Analysis of Low-Grade Heat Driven Ethanol-Silica Gel Adsorption Chiller

2021 ◽  
pp. 101125
Author(s):  
Rami HABASH ◽  
Gamze GEDIZ ILIS ◽  
Hasan DEMIR ◽  
Hakan F. ÖZTOP
Keyword(s):  
Silica Gel ◽  
Low Grade ◽  
Adsorption Chiller ◽  
Low Grade Heat

scholarly journals Numerical Simulation of Advanced Adsorption Refrigeration Chiller with Mass Recovery

1970 ◽  
Vol 3 (2) ◽  
pp. 59-67 ◽  
Author(s):  
MZI Khan ◽  
S Sultana ◽  
A Akisawa ◽  
T Kashiwagi
Keyword(s):  
Silica Gel ◽  
Operating Conditions ◽  
Cooling Power ◽  
Inlet Temperature ◽  
Low Grade ◽  
Outlet Temperature ◽  
Adsorption Chiller ◽  
Cycle Simulation ◽  
Chilled Water ◽  
Mass Recovery

This paper investigates the thermodynamic framework of a three-bed advanced adsorption chiller, where the mass recovery scheme has been utilized such that the performances of this chiller could be improved and a CFC-free-based sorption chiller driven by the low-grade waste heat or any renewable energy source can be developed for the next generation of refrigeration. Silica gel-water is chosen as adsorbent-refrigerant pair. The three-bed adsorption chiller comprises with three sorption elements (SEs), one evaporator and one condenser. The configuration of SE1 and SE2 are identical, but the configuration of SE3 is taken as half of SE1 or SE2. Mass recovery process occurs between SE3 with either SE1 or SE2 and no mass recovery between SE1 and SE2 occurs. The mathematical model shown herein is solved numerically. In the present numerical solution, the heat source temperature variation is taken from 50 to 90ºC along with coolant inlet temperature at 30ºC and the chilled water inlet temperature at 14ºC. A cycle simulation computer program is constructed to analyze the influence of operating conditions (hot and cooling water temperature) on COP (coefficient of performance), SCP (specific cooling power), η (chiller efficiency) and chilled water outlet temperature. Keywords: Adsorption; COP; SCP; Mass recovery; Silica gel-waterDOI: 10.3329/jname.v3i2.920 Journal of Naval Architecture and Marine Engineering 3(2006) 59-67 

Performance Study of Waste Heat Driven Pressurized Adsorption Chiller

2013 ◽  
Vol 315 ◽  
pp. 380-384
Author(s):  
Khairul Habib
Keyword(s):  
Heat Source ◽  
Waste Heat ◽  
Cooling Capacity ◽  
Coefficient Of Performance ◽  
Low Grade ◽  
Performance Study ◽  
Adsorption Chiller ◽  
And Performance ◽  
Low Grade Heat ◽  
Adsorption Desorption

This article presents a transient modeling and performance of a waste heat driven pressurized adsorption chiller. This innovative adsorption chiller employs pitch based activated carbon of type Maxsorb III as adsorbent and R507A as refrigerant as adsorbent-refrigerant pair. This chiller utilizes low-grade heat source to power the cycle. A parametric study has been presented where the effects of adsorption/desorption cycle time, switching time and regeneration temperature on the performance are reported in terms of cooling capacity and coefficient of performance (COP). Results indicate that the adsorption chiller is feasible even when low-temperature heat source is available.

Experimental research on novel adsorption chiller driven by low grade heat source

2007 ◽  
Vol 48 (8) ◽  
pp. 2375-2381 ◽  
Author(s):  
D.C. Wang ◽  
Z.X. Shi ◽  
Q.R. Yang ◽  
X.L. Tian ◽  
J.C. Zhang ◽  
...  
Keyword(s):  
Heat Source ◽  
Experimental Research ◽  
Low Grade ◽  
Adsorption Chiller ◽  
Low Grade Heat

scholarly journals The influence of adsorption chillers on CHP power plants

2018 ◽  
Vol 240 ◽  
pp. 05033 ◽  
Author(s):  
Karol Sztekler ◽  
Wojciech Kalawa ◽  
Sebastian Stefański ◽  
Jarosław Krzywanski ◽  
Karolina Grabowska ◽  
...  
Keyword(s):  
Power Plant ◽  
Power Plants ◽  
Industrial Process ◽  
Primary Energy ◽  
Simulation Software ◽  
Low Grade ◽  
Adsorption Chiller ◽  
Absorption Chillers ◽  
Low Grade Heat ◽  
Heat Power Plant

