Development and experimental evaluation of an innovative self-boosting energy recovery device for small-scale SWRO system

2020 ◽  
Vol 181 ◽  
pp. 28-37
Author(s):  
Junjie Tian ◽  
Yue Wang ◽  
Jie Zhou ◽  
Zhisong He ◽  
Shichang Xu
Keyword(s):  
Experimental Evaluation ◽  
Energy Recovery ◽  
Small Scale

scholarly journals Expansion of the Waste-Based Commodity Frontier: Insights from Sweden and Brazil

2020 ◽  
Vol 12 (7) ◽  
pp. 2628 ◽  
Author(s):  
Jutta Gutberlet ◽  
Torleif Bramryd ◽  
Michael Johansson
Keyword(s):  
Waste Management ◽  
Energy Recovery ◽  
Waste Incineration ◽  
Global South ◽  
Waste To Energy ◽  
Small Scale ◽  
Management Options ◽  
Sustainable Technologies ◽  
Slowing Down ◽  
The Impact

Waste is a valuable commodity and remains a livelihood source for waste pickers in the global South. Waste to Energy (WtoE) is often described as alternative to landfilling, as it provides cheap fuel while making waste disappear. In some European cities, this method has evolved into an impediment, slowing down the adoption of more sustainable technologies and waste prevention. These plants typically strain municipal budgets and provide fewer jobs than recycling and composting, thereby inhibiting the development of small-scale local recycling businesses. We applied the idea of ‘waste regime’ with an interdisciplinary and situated lens to provide insights to the following questions: How do different political developments in Brazil and Sweden, frame and reframe waste incineration and energy recovery, in the context of sustainability and waste management on local, regional and national levels? What forms of resistance against WtoE exist and what are the arguments of these protagonists? We evaluated the impact of WtoE and compare it with other waste management options with regard to CO2 balances and general environmental and social impacts. We conclude by suggesting more socially and environmentally appropriate ways of waste management, particularly for the context of global South cities.

scholarly journals Effectiveness of Fixed-Bed Regenerators for Energy Recovery in Buildings Applications

2020 ◽  
Vol 172 ◽  
pp. 09001
Author(s):  
Hadi Ramin ◽  
Easwaran N. Krishnan ◽  
Carey J. Simonson
Keyword(s):  
Energy Consumption ◽  
Energy Recovery ◽  
Fixed Bed ◽  
High Ratio ◽  
Test Facility ◽  
Small Scale ◽  
Outdoor Air ◽  
Considerable Portion ◽  
Consumption Energy ◽  
Scale Test

Energy consumption for ventilation purposes in buildings makes up a considerable portion of HVAC energy consumption. Energy recovery ventilators (ERVs) can reduce the required energy to pre-condition outdoor air in winter and summer seasons. Due to the high ratio of heat transfer area to volume, Fixed-Bed Regenerators (FBRs) can reach high effectiveness up to 90%. However, limited research studies are available for FBRs in HVAC applications. In this paper, a small-scale test facility is used to determine the sensible effectiveness of a FBR. Furthermore, a numerical model is proposed and validated against the experimental results from the small-scale test facility. The numerical results for latent effectiveness have been compared with available data in the literature and the comparison shows a satisfactory agreement between numerical and results from the literature.

scholarly journals Evaluation of Energy Recovery from Laboratory Experiments and Small-scale Field Tests of Underground Coal Gasification (UCG)

2015 ◽  
Vol 131 (5) ◽  
pp. 203-218 ◽  
Author(s):  
Faqiang SU ◽  
Ken-ichi ITAKURA ◽  
Gota DEGUCHI ◽  
Koutarou OHGA ◽  
Mamoru KAIHO
Keyword(s):  
Energy Recovery ◽  
Laboratory Experiments ◽  
Coal Gasification ◽  
Field Tests ◽  
Small Scale ◽  
Underground Coal Gasification ◽  
Scale Field

Economical and Environmental Aspects of the Microturbine’s Application in Brazil

2002 ◽  
Author(s):  
Eli Eber Batista Gomes ◽  
Vladimir Rafael Melian Cobas ◽  
Marco Antoˆnio Rosa do Nascimento ◽  
Electo Eduardo Silva Lora
Keyword(s):  
Natural Gas ◽  
Distributed Generation ◽  
Experimental Evaluation ◽  
Minas Gerais ◽  
Small Scale ◽  
Study Group ◽  
Environmental Aspects ◽  
Thermal Systems ◽  
The Future ◽  
The Cost

