Brewer’s spent grains as biofuels in combustion-based energy recovery processes: Evaluation of thermo-oxidative decomposition

Fuel ◽  
2022 ◽  
Vol 312 ◽  
pp. 122955
Author(s):  
O. Gil-Castell ◽  
N. Mascia ◽  
C. Primaz ◽  
F. Vásqez-Garay ◽  
M.G. Baschetti ◽  
...  
Keyword(s):  
Energy Recovery ◽  
Oxidative Decomposition ◽  
Recovery Processes ◽  
Spent Grains

Performance Improvement of Membrane Energy Exchanger using Ultrasound for HVAC Application

2021 ◽  
pp. 1-29
Author(s):  
Gurubalan Annadurai ◽  
Maiya M.P. ◽  
Patrick Geoghegan ◽  
Carey Simonson
Keyword(s):  
Air Conditioning ◽  
Energy Recovery ◽  
Mass Transfer Process ◽  
Porous Membrane ◽  
Air Conditioning System ◽  
Energy Saving Potential ◽  
Recovery Processes ◽  
Additional Resistance ◽  
Membrane Energy ◽  
Ac Systems

Abstract Air conditioning (AC) systems consume the maximum proportion of the total electricity used in the building sector. The demand of AC systems is expected to increase exponentially in the coming years due to various reasons such as climate change, increasing affordability and increase in living floor space. Membrane-based liquid desiccant AC system along with energy recovery ventilating equipment is considered as a prospective alternative to the conventional air conditioning system (CACS) and has the potential to meet the increasing current and future AC demand in a sustainable manner. Its efficiency and energy saving potential with respect to CACS depends on the performance of the membrane-based dehumidifier, regenerator and energy recovery ventilating equipment which are commonly referred to as membrane energy exchangers (MEEs). MEE is an indirect exchanger type in which the working streams are separated by a porous membrane. This intermediate membrane creates an additional resistance for the heat and mass transfer process in the MEE. To reduce the resistance, this study experimentally and numerically investigates the influence of ultrasound on the performance of the MEE for dehumidification, humidification (applicable for membrane-based evaporative cooling and desiccant regeneration devices) and energy recovery processes. It is found that the vibration due to ultrasound has the potential to improve the effectiveness of the MEE by 55% in the dehumidification process and by 65% in the humidification and energy recovery processes.

Energy Recovery Methods in Adsorption Refrigeration Units

2017 ◽  
Author(s):  
Andrzej Grzebielec ◽  
Adam Szelągowski ◽  
Adam Ruciński
Keyword(s):  
Energy Loss ◽  
Thermal Wave ◽  
Energy Recovery ◽  
Type Systems ◽  
Adsorption Refrigeration ◽  
Wave Type ◽  
Recovery Processes ◽  
Refrigeration Unit ◽  
The One ◽  
Heat And Mass Recovery

Adsorption refrigeration systems, as opposed to absorption type operate in a cyclic manner. The result is that at the beginning of each process must be fed into the adsorber state in which they will adsorb or desorb a refrigerant. In the case of two adsorbers at the start of a cycle, the one of the adsorber must be refrigerated while the second has to be heated. These processes are causing unnecessary energy loss. The aim of the work is to show how these processes can be connected and the heat received from one adsorber is transported to another adsorber. As part of the study, the heat and mass recovery processes will be considered. It turns out that in the thermal wave type systems, it is possible to recover more than 25% of the energy lost to bring the adsorber to the states in which they will operate efficiently to desorb and adsorb refrigerant. That is, it is possible to improve the efficiency of the adsorption refrigeration unit using the proposed improvements.

Waste Composition in the Northeast U.S.: Implications for Resource Recovery

2010 ◽  
Author(s):  
Mark Bobman ◽  
John Culbertson
Keyword(s):  
Energy Recovery ◽  
Composition Studies ◽  
Resource Recovery ◽  
Limited Attention ◽  
Composition Analysis ◽  
Material Recovery ◽  
Waste Composition ◽  
Recovery Processes ◽  
Spending Patterns ◽  
Meaningful Data

Waste composition studies can provide meaningful data for design and operation of resource recovery processes. However, relatively limited attention has been devoted to energy recovery predicted by waste composition analysis, despite increasingly detailed analysis of various subsets of the municipal solid waste stream. Further, global economic conditions and markets have dramatically altered since 2008, resulting in significant changes in corporate, institutional and consumer spending patterns. Associated with these shifts in spending, as well as with longer-term trends in packaging and advances in residential and commercial recycling, the quantity and makeup of discarded materials has changed. The authors present data resulting from recent waste composition studies, and discuss potential impacts on the design and operation of material recovery systems.

scholarly journals A Review of Sludge-to-Energy Recovery Methods

Energies ◽  
2018 ◽  
Vol 12 (1) ◽  
pp. 60 ◽  
Author(s):  
Jumoke Oladejo ◽  
Kaiqi Shi ◽  
Xiang Luo ◽  
Gang Yang ◽  
Tao Wu
Keyword(s):  
Sewage Sludge ◽  
Energy Recovery ◽  
Recovery Process ◽  
Metal Pollutants ◽  
Recovery Processes ◽  
Recent Developments ◽  
Cost Competitiveness ◽  
Treatment Facilities ◽  
Heavy Metal Pollutants ◽  
The Impact

The increasing volume of sewage sludge from wastewater treatment facilities is becoming a prominent concern globally. The disposal of this sludge is particularly challenging and poses severe environmental hazards due to the high content of organic, toxic and heavy metal pollutants among its constituents. This study presents a simple review of four sewage to energy recovery routes (anaerobic digestion, combustion, pyrolysis and gasification) with emphasis on recent developments in research, as well as benefits and limitations of the technology for ensuring cost and environmentally viable sewage to energy pathway. This study focusses on the review of various commercially viable sludge conversion processes and technologies used for energy recovery from sewage sludge. This was done via in-depth process descriptions gathered from literatures and simplified schematic depiction of such energy recovery processes when utilised for sludge. Specifically, the impact of fuel properties and its effect on the recovery process were discussed to indicate the current challenges and recent scientific research undertaken to resolve these challenges and improve the operational, environmental and cost competitiveness of these technologies.

scholarly journals MANAGING THE ENVIRONMENTAL HAZARDS OF WASTE TIRES

2016 ◽  
Vol 20 (4) ◽  
Author(s):  
SANA KORDOGHLI ◽  
MARIA PARASCHIV ◽  
RADU KUNCSER ◽  
MOHAND TAZEROUT ◽  
MALINA PRISECARU ◽  
...  
Keyword(s):  
Thermogravimetric Analysis ◽  
Energy Recovery ◽  
Experimental Approach ◽  
Environmental Hazards ◽  
Scrap Tires ◽  
Toxic Compounds ◽  
Organic Matters ◽  
Recovery Processes ◽  
Harmful Emissions ◽  
Scale Reactor

<p>This paper presents an experimental approach on understanding and managing the environmental hazards of co-products resulted during energy recovery processes applied on scrap tires. As tire combustion faces serious problems related to harmful emissions, pyrolysis appear as a process that allow the management of toxic compounds.</p><p>Thus, for the reactions that occur during pyrolysis and combustion of tires organic matters the main intensive degradation thermal ranges have been established. The work was carried out by coupling thermogravimetric analysis (TGA) of tire samples with bench scale reactor in order to identify the relationships between thermochemical behaviour and products distribution. </p>

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