Experimental and simulation studies on two stage humidification–dehumidification desalination and cooling plant

Chiranjeevi, C.; Srinivas, T.

doi:10.1016/j.desal.2015.08.006

Cited by 67 publications

(2 citation statements)

References 12 publications

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“…And they achieve 2.8–6.5 kg/h water yield in the hybrid HDH system and 4.2 coefficient of performance in the VCR with varying airflow rate, inlet temperature, and humidity ratio. Chirangeevi and Srinivas 11 proposed and experimented on an integrated HDH‐VAR system to generate freshwater and significantly increase the cooling effect. A concentric tube heat exchanger is used as an air preheater, dehumidifier, and condenser in the integrated HDH‐VAR unit.…”

Section: Introductionmentioning

confidence: 99%

Design and simulation of water‐cooled dehumidifier for HDH desalination plant

Shaik

Srinivas

2022

Heat Trans

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Condensers are widely used in thermal applications to transfer the maximum heat between the working fluids and change the phase of vapor. In basic thermal‐based humidification–dehumidification (HDH) desalination, a condenser is used as a water‐cooled dehumidifier for improving freshwater production within the minimum area. In this thermal‐based HDH system, desalinated water production is the major output. The simulation tool is used to analyze the thermohydraulic performance of a water‐cooled dehumidifier. In this thermohydraulic analysis, variables, like, airflow rate, tube diameter, and longitudinal pitch are thoroughly investigated to identify the optimum parameters for improving the performance of the water‐cooled dehumidifier. The obtained results indicate that the heat transfer area and performance index are increased when the airflow rate and tube diameter change. But at 8 and 10 mm tube diameter, the surface area and performance index are contradictory in nature while longitudinal pitch varies from 30 to 45 mm. At 12.5 mm tube diameter, surface area and performance index decrease gradually but the certain period of pitch limit performance increases markedly. In addition, the yield of HDH desalination has been investigated. When the mass flow rate changed from 100 to 500 kg/h, it was 0.667–3.32 L/h.

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Section: Introductionmentioning

confidence: 99%

Design and simulation of water‐cooled dehumidifier for HDH desalination plant

Shaik

Srinivas

2022

Heat Trans

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“…Because of urbanization and rising water demands brought on by population growth, the level of groundwater is now declining. Given that the Indian coast is relatively long both east and west, desalination plants have a lot of potential and space for expansion [2]. Around 750 million people worldwide lack access to clean drinking water [3].…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of a Photovoltaic-Thermal Collector Coupled Stepped Solar Still for Indian Climatic Conditions

Narang

Roy

Kataray

et al. 2022

Modelling and Simulation in Engineering

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Freshwater scarcity is increasing across many parts of the globe; to meet this demand, seawater desalination is the best choice, and the electrical energy consumption is escalating due to urbanization and industrialization. Sustainable production of electricity and freshwater can be met by an integrating photovoltaic-thermal (PVT) module with stepped solar still (SSS). The present study focuses on the theoretical modeling of the PVT-SSS desalination system for evaluating thermal efficiency, energy efficiency, freshwater productivity, and electrical power generation. The solar still productivity will be influenced by the depth of water, insulation thickness, glass cover material, thickness and inclination, and operational factors like preheating the input water supply and water salinity. A comparative analysis has been made of summer, winter, and rainy climatic conditions of Vellore town (12.9165° N, 79.1325° E), Tamil Nadu. In the present work, a thermodynamic model based on mass and energy balance is developed for the PVT-SSS system, and it is solved by a numerical method. A Runge-Kutta technique of 4th order is employed using a Python program for solving the thermodynamic simulation model. The results from the model depict that for summer, winter, and rainy climatic seasons, the freshwater productivity of PV/T-SSS was determined to be 12.18 kg/m2day, 6.67 kg/m2day, and 2.77 kg/m2day. Also, it is found that electrical efficiency for summer, winter, and rainy seasons is 8.91%, 9.135%, and 9.53%, respectively. A maximum and minimum freshwater production of 1668 kg/m2 and 1218 kg/m2 are observed for a depth of 2 cm and 5 cm, respectively.

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Desalination process using humidification–dehumidification technique: A detailed review

et al. 2020

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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.

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Experimental and simulation studies on two stage humidification–dehumidification desalination and cooling plant

Cited by 67 publications

References 12 publications

Design and simulation of water‐cooled dehumidifier for HDH desalination plant

Design and simulation of water‐cooled dehumidifier for HDH desalination plant

Performance Evaluation of a Photovoltaic-Thermal Collector Coupled Stepped Solar Still for Indian Climatic Conditions

Desalination process using humidification–dehumidification technique: A detailed review

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