Theoretical and experimental study of the multistage dynamic dehumidifier for enhanced thermal comfort conditions in a building

IF 2.2 4区工程技术 Q2 CONSTRUCTION & BUILDING TECHNOLOGY Journal of Building Performance Simulation Pub Date : 2022-04-01 DOI:10.1080/19401493.2022.2056636

Sampath Suranjan Salins, S. Reddy, Shiva Kumar

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引用次数: 1

Abstract

In the present study, a mathematical model is constructed to simulate the heat and mass transfer process in a counterflow multistage reciprocating dehumidifier unit. Four packings are positioned at different positions where a camshaft mechanism controls their linear motion. Packings dip inside the Calcium Chloride desiccant instead of the conventional spray technique, improving the wettability and dehumidification effect. Theoretical and experimental results are compared. System performance is analyzed by varying the number of packing and performance parameters such as outlet temperature, specific humidity, moisture effectiveness, moisture removal rate, mass transfer coefficient and pressure change. Results indicated that the system gave maximum moisture effectiveness, moisture removal rate and mass transfer coefficient equal to 0.75, 2.21 g/s and 15.08 kg/m2−s. Stage-wise evaluation of the performance shows that there is a significant improvement in the dehumidification performance by the addition of multiple stages.

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多级动态除湿机提高建筑热舒适性的理论与实验研究

本文建立了一个数学模型来模拟逆流多级往复式除湿机组的传热传质过程。四个填料被放置在不同的位置，凸轮轴机构控制它们的直线运动。填料内浸氯化钙干燥剂代替传统的喷雾技术，提高了润湿性和除湿效果。对理论和实验结果进行了比较。通过改变填料数量和出口温度、比湿度、吸湿效率、除湿率、传质系数和压力变化等性能参数来分析系统性能。结果表明，该系统的湿效率最高，除湿率和传质系数分别为0.75、2.21 g/s和15.08 kg/m2−s。对性能的分级评估表明，通过增加多个阶段，除湿性能有显着改善。

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来源期刊

Journal of Building Performance Simulation CONSTRUCTION & BUILDING TECHNOLOGY-

CiteScore

5.50

自引率

12.00%

发文量

审稿时长

12 months

期刊介绍： The Journal of Building Performance Simulation (JBPS) aims to make a substantial and lasting contribution to the international building community by supporting our authors and the high-quality, original research they submit. The journal also offers a forum for original review papers and researched case studies We welcome building performance simulation contributions that explore the following topics related to buildings and communities: -Theoretical aspects related to modelling and simulating the physical processes (thermal, air flow, moisture, lighting, acoustics). -Theoretical aspects related to modelling and simulating conventional and innovative energy conversion, storage, distribution, and control systems. -Theoretical aspects related to occupants, weather data, and other boundary conditions. -Methods and algorithms for optimizing the performance of buildings and communities and the systems which service them, including interaction with the electrical grid. -Uncertainty, sensitivity analysis, and calibration. -Methods and algorithms for validating models and for verifying solution methods and tools. -Development and validation of controls-oriented models that are appropriate for model predictive control and/or automated fault detection and diagnostics. -Techniques for educating and training tool users. -Software development techniques and interoperability issues with direct applicability to building performance simulation. -Case studies involving the application of building performance simulation for any stage of the design, construction, commissioning, operation, or management of buildings and the systems which service them are welcomed if they include validation or aspects that make a novel contribution to the knowledge base.