable thermal energy sources and current waste energy recovery technologies, considering both waste heat and cold energy. The main waste heat sources are prime movers, renewable heat energy, and various industrial activities. Different waste heat recovery technologies to produce electricity, heating, and cooling are analyzed based on the types and temperatures of the waste heat sources. The typical purposes for waste heat energy utilization are power generation, spacing cooling, domestic heating, dehumidification, and heat storage. In addition, the performance of different waste heat recovery systems in multigeneration systems is introduced. The cold energy from the liquified natural gas (LNG) regasification process is one of the main waste cold sources. The popular LNG cold energy recovery strategies are power generation, combined cooling and power, air separation, cryogenic CO2 capture, and cold warehouse. Furthermore, the existing challenges on the waste thermal energy utilization technologies are analyzed. Finally, potential prospects are discussed to provide greater insights for future works on waste thermal energy utilization. Conclusions Novel heat utilization materials and advanced heat recovery cycles are the key factors for the development of waste high-temperature energy utilization. Integrated systems with multiply products show significant application potential in waste thermal energy recovery. In addition, thermal energy storage and transportation are essential for the utilization of harnessed waste heat energy. In contrast, the low recovery rate, low utilization efficiency, and inadequate assessment are the main obstacles for the waste cold energy recovery systems.

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Section: Cryogenic Co 2 Capturementioning

confidence: 99%

Sustainable energy recovery from thermal processes: a review

2022

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“…However, humidified regimes need to be carefully understood to avoid combustion and ignition problems [38]. Once the limits of steam injection are known and their effects on the flame/combustion process minimized, the method can be effectively implemented in CCHP units while making use of cooling and heating properties of various streams, thus optimising energy consumption and enabling operation under off-design conditions [39,40]. Steam injection in a cycle is considered to be an optimal way for the recovery of waste heat [41].…”

Section: Introductionmentioning

confidence: 99%

“…Large scale CCHP systems are often a combination of gas turbine and steam turbines. These configurations are usually set up to support district heating/cooling demand with improvements on energy saving as well as carbon dioxide emissions reduction [39]. Combinations of Rankine cycles, organic Rankine cycles (ORC) and gas turbines in triple combined systems can deliver 47.65% thermal efficiency [45].…”

Section: Introductionmentioning

confidence: 99%

Humidified ammonia/hydrogen RQL combustion in a trigeneration gas turbine cycle

Božo¹,

Mashruk

Zitouni

et al. 2021

Energy Conversion and Management

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“…Huang et al [12] analyzed the gas turbine combined cycle based on the utilization of waste energy for combined cooling, heating, and power. They used the turbine inlet temperature (TIT) strategy and inlet guide vanes (IGV) strategy for the gas turbine to adopt the part-load performance.…”

Section: Introductionmentioning

confidence: 99%

Recovering waste energy of the combined gas turbine system using paraffin melting

Najjar

Irbai²

2020

JMES

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This work covers waste energy utilization of the combined power cycle by using it in the candle raw material (paraffin) melting process and an economic study for this process. After a partial utilization of the burned fuel energy in a real bottoming steam power generation, the exhaust gas contains 0.033 of the initially burned energy. This tail energy with about 128 ºC is partly driven in the heat exchanger of the paraffin melting system. Ansys-Fluent Software was used to study the paraffin wax melting process by using a layered system that utilizes an increased interface area between the heat transfer fluid (HTF) and the phase change material (PCM) to improve the paraffin melting process. The results indicate that using 47.35 kg/s, which is 5% of the entire exhaust gas (881.33 kg/s) from the exit of the combined power cycle, would be enough for producing 1100 tons per month, which corresponds to the production quantity by real candle's factories. Also, 63% of the LPG cost will be saved, and the payback period of the melting system is 2.4 years. Moreover, as the exhaust gas temperature increases, the consumed power and the payback period will decrease.

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Ability of adjusting heating/power for combined cooling heating and power system using alternative gas turbine operation strategies in combined cycle units

Cited by 41 publications

References 34 publications

Sustainable energy recovery from thermal processes: a review

Sustainable energy recovery from thermal processes: a review

Humidified ammonia/hydrogen RQL combustion in a trigeneration gas turbine cycle

Recovering waste energy of the combined gas turbine system using paraffin melting

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