State-of-the-Art Technologies on Low-Grade Heat Recovery and Utilization in Industry

Ling‐Chin, Janie; Bao, Huashan; Ma, Zhiwei; Taylor, W.; Roskilly, Anthony Paul

doi:10.5772/intechopen.78701

Cited by 28 publications

(19 citation statements)

References 47 publications

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“…In addition to being a well-known reactant (already used in some commercial refrigeration machines), it shows low equilibrium temperatures, which offers a large expansion stage between points 3 and 3' (due to the large gap between LTE and HTE curves, see Figs. [2][3][4][5].…”

Section: Methodology and Performance Criteriamentioning

confidence: 99%

“…The thermodynamic states of the fluid at each point of the cycle are computed according to the transformations described in Sections 2.2 and 2.3 (and in Figs. [2][3][4][5]. Once the thermodynamic path is determined, energy-related quantities (supplied and released heat, mechanical work produced) are computed, using the following energy balance equations:…”

Section: Modelmentioning

confidence: 99%

“…Roskilly et al [2] recently identified several systems as promising means of improving thermal energy management in industry, buildings and transport sectors. Focusing on energy resources, Ling-Chin et al [3] estimated the temperature ranges of various industrial low-grade waste heat sources (e.g. petrochemical, iron, paper, cement and food sectors).…”

Section: Introduction and State-of-the-art Reviewmentioning

confidence: 99%

“…However, hybrid cycles involving a solid/gas sorption process (adsorption or thermochemical) run in discontinuous-mode operation (as the solid adsorbent or reactant is usually implemented in a fixed-bed vessel) and so can address this storage issue. Among them, systems based on a solid/gas thermochemical process have been far less investigated, although their energy storage densities can reach more than 500 kWh/m 3 [9]. The following state-of-the-art review focuses on such hybrid thermochemical cycles using ammonia as reactive gas, as it offers a wide variety of available solid reactants, and thus a wide range of feasible temperature and pressure conditions.…”

Section: Introduction and State-of-the-art Reviewmentioning

confidence: 99%

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Novel hybrid thermochemical cycles for low-grade heat storage and autothermal power generation: A thermodynamic study

2020

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The principle of hybridizing a solid/gas thermochemical refrigeration cycle with a power cycle is extended to two novel hybrid cycles (called operating modes). They can be driven by low-grade heat, and they allow storing this energy and converting it predominantly into mechanical power. For this purpose, they integrate an original autothermal power production during their discharging step, which is deeply analyzed. In addition, depending on the operating mode, power can be produced in both charging and discharging steps and an additional cold production can be provided. A deep thermodynamic study was carried out to assess the performance of these cycles, for 103 solid/gas pairs. These cycles allow converting low-grade heat sources from 87 °C to 250 °C. The maximal energy and exergy efficiencies for power and cold cogeneration are 0.24 and 0.40, respectively, and the maximal exergy density is 722 kJ/kgNH3. The part of power production reaches 62% (when it occurs only in discharging step) to 78% (when it occurs in both steps).

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Section: Methodology and Performance Criteriamentioning

confidence: 99%

Section: Modelmentioning

confidence: 99%

Section: Introduction and State-of-the-art Reviewmentioning

confidence: 99%

Section: Introduction and State-of-the-art Reviewmentioning

confidence: 99%

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Novel hybrid thermochemical cycles for low-grade heat storage and autothermal power generation: A thermodynamic study

2020

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“…For its performance, CS needs two kinds of energy input: (I) Electrical energy to cover process requirements (pumping, vacuum, sensing, and control system) and (II) low-grade thermal energy to run the distillation process. The technology can also use a low-grade waste heat source from industry [22,23]. Concerning electrical energy, the electrical demand for the water desalination processes can be supplied with renewable energy (RE) as photovoltaic panels (PV) without the need for a battery, which represents an innovative route in solar powering desalination systems.…”

Section: Cool Steam Technologymentioning

confidence: 99%

Cool Steam Method for Desalinating Seawater

Arnau

Navarro

Soraluce³

et al. 2019

Water

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Cool steam is an innovative distillation technology based on low-temperature thermal distillation (LTTD), which allows obtaining fresh water from non-safe water sources with substantially low energy consumption. LTTD consists of distilling at low temperatures by lowering the working pressure and making the most of low-grade heat sources (either natural or artificial) to evaporate water and then condensate it at a cooler heat sink. To perform the process, an external heat source is needed that provides the latent heat of evaporation and a temperature gradient to maintain the distillation cycle. Depending on the available temperature gradient, several stages can be implemented, leading to a multi-stage device. The cool steam device can thus be single or multi-stage, being raw water fed to every stage from the top and evaporated in contact with the warmer surface within the said stage. Acting as a heat carrier, the water vapor travels to the cooler surface and condensates in contact with it. The latent heat of condensation is then conducted through the conductive wall to the next stage. Net heat flux is then established from the heat source until the heat sink, allowing distilling water inside every parallel stage.

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Thermodynamic Cycles

2021

Waste Heat Recovery in Process Industries

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State-of-the-Art Technologies on Low-Grade Heat Recovery and Utilization in Industry

Cited by 28 publications

References 47 publications

Novel hybrid thermochemical cycles for low-grade heat storage and autothermal power generation: A thermodynamic study

Novel hybrid thermochemical cycles for low-grade heat storage and autothermal power generation: A thermodynamic study

Cool Steam Method for Desalinating Seawater

Thermodynamic Cycles

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