Efficiency analysis of trilateral-cycle power systems for waste heat recovery-to-power generation

Following the increasing interest of aero-naval industry to design and build systems that might provide fuel and energy savings, this study wants to point out the possibility to produce an increase in the power output from the prime mover propulsion systems of aircrafts. The complexity of using steam heat recovery systems, as well as the lower expected cycle efficiencies, temperature limitations, toxicity, material compatibilities, and/or costs of organic fluids in Rankine cycle power systems, precludes their consideration as a solution to power improvement for this application in turboprop engines. The power improvement system must also comply with the space constraints inherent with onboard power plants, as well as the interest to be economical with respect to the cost of the power recovery system compared to the fuel that can be saved per flight exercise. A waste heat recovery application of the CO2 supercritical cycle will culminate in the sizing of the major components.

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High efficiency GeTe-based materials and modules for thermoelectric power generation

Energy & Environmental Science ◽

10.1039/d0ee02791j ◽

2021 ◽

Author(s):

Tong Xing ◽

Qingfeng Song ◽

Pengfei Qiu ◽

Qihao Zhang ◽

Ming Gu ◽

...

Keyword(s):

Power Generation ◽

Thermoelectric Power ◽

Heat Recovery ◽

Waste Heat Recovery ◽

High Efficiency ◽

Waste Heat ◽

Thermoelectric Performance ◽

Thermoelectric Generators ◽

Thermoelectric Power Generation

GeTe-based materials have a great potential to be used in thermoelectric generators for waste heat recovery due to their excellent thermoelectric performance, but their module research is greatly lagging behind...

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Potential of Organic Rankine Cycle for waste heat recovery from piston engine-based power plants in isolated power systems

Applied Thermal Engineering ◽

10.1016/j.applthermaleng.2021.117815 ◽

2021 ◽

pp. 117815

Author(s):

Óscar García-Afonso ◽

Agustín M. Delgado-Torres ◽

Benjamín González-Díaz

Keyword(s):

Power Systems ◽

Heat Recovery ◽

Waste Heat Recovery ◽

Power Plants ◽

Waste Heat ◽

Organic Rankine Cycle ◽

Rankine Cycle ◽

Piston Engine

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Analisis Kinerja Sistem Proteksi Type M-3425A pada Generator di WHRPG PT. Semen Padang

Jurnal Sains dan Teknologi Industri ◽

10.24014/sitekin.v17i2.10333 ◽

2020 ◽

Vol 17 (2) ◽

pp. 81

Author(s):

Liliana Liliana

Keyword(s):

Power Generation ◽

Kyoto Protocol ◽

Clean Development Mechanism ◽

Heat Recovery ◽

Waste Heat Recovery ◽

Waste Heat ◽

Generator Protection ◽

Development Mechanism

Waste Heat Recovery Power Generation (WHRPG) adalah sebuah sistem mengkonservasi energi dan menunjang pembangunan bersih atau Clean Development Mechanism (CDM) yang merupakan implementasi dari Kyoto Protocol. Sistem ini terbukti dapat menurunkan emisi CO2 sebesar 47.000 ton per tahun. WHRPG menggunakan generator sinkron dengan kapasitas 8,5 MW dilengkapi dengan sistem eksitasi tanpa sikat. Pengoperasian WHRPG yang kontinyu harus didukung dengan pengoperasian generator dengan pengamanan yang optimal. Generator harus terus dilindungi dari gangguan-gangguan yang mungkin terjadi. Pengamanan Generator telah dilengkapi dengan Generator Protection Type M-3425 yang terdiri atas beberapa jenis pengamanan di dalamnya. Penelitian ini bertujuan untuk menganalisis kinerja proteksi pada generator khususnya terhadap gangguan tegangan lebih dan frekuensi rendah berupa kenaikan tegangan mencapai 45% dan gangguan penurunan frekuensi mencapai 6 % . Penelitian ini mengidentifikasi ketepatan kinerja relay Over Current Relay dan under frequency Relay dalam melaksanakan pengamanan gangguan tersebut. Hasil pemantauan dan analisis dinyatakan bahwa kedua relay dapat dengan cepat membaca gangguan yang terjadi, selanjutnya memberi isyarat untuk mengaktifkan lock out relay, alarm dan lampu indikator sehingga gangguanpun dengan segera dapat diatasi sehingga potensi kerusakan yang bisa terjadi pada generator bisa diminimalisir.

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