Exhaust waste heat recovery from a heavy-duty truck engine: Experiments and simulations

Rijpkema, Jelmer Johannes; Erlandsson, Olof; Munch, Karin

doi:10.1016/j.energy.2021.121698

Cited by 11 publications

(6 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…One of these concerns relates to the recovery of waste heat discharged from the engine. The main technologies available for waste heat recovery are as follows: thermoelectric generators [2]; thermoacoustic generators [3]; turbocompound systems [4]; technologies using thermal cycles (steam Rankine [5]; organic Rankine [6]; Stirling [7] and Brayton with air [8] or with CO2 [9]) and refrigeration systems [10]). The purpose of waste heat recovery systems is to recover as much heat as possible to convert it into electricity or cold.…”

Section: Introductionmentioning

confidence: 99%

Energy Analysis of Waste Heat Recovery Using Supercritical CO2 Brayton Cycle for Series Hybrid Electric Vehicles

Mocanu,

Iosifescu,

Ion

et al. 2024

Energies

View full text Add to dashboard Cite

Waste heat recovery from exhaust gas is one of the most convenient methods to save energy in internal combustion engine-driven vehicles. This paper aims to investigate a reduction in waste heat from the exhaust gas of an internal combustion engine of a serial Diesel–electric hybrid bus by recovering part of the heat and converting it into useful power with the help of a split-flow supercritical CO2 (sCO2) recompression Brayton cycle. It can recover 17.01 kW of the total 33.47 kW of waste heat contained in exhaust gas from a 151 kW internal combustion engine. The thermal efficiency of the cycle is 38.51%, and the net power of the cycle is 6.55 kW. The variation in the sCO2 temperature at the shutdown of the internal combustion engine is analyzed, and a slow drop followed by a sudden and then a slow drop is observed. After 80 s from stopping the engine, the temperature drops by (23–33)% depending on the tube thickness of the recovery heat exchanger. The performances (net power, thermal efficiency, and waste heat recovery efficiency) of the split-flow sCO2 recompression Brayton cycle are clearly superior to those of the steam Rankine cycle and the organic Rankine cycle (ORC) with cyclopentane as a working fluid.

show abstract

Section: Introductionmentioning

confidence: 99%

Energy Analysis of Waste Heat Recovery Using Supercritical CO2 Brayton Cycle for Series Hybrid Electric Vehicles

Mocanu,

Iosifescu,

Ion

et al. 2024

Energies

View full text Add to dashboard Cite

show abstract

“…[5][6][7] Heat pipes and thermoelectric generators as a combination have the capability to form solid, robust, passive WHR systems. 8,9 Exhaust gas recirculation (EGR) is another effective means to make use of waste heat and reduce NO x formation. 10 Chemical heat storage (CHS) and the organic rankine cycle assist in utilizing the waste heat.…”

Section: Introductionmentioning

confidence: 99%

“…10 Chemical heat storage (CHS) and the organic rankine cycle assist in utilizing the waste heat. 8,9 Experiments using cascaded TES for WHR from a diesel engine exhaust indicated that "the majority of heat is present at higher temperatures for discharge applications and virtually at the PCM phase change temperature." 10 Heat pipes with TES help enhance the TES unit's performance.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Energy and exergy analysis of latent heat storage with heat pipe encased in phase change material

Pise,

Nandgaonkar

2023

Proceedings of the Institution of Mechanical Engineers, Part A:

View full text Add to dashboard Cite

Loop heat pipe (LHP) encased in phase change material (PCM) incorporated annular to catalytic converter (CC) is proposed to augment the performance of the “thermal energy storage” (TES). LHP are designed to extract surplus heat from the exhaust discharge, thereby reducing the amount of exhaust heat emitted into the atmosphere. A four-cylinder IC engine’s CC is considered with Mg70Zn24.9Al5.1, paraffin oil as PCM and working fluid for the heat pipe are evaluated. A comparative experimental investigation was performed considering two models for CC with and without heat pipe integrated in the TES for (i) distribution of average PCM temperature (ii) energy, exergy efficiency and distribution (iii) effectiveness (iv) instantaneous waste heat recovered during heat storage. Transient cycles at 2000 r/min with varying load conditions were run considering city drive conditions. Heat storage for CC with heat pipe encased in TES was found to be 35% faster, whereas discharge time for CC without heat pipe developed in TES was found to be longer. For melt fraction 1, maximum exergy efficiencies of 71% and 69% were observed for the TES unit with and without heat pipe. Heat pipes are observed to help extract a considerable amount of surplus heat from exhaust and reduce the exhaust gas outlet temperature released into the atmosphere by nearly 130 – 40°C under various load circumstances.

show abstract

“…After ruling out several heat exchanger geometries, the heat recovery heat exchanger features twisting helical coils between the exhaust pipe and an additional outer pipe. Although the practical realization of the system is the main focus of the article, further information on the control system is provided by Ripjkema et al [211] in a separate work. Substantial agreement between experimental and calculated reductions in fuel consumption was present at engine power >20 kW, with reductions in fuel consumption growing from around 5 to 7%.…”

mentioning

confidence: 99%

Review of Organic Rankine Cycles for Internal Combustion Engine Waste Heat Recovery: Latest Decade in Review

Sprouse

2024

Sustainability

View full text Add to dashboard Cite

The last decade (2013–2023) was the most prolific period of organic Rankine cycle (ORC) research in history in terms of both publications and citations. This article provides a detailed review of the broad and voluminous collection of recent internal combustion engine (ICE) waste heat recovery (WHR) studies, serving as a necessary follow-on to the author’s 2013 review. Research efforts have targeted diverse applications (e.g., vehicular, stationary, and building-based), and it spans the full gamut of engine sizes and fuels. Furthermore, cycle configurations extend far beyond basic ORC and regenerative ORC, particularly with supercritical, trilateral, and multi-loop ORCs. Significant attention has been garnered by fourth-generation refrigerants like HFOs (hydrofluoroolefins), HFEs (hydrofluoroethers), natural refrigerants, and zeotropic mixtures, as research has migrated away from the popular HFC-245fa (hydrofluorocarbon). Performance-wise, the period was marked by a growing recognition of the diminished performance of physical systems under dynamic source conditions, especially compared to steady-state simulations. Through advancements in system control, especially using improved model predictive controllers, dynamics-based losses have been significantly reduced. Regarding practically minded investigations, research efforts have ameliorated working fluid flammability risks, limited thermal degradation, and pursued cost savings. State-of-the-art system designs and operational targets have emerged through increasingly sophisticated optimization efforts, with some studies leveraging “big data” and artificial intelligence. Major programs like SuperTruck II have further established the ongoing challenges of simultaneously meeting cost, size, and performance goals; however, off-the-shelf organic Rankine cycle systems are available today for engine waste heat recovery, signaling initial market penetration. Continuing forward, next-generation engines can be designed specifically as topping cycles for an organic Rankine (bottoming) cycle, with both power sources integrated into advanced hybrid drivetrains.

show abstract

Exhaust waste heat recovery from a heavy-duty truck engine: Experiments and simulations

Cited by 11 publications

References 51 publications

Energy Analysis of Waste Heat Recovery Using Supercritical CO2 Brayton Cycle for Series Hybrid Electric Vehicles

Energy Analysis of Waste Heat Recovery Using Supercritical CO2 Brayton Cycle for Series Hybrid Electric Vehicles

Energy and exergy analysis of latent heat storage with heat pipe encased in phase change material

Review of Organic Rankine Cycles for Internal Combustion Engine Waste Heat Recovery: Latest Decade in Review

Contact Info

Product

Resources

About