Microturbine generators have shown good perspectives for small scale distributed generation. In Brazil, the Thermal Systems Study Group of Federal School of Engineering of Itajuba´, sponsored by the CEMIG (Electrical Utility of Minas Gerais), is developing a project about experimental evaluation of microturbines systems. The objective of this paper is to evaluate the cost of generating electricity with microturbines and show the emissions range of microturbines operating with natural gas. The cost of the microturbine generators as well as the cost of the electricity and natural gas in Brazil at this moment and the projection for the future were considered.

scholarly journals The Development of a Decision Support Software for the Design of Micro-Hydropower Schemes Utilizing a Pump as Turbine

Proceedings ◽  
2018 ◽  
Vol 2 (11) ◽  
pp. 678 ◽  
Author(s):  
Daniele Novara ◽  
Aonghus McNabola
Keyword(s):  
Energy Recovery ◽  
Small Scale ◽  
Reverse Mode ◽  
Trade Offs ◽  
Visual Aid ◽  
In Series ◽  
Support Software ◽  
Water Pumps

Pumps As Turbines (PATs) are a class of unconventional hydraulic turbines consisting of standard water pumps working in reverse mode as the prime mover. Such devices can be well suited for either in-pipe energy recovery or small-scale hydropower, but their practical application is hampered by the lack of comprehensive guidelines able to assist the designer in the determination of the optimal plant layout and the choice of equipment. In fact, the performances of a PAT will depend on factors such as its construction type, its size and the flow conditions under which the machine is expected to operate. Ultimately, the design of a PAT-based hydro scheme is a matter of trade-offs which are in most cases not trivial. An innovative software was developed in order to assist hydro designers and provide a visual aid when choosing between different layouts of the analyzed hydro scheme (e.g., more than one PAT in series/parallel, different shaft speeds), and has been applied to a real case study of energy recovery in a water network.

scholarly journals Experiments in use of bentonite for energy recovery of used oils

2019 ◽  
Vol 112 ◽  
pp. 04009 ◽  
Author(s):  
Mihai Dragne ◽  
Elena Pop ◽  
Cristina Ileana Covaliu ◽  
Ecaterina Matei ◽  
Ionel Pîşă
Keyword(s):  
Oil Recovery ◽  
Energy Recovery ◽  
Energy Production ◽  
Combustion Process ◽  
Pollutant Emissions ◽  
Small Scale ◽  
Used Oil ◽  
Lower Heating Value ◽  
Polluting Emissions

The paper proposes the development of advanced, integrated technologies for materials with properties of adsorbents (e.g. bentonite), and the use of these material in processes of used oil recovery with remediation effect and energy recovery. The main objective is to replace diesel fuel, which is an expensive fuel, with revitalized oils for energy production. For these, laboratory experiments are required in two important directions. The first tests are related to the determination the optimum concentration of bentonite for removal of metals from used oil. The revitalization of the used oil leads to the protection of the combustion plant, to the increase of its lifetime and polluting emissions reduction. The second set of experiments relates to the determination of energy characteristics of used oil and revitalized used oil for energy production. Elemental analysis, lower heating value, viscosity, density and ash analysis were determined. Experimental test of combustion process on a small scale boiler has been done and the results shows an improved combustion process of revitalized oil compares with used oil and the decrease of the pollutant emissions.

Energy recovery from small-scale energy-from-waste (EfW) facility – Possible application in Hong Kong

2019 ◽  
Vol 26 (3) ◽  
pp. 97-104
Author(s):  
Cassie CHOW ◽  
Alex Wai Hung CHEUNG
Keyword(s):  
Hong Kong ◽  
Waste Management ◽  
Solid Waste ◽  
Energy Recovery ◽  
Solid Waste Management ◽  
Small Scale ◽  
Msw Management ◽  
Direct Combustion ◽  
Challenges And Opportunities ◽  
Waste Diversion

Solid waste management system is becoming a significant environmental, economic and technological challenge due to the increasing population and different waste stream. Municipal solid waste (MSW) is easy to generate but difficult to venerate. The question of whether MSW is an undervalued resource or an environmental burden is in continual debate. This paper presents an overview and structure of the current MSW management in Hong Kong and the advantages of waste diversion when the waste that normally would be delivered to the landfill is removed from the MSW. This paper also studies the technology of energy recovery which can be achieved from MSW in direct combustion as a fuel to produce power and heat, or indirectly, through waste conversion to fuel or fuel in a state of storage for future use. The necessity, rationale and application of energy recovery facilities are discussed to meet public health and environmental concerns and the public’s desire and willingness to reuse and recycle waste materials. Solid waste management serves both resource recovery and waste disposal in the public’s future challenges and opportunities for change.

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