Design and Concept of an Energy System Based on Renewable Sources for Greenhouse Sustainable Agriculture

Așchilean, Ioan; Răsoi, Gabriel; Răboaca, Maria Simona; Filote, Constantin; Culcer, Mihai

doi:10.3390/en11051201

Cited by 35 publications

(23 citation statements)

References 54 publications

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“…There are some well-known pathways for plastic wastes recycling and reintroduction into the industrial cycle, but the feasible option of disposal through energy recovery seems an effective alternative [2]. The energy recovery from wastes, including plastics, or the design and concept of energy systems based on renewable sources [3,4], would represent modern ways of efficient fossil fuel consumption, preservation and resources sustainability for Romania. Pyrolysis is an irreversible process of chemically decomposition of organic materials at high temperatures, in the absence of oxygen.…”

mentioning

confidence: 99%

From Plastic to Fuel - New Challenges

Constantinescu¹,

Bucura²,

Ionete³

et al. 2019

Mat.Plast.

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The increased demand for energy sources is the driving force to convert organic compounds into alternative fuels. Plastic waste disposal affects the environment, since they are not easily recycled and, during the recycling process, they can produce waste ash, heavy metals, or potentially harmful gas emissions. In the plant design for plastic converting into fuel, the chemical reactor is one of the advanced equipment in the field of chemical and process engineering. This study emphasizes the feasibility of pyrolysis process for valorisation plastics by producing energy-efficient products. In this respect, samples of polypropylene, polyethylene and polystyrene were used as models and subjected to pyrolysis processes at 450 �C, in the presence of two types of mesoporous silica materials, MCM-41 and SBA-15, using a modern developed reactor. The use of mesoporous materials increased the calorific value of the obtained oil and gas, thus improving the economic potential of the process end products. This study dealt with the extraction of oil from plastics termed as plastic pyrolysis oil (PPO) and plastics pyrolysis gas (PPG), with a composition rich in different types of hydrocarbons and they can be marketed at much cheaper rates compared to that present in the market.

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mentioning

confidence: 99%

From Plastic to Fuel - New Challenges

Constantinescu¹,

Bucura²,

Ionete³

et al. 2019

Mat.Plast.

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“…This analysis includes fuel cell assemblies of various types, namely proton exchange membrane fuel cells, solid oxide fuel cells, phosphoric acid fuel cells and molten carbon fuel cells, having dimensions of power generation systems with generated power ranging from 5 kW up to 2.8 MW, and the equipment has nominal powers ranging from 0.5 kW up to 400 kW [20,21]. Fuel cell systems are used in stationary applications [59][60][61][62][63] where they can be used for various purposes, namely as back-up power supplies, power generation for remote locations, stand-alone power stations for one or more consumers, distributed generation for buildings and cogeneration (in which excess thermal energy resulting from the production of electricity is used to provide the thermal agent) [24,40].…”

Section: Practical Applications Of the Fuel Cellmentioning

confidence: 99%

Hydrogen Fuel Cell Technology for the Sustainable Future of Stationary Applications

et al. 2019

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The climate changes that are becoming visible today are a challenge for the global research community. The stationary applications sector is one of the most important energy consumers. Harnessing the potential of renewable energy worldwide is currently being considered to find alternatives for obtaining energy by using technologies that offer maximum efficiency and minimum pollution. In this context, new energy generation technologies are needed to both generate low carbon emissions, as well as identifying, planning and implementing the directions for harnessing the potential of renewable energy sources. Hydrogen fuel cell technology represents one of the alternative solutions for future clean energy systems. This article reviews the specific characteristics of hydrogen energy, which recommends it as a clean energy to power stationary applications. The aim of review was to provide an overview of the sustainability elements and the potential of using hydrogen as an alternative energy source for stationary applications, and for identifying the possibilities of increasing the share of hydrogen energy in stationary applications, respectively. As a study method was applied a SWOT analysis, following which a series of strategies that could be adopted in order to increase the degree of use of hydrogen energy as an alternative to the classical energy for stationary applications were recommended. The SWOT analysis conducted in the present study highlights that the implementation of the hydrogen economy depends decisively on the following main factors: legislative framework, energy decision makers, information and interest from the end beneficiaries, potential investors, and existence of specialists in this field.

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“…In this paper, we have designed, tested, and optimized the starting, operating, and stopping sequences of a Tedom-modified Stirling alpha V191 engine, representing the conversion unit of the Sunflower 35 solar concentrator [27], through an automation system. In the laboratory, we designed the electrical installation and the automation system, we implemented practically the automation system [28,29], and we programmed the PLCs in order to realize the starting sequences and the opening of the valves for both the cooling system of the compressor and the charging system with helium. The automation also provides the protection and alarm system, control of the protection curtain, and command and control of the electric generator, the heat exchanger, and fan control for the Stirling engine.…”

Section: Introductionmentioning

confidence: 99%

PLC Automation and Control Strategy in a Stirling Solar Power System

et al. 2020

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The Stirling engine together with a solar concentrator represents a solution for increasing energy efficiency. Thus, within the National Research and Development Institute for Cryogenic and Isotopic Technologies, an automation system was designed and implemented in order to control the processes inside the solar conversion unit using a programmable logic controller from Schneider Electric. The acquired parameters from the installed sensors were monitored using Unity Pro L software. The main objective of this paper is to solve the starting, operating, and shut-down sequences in safe conditions, as well as monitor the working parameters.

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Design and Concept of an Energy System Based on Renewable Sources for Greenhouse Sustainable Agriculture

Cited by 35 publications

References 54 publications

From Plastic to Fuel - New Challenges

From Plastic to Fuel - New Challenges

Hydrogen Fuel Cell Technology for the Sustainable Future of Stationary Applications

PLC Automation and Control Strategy in a Stirling Solar Power System

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