Performance evaluation and parametric optimization strategy of a thermocapacitive heat engine to harvest low-grade heat

2019 ◽  
Vol 184 ◽  
pp. 40-47 ◽  
Author(s):  
Jian Lin ◽  
Zhihui Zhang ◽  
Xingyi Zhu ◽  
Chao Meng ◽  
Ning Li ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Parametric Optimization ◽  
Heat Engine ◽  
Low Grade ◽  
Optimization Strategy ◽  
Low Grade Heat

Thermolytic osmotic heat engine for low-grade heat harvesting: Thermodynamic investigation and potential application exploration

2020 ◽  
Vol 259 ◽  
pp. 114192
Author(s):  
Xin Tong ◽  
Su Liu ◽  
Junchen Yan ◽  
Osvaldo A. Broesicke ◽  
Yongsheng Chen ◽  
...  
Keyword(s):  
Potential Application ◽  
Heat Engine ◽  
Low Grade ◽  
Thermodynamic Investigation ◽  
Low Grade Heat

Membrane-Based Osmotic Heat Engine with Organic Solvent for Enhanced Power Generation from Low-Grade Heat

2015 ◽  
Vol 49 (9) ◽  
pp. 5820-5827 ◽  
Author(s):  
Evyatar Shaulsky ◽  
Chanhee Boo ◽  
Shihong Lin ◽  
Menachem Elimelech
Keyword(s):  
Power Generation ◽  
Organic Solvent ◽  
Heat Engine ◽  
Low Grade ◽  
Low Grade Heat

scholarly journals Optimization of a Thermomagnetic Heat Engine for Harvesting Low Grade Thermal Energy

Energies ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5768
Author(s):  
Zeeshan ◽  
Muhammad Uzair Mehmood ◽  
Sungbo Cho
Keyword(s):  
Thermal Energy ◽  
Heat Engine ◽  
Integrated Approach ◽  
Heat Transfer Fluid ◽  
Low Grade ◽  
Heat Sources ◽  
Energy Harvesters ◽  
Output Performance ◽  
Depth Analysis ◽  
Low Grade Heat

Thermomagnetic energy harvesters are one form of technology that can be effectively used to extract energy from low grade heat sources, without causing damage to the environment. In this study, we investigated the output performance of our previously designed thermomagnetic heat engine, which was developed to extract thermal energy by exploiting the magnetocaloric effect of gadolinium. The proposed heat engine uses water as the heat transfer fluid, with heat sources at a temperature in the range 20–65 °C. Although this method turned out to be a promising solution to extract thermal energy, the amount of energy extracted through this geometry of thermomagnetic engine was limited and depends on the interaction between magnetic flux and magnetocaloric material. Therefore, in this paper we carry out an in-depth analysis of the designed thermomagnetic heat engine with an integrated approach of numerical simulation and experimental validation. The computational model improved recognition of the critical component to developing an optimized model of the thermomagnetic heat engine. Based on the simulation result, a new working model was developed that showed a significant improvement in the rpm and axial torque generation. The results indicate that the peak RPM and torque of the engine are improved by 34.3% and 32.2%, respectively.

Experimental Study of the Minto Engine—A Heat Engine for Converting Low Grade Heat to Mechanical Energy

2004 ◽  
Vol 126 (1) ◽  
pp. 661-667 ◽  
Author(s):  
Terence I. Quickenden ◽  
Kathryn M. Hindmarsh ◽  
Kean-Guan Teoh
Keyword(s):  
Experimental Study ◽  
Mechanical Energy ◽  
Heat Engine ◽  
Heat Energy ◽  
Working Fluid ◽  
Low Grade ◽  
Long Period ◽  
Short Period ◽  
Low Grade Heat ◽  
Liquid Piston

The Minto engine is a liquid piston heat engine that converts heat energy into mechanical energy. Evaporation of the heated, volatile working fluid pushes it upwards against gravity. This causes the device to tip over and rotate. A 500 mm diameter Minto engine which used petroleum ether as the working fluid, was built and was operated between 344 K and 294 K. Thermal efficiencies of up to 0.25% (i.e. 1.7% of the Carnot maximum) were measured. This engine behaves as a power amplifier. It absorbs low grade heat over a long period of time and suddenly releases it as a pulse of mechanical energy over a short period of time.

scholarly journals Comparative life-cycle assessment of a novel osmotic heat engine and an organic Rankine cycle for energy production from low-grade heat

2018 ◽  
Vol 191 ◽  
pp. 490-501 ◽  
Author(s):  
Kerri L. Hickenbottom ◽  
Leslie Miller-Robbie ◽  
Johan Vanneste ◽  
Junko Munakata Marr ◽  
Michael B. Heeley ◽  
...  
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Energy Production ◽  
Heat Engine ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Low Grade ◽  
Low Grade Heat ◽  
Comparative Life Cycle Assessment

Energy Storage and Waste Heat Recovery: A Synergistic Effect Benefiting Renewable Energy

2011 ◽  
Author(s):  
Richard B. Peterson ◽  
Robbie Ingram-Goble ◽  
Kevin J. Harada ◽  
Hailei Wang
Keyword(s):  
Renewable Energy ◽  
Energy Storage ◽  
Heat Pump ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Heat Engine ◽  
Low Grade ◽  
Round Trip ◽  
Low Grade Heat

In order for renewable energy to displace 20% or more of the conventional power generating base without depending on significant hot spinning reserves, reliable and cost effective energy storage will be needed at the utility scale. Developing and deploying practical energy storage at this level is a major challenge and no single technology appears to have a dominant position. Storing electrical energy by way of thermal storage at moderate-to-low temperatures has not received much attention in the past. In fact, the conventional thinking is that heat pump/heat engine mediated energy storage is too inefficient (round trip efficiency of 30% or lower) to be practical. However, an innovative and efficient storage approach is proposed in this paper by incorporating sensible heat storage in a Rankine-type heat pump/heat engine cycle to increase the round trip efficiency. Furthermore, by using a source of waste (or otherwise low-grade) heat, round trip efficiencies can be enhanced further. Currently, there appears to be no significant linkage between waste heat recovery and grid-level energy storage, although the market opportunity for each is considerable. Using the thermal approach described here, a system can be created that uses very low-grade heat in the range between 50 to 70 °C. Furthermore, conventional technology can be used to implement the system where no extreme conditions are present anywhere in the cycle. Hence, it is thought to have advantages over other energy storage concepts being developed.

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