scholarly journals Development and Testing of Novel Applications for Adsorption Heat Pumps and Chillers

Energies ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 615
Author(s):  
Xavier Jobard ◽  
Pierryves Padey ◽  
Martin Guillaume ◽  
Alexis Duret ◽  
Daniel Pahud
Keyword(s):  
Energy Efficiency ◽  
Industrial Waste ◽  
Waste Heat ◽  
District Heating ◽  
Heat Pumps ◽  
Adsorption Heat ◽  
Simplified Model ◽  
Heating And Cooling ◽  
Adsorption Heat Pump ◽  
Industrial Waste Heat

This work aims at the development and the experimental characterization of new applications for adsorption heat pumps and chillers driven by industrial waste heat or renewable sources that can provide heating and/or cooling. Adsorption technologies offer the advantage of providing heating and cooling from low temperature sources below 100 °C without using refrigerant with high Global Warming Potential and with very low electricity consumption. Therefore, the technology enables the use of large untapped heat sources, increasing the energy efficiency of the heating and cooling sector with very limited impact on the environment. Several applications were investigated numerically for Switzerland using a simplified model of an adsorption heat pump. Four scenarios were identified as interesting: (1) the valorization of low-grade industrial waste heat in district heating networks, (2) energy efficiency improvement of district heating substations, (3) an autonomous adsorption heat pump with a wood pellets burner and (4) cooling applications. These scenarios were experimentally validated with a laboratory test of a commercial silica gel/water machine. Results show that there is a gap of up to 40% between the prediction of the simplified model and the experimental results. Therefore, there is huge potential to improve the performances of this commercial unit for these applications.

Feasibility limits of using low-grade industrial waste heat in symbiotic district heating and cooling networks

2020 ◽  
Vol 22 (6) ◽  
pp. 1339-1357 ◽  
Author(s):  
Maurizio Santin ◽  
Damiana Chinese ◽  
Alessandra De Angelis ◽  
Markus Biberacher
Keyword(s):  
Industrial Waste ◽  
Waste Heat ◽  
District Heating ◽  
Low Grade ◽  
Heating And Cooling ◽  
Industrial Waste Heat

scholarly journals A Framework for Design and Operation Optimization for Utilizing Low-Grade Industrial Waste Heat in District Heating and Cooling

Energies ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 2190
Author(s):  
Lingwei Zhang ◽  
Yufei Wang ◽  
Xiao Feng
Keyword(s):  
Industrial Waste ◽  
Energy Demand ◽  
Heat Recovery ◽  
Waste Heat ◽  
District Heating ◽  
Mixed Integer ◽  
Low Grade ◽  
Operation Optimization ◽  
Heating And Cooling ◽  
Industrial Waste Heat

In the process industry, a large amount of low-grade waste heat is discharged into the environment. Furthermore, district heating and cooling systems require considerable low-grade energy. The integration of the two systems has great significance for energy saving. Because the energy demand of consumers varies in periods, the design and operation of an industrial waste heat recovery system need to match with the fluctuations of district energy demand. However, the impact of the periodic changes on the integration schemes are not considered enough in existing research. In this study, a framework method for solving above problem is proposed. Industrial waste heat was integrated with a district heating and cooling system through a heat recovery loop. A three-step mathematical programming method was used in design and operation optimization for multiperiod integration. A case study was conducted, and the results show that the multiperiod optimization method can bring significant benefits to the system. By solving the mixed integer nonlinear programming model, the optimal operation plans of the integration in different periods can be obtained.

scholarly journals Novel District Heating Systems: Methods and Simulation Results

Energies ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4450
Author(s):  
David Huber ◽  
Viktoria Illyés ◽  
Veronika Turewicz ◽  
Gregor Götzl ◽  
Andreas Hammer ◽  
...  
Keyword(s):  
Thermal Energy ◽  
Industrial Waste ◽  
Waste Heat ◽  
District Heating ◽  
Hot Water ◽  
Space Heating ◽  
Low Grade ◽  
Domestic Hot Water ◽  
Heating And Cooling ◽  
Industrial Waste Heat

Fifth-generation district heating and cooling (5th DHC) systems offer promising approaches to decarbonizing space heating, cooling and domestic hot water supply. By using these systems, clustered buildings combined with industrial waste heat can achieve a net-zero energy balance on a variety of time scales. Thanks to the low exergy approach, these systems are highly efficient. As part of the Smart Anergy Quarter Baden (SANBA) project, the thermal energy grid simulation tool TEGSim has been further developed and used to design an ultra-low-temperature district heating (ULTDH) network with hydraulic and thermal components fitted to the specific regional characteristics of the investigated case. Borehole thermal energy storage (BTES) used as seasonal storage ensures long-term feasibility. The annual discrepancy of input of thermal energy provided by space cooling and output of energy demanded by space heating and domestic hot water is supplied by an external low-grade industrial waste heat source. This paper presents the functionality of the simulation and shows how to interpret the findings concerning the design of all components and their interplay, energy consumption and efficiencies.

Use of the Linear Driving Force Approximation in Adsorption Heat Pump and Chiller Modeling

2009 ◽  
Author(s):  
Alex Raymond ◽  
Srinivas Garimella
Keyword(s):  
Mass Transfer ◽  
Driving Force ◽  
Waste Heat ◽  
Heat Pumps ◽  
Adsorption Heat ◽  
Activated Carbon Fiber ◽  
Fickian Diffusion ◽  
Half Cycle ◽  
Linear Driving Force ◽  
Adsorption Heat Pump

Adsorption heat pumps and chillers can utilize solar or waste heat to provide space conditioning, process heating or cooling, or energy storage. In these devices, accurate modeling of intraparticle adsorbate mass transfer is an important part of predicting overall performance. The linear driving force (LDF) approximation is often used for modeling intraparticle mass transfer in place of the more detailed Fickian diffusion (FD) equation for its computational simplicity. This paper directly compares the adsorbate contents predicted by the conventional LDF approximation, an empirical LDF approximation proposed by El-Sharkawy et al. [1], and the FD equations for cylindrical adsorbent fibers such as activated carbon fiber (ACF). The conditions under which the LDFs agree with the FD equation are then evaluated. It is shown that for a given working pair, agreement between the LDF and FD equations is affected by the diffusivity, particle radius, half-cycle time, initial adsorbate content, and equilibrium adsorbate content. The maximum possible error in adsorbate content predicted by the LDF approximation compared with the FD solution is then calculated for the ACF (A-20)-ethanol working pair. Although the maximum error will be different for other cases, the technique used in this paper can be reproduced to determine the greatest possible LDF error for any working pair.

Industrial waste heat utilization for low temperature district heating

Energy Policy ◽  
2013 ◽  
Vol 62 ◽  
pp. 236-246 ◽  
Author(s):  
Hao Fang ◽  
Jianjun Xia ◽  
Kan Zhu ◽  
Yingbo Su ◽  
Yi Jiang
Keyword(s):  
Low Temperature ◽  
Industrial Waste ◽  
Waste Heat ◽  
District Heating ◽  
Heat Utilization ◽  
Waste Heat Utilization ◽  
Industrial Waste Heat
Sign in / Sign up

Export Citation Format

Share Document