A review of low-temperature heat recovery technologies for industry processes

Li, Xia; Liu, Renmin; Zeng, Yiting; Zhou, Peng; Liu, Jingjing; Cao, Xiangyu; Xiang, Shuguang

doi:10.1016/j.cjche.2018.11.012

Cited by 42 publications

(20 citation statements)

References 167 publications

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“…The upgrading of low‐grade heat is, therefore, required to ensure high recycling efficiency. [ 226 ]…”

Section: Discussionmentioning

confidence: 99%

“…The upgrading of low-grade heat is, therefore, required to ensure high recycling efficiency. [226] The efforts made in developing an accurate modeling of various desalination systems allow the selection of the best components and optimum operating conditions to reduce energy consumption. Modeling and simulation work offers fundamental basis in optimization.…”

Section: Discussionmentioning

confidence: 99%

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Energy Efficient Seawater Desalination: Strategies and Opportunities

2021

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With the change in climate patterns, rapid industrialization, and population growth, the increasing water and energy demand became a major concern in the past decades. Desalination has been touted as the answer to the global water crisis, due to its capability in producing high‐quality fresh water from saline water. The continual research and innovations in the desalination field have resulted in the commercialization of large‐scale desalination in many water scarce regions. In the energetic context, all desalination processes are energy intensive. With the necessity to make desalination a more affordable and sustainable process, the energy efficiency of desalination is becoming an important topic. Herein, it is aimed to provide insights into the recent efforts and strategies established to tackle the energy‐related issues of both, thermal‐based and membrane‐based desalination processes. Depending on the principle of various commercial and emerging desalination processes, the directions of energy efficiency improvements, which include operating condition optimization, high‐performance material development, and renewable energy exploitation are discussed. The ideas and strategies reviewed herein, whether in their implementation or theoretical stage, are expected to provide insights into the possible improvement for application in commercial desalination plants.

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“…The upgrading of low‐grade heat is, therefore, required to ensure high recycling efficiency. [ 226 ]…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Energy Efficient Seawater Desalination: Strategies and Opportunities

2021

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“…Xia et al [14] illustrated that combined comparisons of the optimal scenarios and conditions for different waste heat recovery technologies are going to become relevant in the future. Moreover, they highlighted the selection and modification of the working fluid pairs through various technologies.…”

Section: Introductionmentioning

confidence: 99%

“…Urbanucci et al [24] conducted an HTHPs integration in trigeneration, showing that this integration provides flexibility to cover variable energy demands along with valuable economic and energy performance improvements. According to Xia et al [14], recent studies about heat pumps used for low-grade waste heat recovery are developing multiple stages and cascade systems. Moreover, Johnson et al [25] considered that new working fluids are essential in the development of this emerging technology.…”

Section: Introductionmentioning

confidence: 99%

Multi-objective optimization of a novel reversible High-Temperature Heat Pump-Organic Rankine Cycle (HTHP-ORC) for industrial low-grade waste heat recovery

Mateu-Royo

Navarro-Esbrí

Peris

et al. 2019

Energy Conversion and Management

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Nowadays, a high amount of industrial thermal energy is still lost due to the lack of competitive solutions for energy revalorization. Facing this challenge, this paper presents a novel technology, based on a reversible High-Temperature Heat Pump (HTHP) and Organic Rankine Cycle (ORC). The proposed system recovers low-grade waste heat to generate electricity or useful heat in accordance with consumer demand. Compressor and expander semi-empirical models have been considered for the reversible system computational simulation, being HFC-245fa the working fluid selected. The built-in volume ratio and Internal Heat Exchanger (IHX) effectiveness have been optimized to reach the maximum energy efficiency in each operating condition. Although HFC-245fa exhibits energy performance attributes, its high Global Warming Potential (GWP) is an issue for climate change mitigation. Hence, multi-objective optimisation of the environmentally friendly working fluids Butane, Pentane, HFO-1336mzz(Z), R-514A, HCFO-1233zd(E) and HCFO-1224yd(Z) has been carried out. The results show that the system proposed, working with HFC-245fa, achieves a Coefficient of Performance (COP) of 2.44 for condensing temperature of 140 °C, operating in HTHP mode, whereas the ORC mode provides a net electrical efficiency of 8.7% at condensing temperature of 40 °C. Besides, HCFO-1233zd(E) and HCFO-1224yd(Z) are both appropriate alternatives for the HFC-245fa replacement. These working fluids provide a COP improvement of 9.7% and 5.8% and electrical net efficiency improvement of 2.1% and 0.8%, respectively, compared to HFC-245fa. This paper provides a reference study for further designs and developments of reversible HTHP-ORC systems used for industrial low-grade waste heat recovery.

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“…Practical industrial waste heat (IWH)-based cooling applications have received relatively less attention than solar cooling in the literature: the technology was proposed in some review papers [22,23], and mathematical models for the optimization of district cooling applications based on industrial waste heat recovery have recently been proposed for illustrative case studies from the chemical industry [24,25]. Some techno-economic feasibility assessments of absorption cooling as a recovery option for industrial low-grade waste heat have been performed by Brückner et al [26] for general European IWH potentials, and by Cola et al [27] for a drying process in the textile industry.…”

Section: Introductionmentioning

confidence: 99%

Carbon and Water Footprint of Energy Saving Options for the Air Conditioning of Electric Cabins at Industrial Sites

et al. 2019

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Modern electric and electronic equipment in energy-intensive industries, including electric steelmaking plants, are often housed in outdoor cabins. In a similar manner as data centres, such installations must be air conditioned to remove excess heat and to avoid damage to electric components. Cooling systems generally display a water–energy nexus behaviour, mainly depending on associated heat dissipation systems. Hence, it is desirable to identify configurations achieving both water and energy savings for such installations. This paper compares two alternative energy-saving configurations for air conditioning electric cabins at steelmaking sites—that is, an absorption cooling based system exploiting industrial waste heat, and an airside free-cooling-based system—against the traditional configuration. All systems were combined with either dry coolers or cooling towers for heat dissipation. We calculated water and carbon footprint indicators, primary energy demand and economic indicators by building a TRNSYS simulation model of the systems and applying it to 16 worldwide ASHRAE climate zones. In nearly all conditions, waste-heat recovery-based solutions were found to outperform both the baseline and the proposed free-cooling solution regarding energy demand and carbon footprint. When cooling towers were used, free cooling was a better option in terms water footprint in cold climates.

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A review of low-temperature heat recovery technologies for industry processes

Cited by 42 publications

References 167 publications

Energy Efficient Seawater Desalination: Strategies and Opportunities

Energy Efficient Seawater Desalination: Strategies and Opportunities

Multi-objective optimization of a novel reversible High-Temperature Heat Pump-Organic Rankine Cycle (HTHP-ORC) for industrial low-grade waste heat recovery

Carbon and Water Footprint of Energy Saving Options for the Air Conditioning of Electric Cabins at Industrial Sites

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