scholarly journals The impact of filling level resolved: Capillary-assisted evaporation of water for adsorption heat pumps

2016 ◽  
Vol 102 ◽  
pp. 513-519 ◽  
Author(s):  
Franz Lanzerath ◽  
Jan Seiler ◽  
Meltem Erdogan ◽  
Heike Schreiber ◽  
Matthias Steinhilber ◽  
...  
Energies ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1958
Author(s):  
Andreas Velte ◽  
Jörg Weise ◽  
Eric Laurenz ◽  
Joachim Baumeister ◽  
Gerrit Füldner

In adsorption heat pumps, the adsorbent is typically combined with heat conducting structures in order to ensure high power output. A new approach for the direct integration of zeolite granules into a copper structure made of short copper fibers is presented here. Zeolite NaY granules with two different grain sizes are coated with copper fibers and powder and sintered to larger structures. The sorption dynamics of these structures were measured and evaluated in terms of heat and mass transfer resistances and compared to the loose grain configuration of the same material. We found that the thermal conductivity of such a composite structure is approximately 10 times higher than the thermal conductivity of an adsorbent bed with NaY granules. Sorption equilibrium measurements with a volumetric method indicate that the maximum uptake is not altered by the manufacturing process. Furthermore, the impact of the adsorbent–metal structure on the total thermal mass of an adsorption heat exchanger is evaluated. The price of the superior thermal conductivity is a 40% higher thermal mass of the adsorption heat exchanger compared to the loose grain configuration.


Energies ◽  
2020 ◽  
Vol 13 (5) ◽  
pp. 1150 ◽  
Author(s):  
Kyle R. Gluesenkamp ◽  
Andrea Frazzica ◽  
Andreas Velte ◽  
Steven Metcalf ◽  
Zhiyao Yang ◽  
...  

The thermal masses of components influence the performance of many adsorption heat pump systems. However, typically when experimental adsorption systems are reported, data on thermal mass are missing or incomplete. This work provides original measurements of the thermal masses for experimental sorption heat exchanger hardware. Much of this hardware was previously reported in the literature, but without detailed thermal mass data. The data reported in this work are the first values reported in the literature to thoroughly account for all thermal masses, including heat transfer fluid. The impact of thermal mass on system performance is also discussed, with detailed calculation left for future work. The degree to which heat transfer fluid contributes to overall effective thermal mass is also discussed, with detailed calculation left for future work. This work provides a framework for future reporting of experimental thermal masses. The utilization of this framework will enrich the data available for model validation and provide a more thorough accounting of adsorption heat pumps.


Author(s):  
Marina Bonomolo ◽  
Mariano Giuseppe Ippolito ◽  
Giuliana Leone ◽  
Rossano Musca ◽  
Vincenzo Porgi ◽  
...  

2021 ◽  
Vol 6 ◽  
pp. 100086
Author(s):  
Mujib L. Palash ◽  
Tahmid Hasan Rupam ◽  
Animesh Pal ◽  
Anutosh Chakraborty ◽  
Bidyut Baran Saha ◽  
...  

2021 ◽  
Vol 154 ◽  
pp. 106193
Author(s):  
Davide Palamara ◽  
Paolo Bruzzaniti ◽  
Luigi Calabrese ◽  
Edoardo Proverbio

2021 ◽  
pp. 133365
Author(s):  
Marc Scherle ◽  
Timothy A. Nowak ◽  
Stefan Welzel ◽  
Bastian J.M. Etzold ◽  
Ulrich Nieken

Author(s):  
Praveen Cheekatamarla ◽  
Vishaldeep Sharma ◽  
Bo Shen

Abstract Economic and population growth is leading to increased energy demand across all sectors – buildings, transportation, and industry. Adoption of new energy consumers such as electric vehicles could further increase this growth. Sensible utilization of clean renewable energy resources is necessary to sustain this growth. Thermal needs in a building pose a significant challenge to the energy infrastructure. Supporting the current and future building thermal energy needs to offset the total electric demand while lowering the carbon footprint and enhancing the grid flexibility is presented in this study. Performance assessment of heat pumps, renewable energy, non-fossil fuel-based cogeneration systems, and their hybrid configurations was conducted. The impact of design configuration, coefficient of performance (COP), electric grid's primary energy efficiency on the key attributes of total carbon footprint, life cycle costs, operational energy savings, and site-specific primary energy efficiency are analyzed and discussed in detail.


2020 ◽  
Vol 44 (7) ◽  
pp. 5895-5904
Author(s):  
Yanshu Luo ◽  
Bingqiong Tan ◽  
Xianghui Liang ◽  
Shuangfeng Wang ◽  
Xuenong Gao ◽  
...  

Sign in / Sign up

Export Citation Format

Share Document