Experimental analysis of the humidification of air in bubble columns for thermal water treatment systems

Eder, Elias; Preißinger, Markus

doi:10.1016/j.expthermflusci.2020.110063

Cited by 32 publications

(12 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The latter has greater effect in relative to the former as more effective dehumidifier allows higher water vapor condensation rate. The humidifier and dehumidifier can be configured in several ways including pack bed and bubble column towers, [65,66] which have large contact area and low thermal resistances. The influences of varying the operating conditions of these configurations such as pressure, air flow rate, water temperature on the humidification and dehumidification efficiency have also been well investigated.…”

Section: Humidification/dehumidificationmentioning

confidence: 99%

Energy Efficient Seawater Desalination: Strategies and Opportunities

2021

View full text Add to dashboard Cite

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.

show abstract

Section: Humidification/dehumidificationmentioning

confidence: 99%

Energy Efficient Seawater Desalination: Strategies and Opportunities

2021

View full text Add to dashboard Cite

show abstract

“…Eder and Preißinger 177 investigated experimentally the performance of the humidification process with the bubble column humidifier using optical access in the bubble column. By comparing the optical assessment with the measurement data of the experimental test, the optical assessment contributed greatly to a better clarification during the bubble humidification process.…”

Section: The Main Components Of Hdh Systemmentioning

confidence: 99%

Desalination process using humidification–dehumidification technique: A detailed review

et al. 2020

View full text Add to dashboard Cite

Summary The lack of fresh water resources is one of the important reasons obstructing progress all over the world. To overcome this crucial situation, the water desalination system (WDS) is progressed, enhanced, and modified. The desalination plant is mostly powered by nonrenewable energy resources, mainly by fossil fuels that make it an expensive and high‐energy‐consuming technology. Therefore, it is indispensable to depend on renewable energy supplies to drive desalination systems. Recently, the total thermal energy desired to operate the humidification–dehumidification desalination systems can be gained from renewable/sustainable energy resources such as geothermal energy and solar energy. Among the different desalination techniques, the HDH is considered one of the most effective desalination techniques to manage the critical issue of shortage of drinking water. The current paper presents a comprehensive review of diverse types of HDH desalination systems as well as their fundamental components. The present work revealed that the seawater HDH system is a promising technology to produce fresh water, particularly for decentralized demand. The packed bed humidifier is the most utilized type in the HDH water desalination system than other types of humidifiers. Furthermore, the direct dehumidifier enhances the performance of HDH desalination system compared to the indirect one. The present study concludes that the hybrid energy systems have the highest gain output ratio, while the thermal energy systems have the lowest gain output ratio. Water heating with solar energy has a significant enhancement in system productivity compared with solar air heating. The HDH WDS incorporated with heat pump achieves appropriate system productivity and gain output ratio with the lowest cost per liter.

show abstract

“…This finding shows that m a,1 accounts for a large proportion of the effect of the E dest , as in Equations. ( 8) and (11).…”

Section: Effect Of Operating Conditions On the Exergy Destructionmentioning

confidence: 99%

“…The following different types of humidifiers have been used: steam humidifiers [8], ultrasonic humidifiers [9], packed-bed humidifiers [10], bubble columns [11], and spray towers [12]. However, the above-mentioned techniques have common shortcomings.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Energy and Exergy Analysis of a Counter Hollow Fiber Membrane-based Humidifier

He¹,

Liang²

2020

IJEPE

View full text Add to dashboard Cite

The counter hollow fiber membrane-based humidifier is used for air humidification, which avoids the problem of liquid droplets carryover in traditional liquid humidification technology. In this study, an experimental rig was established for the hollow fiber membrane humidification system. The effects of air mass flow rate, air temperature, air relative humidity, water mass flow rate, water temperature on air humidity ratio increase, air temperature difference, power consumption per unit of humidification, humidification efficiency, energy efficiency, exergy destruction and exergy efficiency were experimentally investigated using the energy and exergy method. The results reveal the enhancement of the exergy efficiency with the increase in inlet air relative humidity, inlet air dry bulb temperature, air mass flow rate, and water mass flow rate. The results show that the humidification performance of the system is strongly influenced by the water temperature, while the humidification effect is more significant for the low temperature and low air humidity. It was found that as the relative humidity and dry bulb temperature of the air increased, the exergy destruction decreased significantly and the exergy efficiency increased. Increasing the air mass flow rate and water flow temperature resulted in an increase in both exergy destruction and exergy efficiency, while increasing the water flow rate had little effect on exergy destruction and fire efficiency. The exergy efficiency of the system ranged from 0.37 to 0.71. The maximum exergy destruction was 3.74 W, which occurred at air RH a,1 =30%, air temperature T a,1 =30°C, water temperature T w,1 =28°C, and air and water flow rates of 32 kg/h and 7 kg/h, respectively. The humidification efficiency of the system ranged from 0.712 to 0.925, and the power consumption per unit of humidification ranged from 0.94 g/(h•W) to 12.50 g/(h•W).

show abstract

Experimental analysis of the humidification of air in bubble columns for thermal water treatment systems

Cited by 32 publications

References 24 publications

Energy Efficient Seawater Desalination: Strategies and Opportunities

Energy Efficient Seawater Desalination: Strategies and Opportunities

Desalination process using humidification–dehumidification technique: A detailed review

Experimental Study on Energy and Exergy Analysis of a Counter Hollow Fiber Membrane-based Humidifier

Contact Info

Product

Resources

About