Combined cooling heating and power systems in greenhouses. Grassroots and retrofit design

Tataraki, Kalliopi; Kavvadias, Konstantinos; Maroulis, Z.B.

doi:10.1016/j.energy.2019.116283

Cited by 17 publications

(18 citation statements)

References 36 publications

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“…They stated that excess clean energy, including solar electricity, could be utilized in agriculture reducing environmental pollution and improving energy efficiency. Tataraki, et al [24], have studied the use of CHP systems for covering the energy needs in greenhouses. The authors stated that the combined use of a cooling, heating and electricity generation system with a gas boiler for heating is profitable for tomato cultivation.…”

Section: Applications Of Distributed Electricity Generation Technologmentioning

confidence: 99%

Application of Distributed Electricity Generation Systems in Agricultural Greenhouses

Vourdoubas¹

2020

JAC

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Use of distributed electricity generation systems is currently increasing due to their economic and environmental benefits. Agricultural greenhouses require heat and electricity for covering their energy needs while their annual energy requirements vary significantly. Aim of the current work is the investigation of applying various distributed electricity generation systems in greenhouses. A review of different distributed generation systems currently used in various sectors as well as in greenhouses has been implemented. Various technologies are examined utilizing either renewable energies or fossil fuels in very efficient energy systems. Most of them are mature and cost-effective having lower environmental impacts compared with traditional centralized electricity generation technologies. Their use in greenhouses results in many benefits including the creation of an additional income for the farmer, reduction of carbon emissions into the atmosphere and increasing stability of the electric grid. It is suggested that distributed electricity generation systems should be used more in greenhouses when the necessary conditions are favorable.

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Section: Applications Of Distributed Electricity Generation Technologmentioning

confidence: 99%

Application of Distributed Electricity Generation Systems in Agricultural Greenhouses

Vourdoubas¹

2020

JAC

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“…Cases of solar energy [7,8], geothermal energy [9], and biomass [10] have already been discussed. Combined heat and power (CHP) systems have also been examined and implemented in different countries [11,12]. CHP when combined with an absorption chiller can efficiently provide useful cooling.…”

Section: Introductionmentioning

confidence: 99%

“…CHP when combined with an absorption chiller can efficiently provide useful cooling. Such systems can further reduce the productivity problems of facilities affected by hot summer climates by extending their overall operating periods [12].…”

Section: Introductionmentioning

confidence: 99%

“…Greenhouses have been widely researched in terms of energy use [13][14][15][16][17][18][19], and multiple studies have performed economic analyses of agricultural production [12,20,21]. The key issue in the relevant research is the determination of the required energy input per area (MWh per ha), and the area production cost (cost per ha).…”

Section: Introductionmentioning

confidence: 99%

“…The results indicate that, in both cases, investing in cogeneration for greenhouse applications has positive Net Present Values (NPVs), but to a different extent between the two products. Similarly, Tataraki et al [12] proved that cogeneration is a cost-effective technology for greenhouses, and concluded that for the case of Greece, the simultaneous use of a heat-driven absorption chiller (combined cooling heat and power (CCHP)) during the summer season increases the operating period of the greenhouse, and enhances both annual productivity and profits. Of the two examined products (tomato and cucumber), it was pointed out that cucumber has a smaller accepted cultivation range than tomato, resulting in a significantly higher thermal demand and, consequently, production cost.…”

Section: Introductionmentioning

confidence: 99%

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Cogeneration Economics for Greenhouses in Europe

et al. 2020

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Cogeneration is a cost-effective technology, and modern greenhouses are considered one of the best applications for it due to their energy intensity. Taking into account that in such cases the production cost is significantly affected by the cost of energy, the potential of combined heat and power (CHP) has already been examined and proved in practice in some European countries, with the Netherlands being the most representative example. In this study, a comparative investigation of the greenhouse energy cost in all European countries is presented through the use of a combined cooling heat and power (CCHP) system. Using actual historical data spanning a decade, a total overview of the European level is given regarding greenhouse thermal requirements and CCHP energy costs for the cultivation of products with an accepted temperature cultivation range 20 ± 5 °C. By consulting (a) the available daily historical meteorological data for the 2008–2018 period, (b) the recorded actual electricity and natural gas prices for the 2008–2018 period, and (c) the technical characteristics of the CCHP system, the annual heating and cooling requirements of greenhouses are determined for all EU countries. Assuming a cogeneration unit with an internal combustion engine (ICE) as a prime mover, as well as a single-effect absorption chiller for the production of useful cooling, the unitary cost of energy is estimated along with the annual cost for heating and cooling per unit cultivation area. Using this methodology, the economic efficiency of cogeneration in greenhouses is assessed for the selected 10-year period, allowing the identification of the countries that benefit the most from this technology. The results indicate that the spark ratio (e.g., the electricity to natural gas price ratio) is the most crucial parameter for greenhouse costs. For countries where the ratio is larger than 3, greenhouses can even result in an extra cashflow instead of energy expenditures. The most favorable conditions for cogeneration use were found in Italy and the United Kingdom with an average spark ratio more than 4, resulting in an annual total cost of heating energy close to −7 €/m2 per year. On the other hand, cogeneration proved not to be a cost-efficient system in Sweden and Finland as a result of significantly high greenhouse energy requirements.

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Greenhouse heating by energy transfer between greenhouses: System design and implementation

Sun

Wei²,

Zhou³

et al. 2022

Applied Energy

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Combined cooling heating and power systems in greenhouses. Grassroots and retrofit design

Cited by 17 publications

References 36 publications

Application of Distributed Electricity Generation Systems in Agricultural Greenhouses

Application of Distributed Electricity Generation Systems in Agricultural Greenhouses

Cogeneration Economics for Greenhouses in Europe

Greenhouse heating by energy transfer between greenhouses: System design and implementation

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