A Review of Engine Advanced Cycle and Rankine Bottoming Cycle and Their Loss Evaluations

Chen, Simon K.; Lin, Rocky

doi:10.4271/830124

Cited by 18 publications

(7 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Three ways of controlling the steam engine operation were tested: engine operation with variable shaft speed at constant shut-offs, engine operation with variable shut-offs at constant shaft speed and engine operation controlled by a steam pressure regulating valve. In [17], the possibilities of using the Clausius-Rankine multi-stage system to improve the efficiency of the combined heat and electricity production process were discussed. On the other hand, the example of the ORC system powered by the biomass boiler was studied in [18].…”

Section: Systems Operating According To Rankine and Organic Rankine Cmentioning

confidence: 99%

Prototypical Biomass-Fired Micro-Cogeneration Systems—Energy and Ecological Analysis

Sornek

2020

Energies

View full text Add to dashboard Cite

Combined heat and power systems dedicated to micro-scale applications are currently increasing in popularity. The use of such systems is beneficial from the standpoint of increasing the usage of renewable energy, increasing energy efficiency and reducing CO2 emissions into the atmosphere. This paper shows two examples of prototypical micro-cogeneration systems powered by biomass. In the first, smaller one, electricity is generated in thermoelectric generators using heat from the wood-fired stove. The second one is equipped with a 100 kWt batch boiler and operates according to a modified Rankine cycle. The energy and ecological analysis were conducted and discussed, including selected aspects of heat and power generation and gaseous pollutant emission. Measurements were performed using a dedicated control and measurement station with a PLC controller. As was shown, thermoelectric generators operated respectively with the power of 22.5 We in the case of the air-cooled unit and 31.2 We in the case of the water-cooled unit. On the other hand, the maximum power level of ca. 1145 We was obtained in the system with a batch boiler operating according to a modified Rankine cycle. The ecological analysis showed that the average amount of CO emission during the wood combustion in the tested stove was 1916 mg/m3 (in the combustion phase). In the case of straw combustion, it was characterized by lower CO2 emissions compared to coal, but higher CO2 emissions compared to gasoline and natural gas. Based on the obtained results, some outlines for the systems development were given.

show abstract

Section: Systems Operating According To Rankine and Organic Rankine Cmentioning

confidence: 99%

Prototypical Biomass-Fired Micro-Cogeneration Systems—Energy and Ecological Analysis

Sornek

2020

Energies

View full text Add to dashboard Cite

show abstract

“…those dissipated between piston and cylinder) are removed by the coolant. The other half of the friction losses can be found in the oil [4]. Initially, the enthalpy of the exhaust gas consists of sensible enthalpy (60 per cent), residual kinetic energy (7 per cent), some from incomplete combustion (20 per cent) and the heat transferred to the exhaust system (12 per cent), part of which is radiated towards the ambient and the remainder transferred to the coolant [8].…”

Section: Power Balance Of An Internal Combustion Enginementioning

confidence: 99%

“…Many suggested systems provide the addition of the recovered mechanical power to the shaft by means of a gear. Chen and Lin [4] reviewed Rankine cycles to be used with advanced ICEs. Kamo and Bryzik [5] analysed possibilities oered by turbocompounding.…”

Section: Introductionmentioning

confidence: 99%

Internal combustion engine waste heat potential for an automotive absorption system of air conditioning Part 1: Tests on the exhaust system of a spark-ignition engine

Boatto

Boccaletti

Cerri

et al. 2000

Proceedings of the Institution of Mechanical Engineers, Part D:

View full text Add to dashboard Cite

show abstract

“…Waste heat recovery in automotive engines was accomplished in 1980, by advanced combustion cycles; turbocompounding and regenerative supercharging [18,19]. Several combustion engines have low temperature waste heat sources that cannot be efficiently recovered.…”

Section: Introductionmentioning

confidence: 99%

Second Law Assessment of a Wet Ethanol Fuelled HCCI Engine Combined With Organic Rankine Cycle

Khaliq

Trivedi²

2012

Journal of Energy Resources Technology

View full text Add to dashboard Cite

In this study, first and second law analyses of a new combined power cycle based on wet ethanol fuelled homogeneous charge compression ignition (HCCI) engine and an organic Rankine cycle are presented. A computational analysis is performed to evaluate first and second law efficiencies, with the latter providing good guidance for performance improvement. The effect of changing turbocharger pressure ratio, organic Rankine cycle (ORC) evaporator pinch point temperature, turbocharger compressor efficiency, and ambient temperature have been observed on cycle's first law efficiency, second law efficiency, and exergy destruction in each of its component. A first law efficiency of 41.5% and second law efficiency of 36.9% were obtained for the operating conditions (To = 300 K, r" = 3, f]j = 80%). The first law efficiency and second law efficiency of the combined power cycle significantly vaiy with the change in the turbocharger pressure ratio, but the change in pinch point temperature, turbocharger efficiency, and ambient temperature shows small variations in these efficiencies. Second law analysis demonstrates well how the fuel exergy is used, lost, and reused in all of the cycle components. It was found that 78.9% of the total input exergy is lost: 2.0% to the environment in the flue and 76.9% due to irreversibilities in the components. The biggest exergy loss occurs in the HCCI engine which is 68.7%, and the second largest exergy loss occurs in catalytic converter, i.e., nearly 3.13%. Results clearly show that performance evaluation based on first law analysis alone is not adequate, and hence more meaningful evaluation must include second law analysis.

show abstract

A Review of Engine Advanced Cycle and Rankine Bottoming Cycle and Their Loss Evaluations

Cited by 18 publications

References 8 publications

Prototypical Biomass-Fired Micro-Cogeneration Systems—Energy and Ecological Analysis

Prototypical Biomass-Fired Micro-Cogeneration Systems—Energy and Ecological Analysis

Internal combustion engine waste heat potential for an automotive absorption system of air conditioning Part 1: Tests on the exhaust system of a spark-ignition engine

Second Law Assessment of a Wet Ethanol Fuelled HCCI Engine Combined With Organic Rankine Cycle

Contact Info

Product

Resources

About