Technical Feasibility Study of Waste Heat Transportation System Using Phase Change Material from Industry to City

Kaizawa, Akihide; Kamano, Hiroomi; Kawai, Atsushi; Jozuka, Tetsuji; Senda, Takeshi; Maruoka, Nobuhiro; Okinaka, Noriyuki; Akiyama, Tomohiro

doi:10.2355/isijinternational.48.540

Cited by 63 publications

(28 citation statements)

References 10 publications

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“…For example, thermoelectric conversion for wall heat loss, [6][7][8][9] pre-heating of materials and steam generation for fluid sensible heat and radiation, etc. One of the attracting technologies is latent heat storage [10][11][12][13][14] that once stores thermal energy as latent heat of melting and then supplies it to the distant place with time-shift and flattened temperature level. Regarding the temperature level of the waste heat, high and middle temperature waste heats is able to be recovered fairly easily because the driving force in heat recovering process can be set high.…”

Section: Introductionmentioning

confidence: 99%

Development of Heat Exchanger with New Mechanism of Scraping Temperature Boundary Layer

2010

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Section: Introductionmentioning

confidence: 99%

Development of Heat Exchanger with New Mechanism of Scraping Temperature Boundary Layer

2010

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“…10) Therefore, a new technology is needed to utilize the LDG heat at over 1 273 K (1 000°C). We proposed a heat recovery system in which the waste heat intermittently emitted from the abovementioned processes was stored in the form of latent heat [10][11][12][13][20][21][22][23][24] and efficiently converted into chemical energy by an endothermic reaction 6,7,[10][11][12][13]20,21) such as the methane steam reforming reaction. From the viewpoint of energy cascade utilization, [4][5][6][7][8][9][10][11][12][13] it is important to use high temperature waste heat…”

Section: Introductionmentioning

confidence: 99%

Exergy Analysis of Methane Steam Reformer Utilizing Steelmaking Waste Heat

2010

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System analysis was conducted on a proposed combined system for methane steam reforming comprising conventional hydrogen production and waste heat recovery from steelmaking. Operating data for a conventional methane steam reforming system were collected and analyzed. The results showed that the conventional system utilized only 60 % of the natural gas as raw material and the rest is consumed for supplying the reaction heat for methane steam reforming. On the basis of this data, the proposed system was evaluated on five factors-natural gas consumption, enthalpy flow, CO 2 emission, cost, and exergy loss. For the proposed system, the factors were only 59.6 %, 59.7 %, 62.8 %, 86.5 %, and 65.8 % of those of the conventional system, respectively. This supports the feasibility of hydrogen production from recovered waste heat. Furthermore, the proposed system is expected to contribute to the production of 'green' hydrogen that incurs less CO 2 emission.

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“…These systems incorporate pipelines to transport chemical components. In contrast, there exists batch systems to carry phase change materials by truck vehicles [2], [3], [4]. It is possible to transfer thermal energy of different temperature levels of 50 °C or 100 °C by selecting appropriate PCM materials.…”

Section: Introductionmentioning

confidence: 99%

Simulation Analysis of Solution Transportation Absorption Chiller with the Capacity from 25 RT to 1000 RT

Enoki¹,

Watanabe²,

Tanaka³

et al. 2017

Preprint

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Utilization of wasted heat instead of fuel combustion is effective to reduce primary energy consumption for mitigating global warming problem. Because wasted heat sources are not necessarily located close to areas of heat demand, one of the difficulties is that wasted heat has to be transferred from heat source side to heat demand side, which may require heat transportation over long distance. From this point we proposed and have examined new idea of heat transportation using ammonia-water as the working fluid which system is named Solution Transportation Absorption chiller, in short STA. Our previous studies of STA were mainly the experimental investigation with STA facility which cooling power was 25RT (90kW). As a result, the COP of STA was found almost same value 0.65 with the conventional absorption chiller without depending on the transportation distances. The simulation using AspenHYSYS also examined with same experimental condition. The experimental data showed good agreement with the simulation calculation. In this study, we examined the large-scale cooling power STA on simulation. The examination cooling powers were from 90 kW (25RT) to 3517 kW (1000RT). All cooling power achieved around COP 0.64 including pump power consumptions. In addition, we performed the dynamic simulation. As the results, there was no effect of pipeline size on the cooling capacities and mass flow rates. Furthermore, the stability time of the cooling capacities and mass flow rates were almost same regardless of the pipeline size and cooling capacity. In other words, STA may be achieved the same COP even though having various complex conditions compared with the conventional absorption chiller.

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Technical Feasibility Study of Waste Heat Transportation System Using Phase Change Material from Industry to City

Abstract: Fig. 5.Energy requirement, exergy loss and CO 2 emission for producing cold water of 1 GJ at 7°C for the heat supplying methods in cases 3-1 and 3-2.

Cited by 63 publications

References 10 publications

Development of Heat Exchanger with New Mechanism of Scraping Temperature Boundary Layer

Development of Heat Exchanger with New Mechanism of Scraping Temperature Boundary Layer

Exergy Analysis of Methane Steam Reformer Utilizing Steelmaking Waste Heat

Simulation Analysis of Solution Transportation Absorption Chiller with the Capacity from 25 RT to 1000 RT

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