Effect of membrane selectivity and partial pressure on vapor removal and sensible heat recovery in membrane processes

This study experimentally investigates the effect of internal condensation on the performance of a heat recovery ventilator. Experiments were performed using a plate-type sensible heat exchanger element that was designed for very humid and dusty environments such as chicken broiler houses. The results of these experiments show that the temperature efficiency considering condensation is always greater than that without considering latent heat. As outdoor temperature decreases or indoor relative humidity increases, temperature efficiency increases owing to an increase in the rate of condensation. The present polypropylene-based sensible heat exchanger element could be a solution for harsh environments because it can discharge condensate water by gravity and is resistant to moisture and other toxic gases.

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Possibility of Slag Sensible Heat Recovery on Drum-like Installations

KnE Materials Science ◽

10.18502/kms.v6i1.8148 ◽

2020 ◽

Author(s):

Yu.V. Sorokin ◽

B.L. Demin ◽

L.A. Smirnov ◽

Ye.N. Shcherbakov

Keyword(s):

High Temperature ◽

Heat Recovery ◽

Heat Content ◽

Sensible Heat ◽

Energy Characteristics ◽

Working Bodies ◽

Physical Heat

A variant of utilizing of slag physical heat in drum-like installations has been considered. A high-temperature melt is delivered to movable metal bodies. Heat is picked up from the working bodies surface and newly generated surfaces of slag due to interaction with working bodies. Surface of slag grains, as they cool down, allows to pick up heat with various energy characteristics. Keywords: smelter slags, heat content, drum-like installations, picking up and utilization of heat with various energy characteristics

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Energy Recovery from an Industrial Clothes Dryer Using a Condensing Heat Exchanger

10.32920/ryerson.14664927 ◽

2021 ◽

Author(s):

Yousuf Farooq

Keyword(s):

Heat Transfer ◽

Mass Transfer ◽

Heat Exchanger ◽

Heat Recovery ◽

Cold Water ◽

Waste Heat ◽

Interface Temperature ◽

Sensible Heat ◽

Clothes Dryer ◽

Condensing Heat Exchanger

The aim of this project was to design a condensing heat exchanger to recover waste heat from an industrial clothes dryer. Industrial cloth dryers are inefficient in their use of energy because almost all of the energy input in the dryer is wasted in the atmosphere, and thus there is great potential for heat recovery. This energy can be used to preheat the incoming cold water, and the conventional heater can then heat the water to a final temperature. The warm moist air from the dryer carries both sensible and latent heat, and in order to design this heat recovery condensing heat exchanger, the heat transfer by both mass and sensible heat has to be accounted for. The basis of this heat and mass transfer problem was the energy balance at the interface, and separate models for the calculation of latent and sensible heat transfer were used. The mass transfer coefficients were obtained from an analogy with heat transfer, and the unknown interface temperature was solved for iteratively. The data for this design was collected from a 20 kW dryer, and the heat recovery from that dryer was observed to be about 17.3%. This heat recovery condensing heat exchanger efficiency can be enhanced by the addition of more coils to the heat exchanger. An improvement in the overall results can be expected if a practical study is done on the condensation heat exchanger for an industrial cloth dryer.

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Rapid thermal swing adsorption process in multi-beds scale with sensible heat recovery for continuous energy-efficient CO2 capture

Chemical Engineering Journal ◽

10.1016/j.cej.2019.123656 ◽

2020 ◽

Vol 392 ◽

pp. 123656 ◽

Cited By ~ 1

Author(s):

Wonho Jung ◽

Sunghyun Park ◽

Kwang Soon Lee ◽

Jae-Deok Jeon ◽

Hyung Keun Lee ◽

...

Keyword(s):

Co2 Capture ◽

Energy Efficient ◽

Heat Recovery ◽

Adsorption Process ◽

Sensible Heat ◽

Continuous Energy ◽

Thermal Swing Adsorption

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Study on Energy Saving of the Air-Conditioning Exhaust Heat Recovery System in Office Buildings

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.775.44 ◽

2015 ◽

Vol 775 ◽

pp. 44-49

Author(s):

Yan Zou

Keyword(s):

Thermal Performance ◽

Heat Recovery ◽

Sensible Heat ◽

Humid Climate ◽

Beijing Area ◽

Heat Efficiency ◽

Exhaust Heat ◽

Recovery System ◽

Heat Recovery System ◽

Hot Humid Climate

The study analyzed the thermal performance of a sensible heat recovery system in an office building in Beijing area. Based on proposing the basic evaluation index of the thermal performance, the study analyzed the effect of outdoor temperature and wind speed on the heat recovery efficiency and the reduction of fresh air load. The analysis results show that, the operation effect of the sensible heat recovery device in winter is better. In winter, the sensible heat efficiency η is higher than 60%, the system has higher EER, and the fresh air load can be reduced more than 50%. While the sensible heat efficiency η is lower than 60% in most time in summer. And in a hot, humid climate, the recovery effect of sensible heat recovery device is significantly reduced.

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Feasibility Study for the System of Coal Gasification by Molten Blast Furnace Slag

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.97-101.2347 ◽

2010 ◽

Vol 97-101 ◽

pp. 2347-2351 ◽

Cited By ~ 6

Author(s):

Peng Li ◽

Qin Qin ◽

Qing Bo Yu ◽

Wen Ya Du

Keyword(s):

Blast Furnace ◽

Blast Furnace Slag ◽

Heat Recovery ◽

Coal Gasification ◽

Hot Water ◽

Environmental Benefits ◽

Sensible Heat ◽

Recovery System ◽

Heat Recovery System ◽

Furnace Slag

At present, molten blast furnace slag is quenched rapidly using a large amount of water to produce a glassy-granulated slag without any recovery of its much sensible heat, polluting water and atmosphere. To solve these problems, a new heat recovery system is proposed. This system consists of melting gasifier, the 2nd gasifier and boiler in order to achieve stepped energy using. The melting gasifier and the 2nd gasifier use the endothermic heat of gasification reaction instead of sensible heat to recover the energy of molten blast furnace slag. The possibility of the new heat recovery system is studied. The reactions in melting gasifier are studied using STA409PC thermal analyzer and HSC chemistry software. The economic and environmental benefits are calculated based on the heat and mass balances. The results indicate that this method is possible and better than conventional methods such as hot water or steam production. The molten BF slag acts as not only thermal media but also good catalyst. The efficiency of melting gasifier is high and without pollution. Besides, this method can bring huge economic and environmental benefits which are important to the survival and sustainable development of iron-steel enterprises.

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Analysis of the Impact of Boiler Slag’s Physical Sensible Heat Recovery on the Thermal Economy of Thermal Power Plant

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.608-609.1298 ◽

2012 ◽

Vol 608-609 ◽

pp. 1298-1301

Author(s):

Yong Li ◽

Shi Ming Xu ◽

Sheng Wen Huang ◽

Wu Yi Du

Keyword(s):

Power Plant ◽

Heat Balance ◽

Heat Recovery ◽

Power Plants ◽

Thermal Power ◽

Sensible Heat ◽

Whole Plant ◽

Before And After ◽

The Impact ◽

The Heat Balance

Based on the situation that the transformations of the technology which is used to reclaim the physical sensible heat of the boiler slag in some industrial captive power plants, it has been used the heat balance method and the equivalent heat drop method to calculate and analyze the thermal economic indicators before and after the transformations of the unit, and then reveal the mechanism of the impact of the boiler slag’s physical sensible heat on the thermal economy of the whole plant.

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