The simultaneous production of electricity, heat and cooling, the so-called trigeneration, allows for substantial savings in the chemical energy of fuels. More efficient use of the primary energy contained in fuels translates into tangible earnings for power plants while reductions in the amounts of fuel burned, and of non-renewable resources in particular, certainly have a favourable impact on the natural environment. The main aim of the above-described project was to analyse the influence of use adsorption contacted to conventional CHP power plant. An adsorption chiller is an item of industrial equipment that is driven by low grade heat and intended to produce chilled water and desalinated water. Adsorption chillers ACH can by used for utilization heat from many industrial process where temperature medium is too low for use absorption chillers. In this article modelled the cycle of a conventional heat power plant integrated with an adsorption chiller-based plant. Multi-variant simulation calculations were performed using IPSEpro simulation software.

Development and comparison of two-bed silica gel–water adsorption chillers driven by low-grade heat source

2009 ◽  
Vol 48 (5) ◽  
pp. 1017-1025 ◽  
Author(s):  
Z.Z. Xia ◽  
R.Z. Wang ◽  
D.C. Wang ◽  
Y.L. Liu ◽  
J.Y. Wu ◽  
...  
Keyword(s):  
Heat Source ◽  
Silica Gel ◽  
Water Adsorption ◽  
Low Grade ◽  
Low Grade Heat

scholarly journals The Design and Test for Degradation of Energy Density of a Silica Gel-Based Energy Storage System Using Low Grade Heat for Desorption Phase

Energies ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 4513
Author(s):  
Emmanuel Nyarko Ayisi ◽  
Karel Fraňa
Keyword(s):  
Energy Storage ◽  
Silica Gel ◽  
Storage System ◽  
Energy Storage System ◽  
Low Grade ◽  
Storage Density ◽  
Time Period ◽  
Number Of Cycles ◽  
Short Time ◽  
Low Grade Heat

This paper presents the design and a short cycle repeatability test of a silica gel-based thermal energy storage system using low grade heat for the desorption phase. The system was designed to test the degradation in the energy storage density of the adsorbent material for a 2 h working period in a short number of cycles (5 cycles). Low grade heat of 70 °C is used for regeneration during the desorption phase in each cycle. It was found that a reduction of 1.6 W/kg per each cycle of energy storage was observed, up to 5 cycles. The maximal heat storage density was 292 kJ/kg at the first cycle and reduced to 225 kJ/kg at the fifth cycle. Furthermore, the total amount of water vapor adsorbed in the silica gel was observed as well. The test of energy storage was performed under a short time period (maximal approx. 165 min).

Silica Gel + Water Adsorber Chiller and Desalination System: A Transient Heat Transfer Study

2016 ◽  
Vol 8 (2) ◽  
Author(s):  
Sourav Mitra ◽  
Kandadai Srinivasan ◽  
Pramod Kumar ◽  
Pradip Dutta
Keyword(s):  
Silica Gel ◽  
Low Cost ◽  
Low Grade ◽  
Flash Evaporation ◽  
Two Stage ◽  
Thermal Compression ◽  
Kinetics Of Adsorption ◽  
Ambient Temperatures ◽  
Thermal Desalination ◽  
Low Grade Heat

The present work describes a silica gel + water adsorption-based desalination and chiller system, an emerging low cost process of integrating thermal desalination and cooling by utilizing low-grade heat. The cycle employs a combination of flash evaporation and thermal compression of steam in single/two stage to generate the dual effect. The current study aims at simulating a four-bed/stage adsorption system using energy and mass balance along with kinetics of adsorption. The performance of single- and two-stage adsorption systems is compared for ambient temperatures in the range of 25–45 °C and a constant heat source temperature of 85 °C.

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