Thermodynamic, exergoeconomic and multi-objective optimization analysis of new ORC and heat pump system for waste heat recovery in waste-to-energy combined heat and power plant

Pan, Mingzhang; Lu, Fulu; Zhu, Yan; Huang, Guicong; Yin, Jiwen; Huang, Fuchuan; Chen, Guisheng; Chen, Zhaohui

doi:10.1016/j.enconman.2020.113200

Cited by 51 publications

(8 citation statements)

References 54 publications

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“…A homogeneous distribution of 100 values of p sh are considered to determine the optimum value for maximum performance → p sh,min = p cond ; p sh,max = 0.8 • p crit ; • When considering the irreversibilities of the turbine and the pump, their performances are 85% [35] and 80% [36,37], respectively → η t = 0.85; η p = 0.80; •…”

Section: Methodsmentioning

confidence: 99%

Organic Rankine Cycle Optimization Performance Analysis Based on Super-Heater Pressure: Comparison of Working Fluids

et al. 2021

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The organic Rankine cycle (ORC) is widely accepted to produce electricity from low-grade thermal heat sources. In fact, it is a developed technology for waste-heat to electricity conversions. In this paper, an ORC made up of super-heater, turbine, regenerator, condenser, pump, economizer and evaporator is considered. An optimization model to obtain the maximum performance of such ORC, depending on the super-heater pressure, is proposed and assessed, in order to find possible new working fluids that are less pollutant with similar behavior to those traditionally used. The different super-heater pressures under analysis lie in between the condenser pressure and 80% of the critical pressure of each working fluid, taking 100 values uniformly distributed. The system and optimization algorithm have been simulated in Matlab with the CoolProp library. Results show that the twelve working fluids can be categorized into four main groups, depending on the saturation pressure at ambient conditions (condenser pressure), observing that the fluids belonging to Group 1, which corresponds with the lower condensing pressure (around 100 kPa), provide the highest thermal efficiency, with values around η=23−25%. Moreover, it is also seen that R123 can be a good candidate to substitute R141B and R11; R114 can replace R236EA and R245FA; and both R1234ZE and R1234YF have similar behavior to R134A.

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Section: Methodsmentioning

confidence: 99%

Organic Rankine Cycle Optimization Performance Analysis Based on Super-Heater Pressure: Comparison of Working Fluids

et al. 2021

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“…Finally, the specific exergy (Ψ) and exergy rate ( . Ex) of each state were determined using Equations ( 1) and ( 2), respectively, considering only the physical part of exergy, in other words neglecting the kinetic, potential, and chemical effects [19].…”

Section: Description Of the Developed Mathematical Model For The Adva...mentioning

confidence: 99%

“…The exergy analysis with the highest global exergy efficiency of 27% was in good agreement with the source-oriented design. Pan et al [19] developed and analyzed a novel organic Rankine cycle (ORC) heat pump system for waste-to-energy, which recovered the WH of low-temperature exhaust gas and ultra-low-temperature WH. A higher electrical efficiency of 28.4% was obtained, with an improvement of 6.5% compared to the conventional system.…”

Section: Introductionmentioning

confidence: 99%

Advanced Exergy Analysis of Waste-Based District Heating Options through Case Studies

et al. 2021

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The heating of the buildings, together with domestic hot water generation, is responsible for half of the total generated heating energy, which consumes half of the final energy demand. Meanwhile, district heating systems are a powerful option to meet this demand, with their significant potential and the experience accumulated over many years. The work described here deals with the conventional and advanced exergy performance assessments of the district heating system, using four different waste heat sources by the exhaust gas potentials of the selected plants (municipal solid waste cogeneration, thermal power, wastewater treatment, and cement production), with the real-time data group based on numerical investigations. The simulated results based on conventional exergy analysis revealed that the priority should be given to heat exchanger (HE)-I, with exergy efficiency values from 0.39 to 0.58, followed by HE-II and the pump with those from 0.48 to 0.78 and from 0.81 to 0.82, respectively. On the other hand, the simulated results based on advanced exergy analysis indicated that the exergy destruction was mostly avoidable for the pump (78.32–78.56%) and mostly unavoidable for the heat exchangers (66.61–97.13%). Meanwhile, the exergy destruction was determined to be mainly originated from the component itself (endogenous), for the pump (97.50–99.45%) and heat exchangers (69.80–91.97%). When the real-time implementation was considered, the functional exergy efficiency of the entire system was obtained to be linearly and inversely proportional to the pipeline length and the average ambient temperature, respectively.

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“…Sistemde en uygun akışkanların bütan ve amonyak olduğunu tespit etmişlerdir. Yatırım maliyeti üzerinde buharlaştırıcı basıncının ve aşırı kızdırma sıcaklığının etkisi olduğunu belirtmişlerdir [13].…”

Section: Introductionunclassified

Determination of sensitivity and contribution ratios of parameters affecting Organic Rankine Cycle efficiency with multivariant optimization

Kahraman¹,

Ata²,

Şahin³

2023

Pamukkale J Eng Sci

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Bu çalışmada, Organik Rankine Çevrimi (ORÇ) üze rinde etkisi olan performans parametrelerinin hassasiyet seviyeleri ve katkı oranları belirlenmiştir. Performans parametreleri evaporatör-kondenser pinch point sıcaklık farkı (∆𝑇 𝑃𝑃,𝑒 , ∆𝑇 𝑃𝑃,𝑘 ), soğutma suyu giriş sıcaklığı (𝑇 𝑐,𝑖 ), aşırı kızdırma sıcaklığı (𝑇 𝑎𝑘 ), türbin-pompa izantropik verimleri (𝜂 𝑡 ve 𝜂 𝑝 ) olarak seçilmiştir. Bu parametrelerin ORÇ sistemi üzerindeki etkisi farklı amaç fonksiyonları altında değerlendirilmiştir. İncelenen amaç fonksiyonları; ısıl verim, net güç ve ekserji verimi maksimizasyonu ile toplam tersinmezlik, hacimsel debi oranı (𝑉𝐹𝑅) ve çevresel etki faktör (𝐸𝐸𝐹) minimizasyonudur. Böylece enerji-ekserji analizi ile termodinamik performans, türbin ekonomisinde önemli etkisi olan 𝑉𝐹𝑅 ve termodinamik sürdürülebilirlik indeksleri ile çevresel faktör incelenmiştir. Amaç fonksiyonlarının değişmesiyle performans parametrelerinin etkisinin büyük bir oranda değişkenlik gösterdiği tespit edilmiştir. ∆𝑇 𝑃𝑃,𝑒 'nin etkisi maksimum ısıl verimin elde edilmesinde %20.59 etkili iken, maksimum türbin gücünün elde edilmesinde %71.9 etkili olduğu tespit edilmiştir. Çalışmada Taguchi-ANOVA'dan yararlanılmıştır. L25 ortogonal dizilim kullanılmasıyla amaç fonksiyonlarına ulaşılmasında optimum ortogonal dizilimler ve parametrelerin hassasiyet seviye sıralaması tespit edilmiştir. Tüm amaç fonksiyonlarının eşit oranda etkilediği bir ağırlık fonksiyonu tanımlanmasıyla ORÇ performansı üzerinde %42.85 ∆𝑇 𝑃𝑃,𝑒 ve %25.71 ise 𝑇 𝑐,𝑖 'nin etkisinin olduğu belirlenmiştir. Son olarak; regresyon analizi ile her bir amaç fonksiyonu için performans parametrelerine bağlı olarak denklemler çıkarılmıştır. Ampirik denklem ile tahmin edilen sonuçlar ile nümerik analiz sonuçları arasındaki hata oranları çıkartılmıştır. Bu oranlara bakıldığında ampirik denklemlerin ORÇ performansının belirlenmesinde başarılı bir şekilde kullanılabileceği tespit edilmiştir.

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Thermodynamic, exergoeconomic and multi-objective optimization analysis of new ORC and heat pump system for waste heat recovery in waste-to-energy combined heat and power plant

Cited by 51 publications

References 54 publications

Organic Rankine Cycle Optimization Performance Analysis Based on Super-Heater Pressure: Comparison of Working Fluids

Organic Rankine Cycle Optimization Performance Analysis Based on Super-Heater Pressure: Comparison of Working Fluids

Advanced Exergy Analysis of Waste-Based District Heating Options through Case Studies

Determination of sensitivity and contribution ratios of parameters affecting Organic Rankine Cycle efficiency with multivariant optimization

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