Experimental study on development of thermal conditions in ground beneath a greenhouse

Nawalany, Grzegorz; Bieda, W.; Radoń, Jan; Herbut, Piotr

doi:10.1016/j.enbuild.2013.10.020

Cited by 20 publications

(20 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The appropriate temperature in soil will allow a further reduction of the greenhouse energy demand. The share of heat exchange with soil is only 5% of the total heat exchange through all envelopes (Nawalany et al, 2014). It should be emphasized that despite a seemingly small share in the greenhouse energy management, the soil plays an important part in the development of thermal conditions in the growing zone.…”

Section: Resultsmentioning

confidence: 99%

“…Modern greenhouses should meet these requirements, hence their design and equipment is continuously being improved (Esen and Yuksel, 2013;Vadiee and Martin, 2013;Kurpaska, 2008;Papadopoulos and Hao, 1997). However, there are still some potential in terms of microclimate improvement in the growing zone, among other things obtaining the appropriate heat exchange with soil (Fox et al, 2019;Boughanmi et al, 2018;Nawalany et al, 2017Nawalany et al, , 2014Kurpaska et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

“…However, it is the winter when the role of soil in developing the thermal conditions inside the greenhouse increases. The soil heated up in the summer gives up the heat to the inside of the greenhouse which positively affects the limitation of sudden air temperature fluctuations in the growing zone (Nawalany et al, 2014(Nawalany et al, , 2017a.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Impact of Selected Technical Soil Parameters on the Greenhouse Energy Management

Nawalany¹,

Sokołowski²

2019

J. Ecol. Eng.

Self Cite

View full text Add to dashboard Cite

The paper is an attempt to determine the impact of soil type and its selected technical parameters on the heat exchange with soil. The test results were based on the all-year-round experimental measurements of soil temperature and indoor and outdoor air in a greenhouse located in southern Poland. The field tests results were used to validate the calculation model using the WUFIplus software. The validation showed a high degree of conformity between the experiments and calculations. Five variants were used in the calculations, differentiated by technical parameters of the soil underneath the greenhouse. The results showed a significant impact of the soil type on the greenhouse energy management.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Impact of Selected Technical Soil Parameters on the Greenhouse Energy Management

Nawalany¹,

Sokołowski²

2019

J. Ecol. Eng.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Much of the prior work regarding ground heat transfer has been performed for buildings [1][2][3] whereas only a few studies have been performed for greenhouses. Most of the research for greenhouses ground heat transfer consists of case studies [4][5][6] or the potential for design improvements such as ground-source heat exchangers [7,8]. Various levels of modeling resolution have been employed for representing the thermally massive ground.…”

Section: Introductionmentioning

confidence: 99%

Energy and Economic Analysis for Greenhouse Ground Insulation Design

Bambara

Athienitis

2018

Energies

View full text Add to dashboard Cite

Energy and life cycle cost analysis were employed to identify the most-cost effective ground envelope design for a greenhouse that employs supplemental lighting located in Ottawa, Ontario, Canada (45.4 • N). The envelope design alternatives that were investigated consist of installing insulation vertically around the perimeter and horizontally beneath the footprint of a greenhouse with a concrete slab and unfinished soil floor. Detailed thermal interaction between the greenhouse and the ground surface is achieved by considering 3-dimensional conduction heat transfer within the TRNSYS 17.2 simulation software. The portion of total heat loss that occurred through the ground was approximately 4% and permutations in ground insulation design reduced heating energy consumption by up to 1%. For the two floor designs, the highest net savings was achieved when perimeter and floor zone horizontal insulation was installed whereas a financial loss occurred when it was also placed beneath the crop zone. However, in all cases, the improvement in economic performance was small (net savings below $4000 and reduction in life cycle under 0.2%). Combined energy and life cycle cost analysis is valuable for selecting optimal envelope designs that are capable of lowering energy consumption, improving economics and enhancing greenhouse durability.Energies 2018, 11, 3218 2 of 15 transfer in greenhouses used the WUFI software to compare thermal energy use for a greenhouse located above, below and at ground level [13]. However, these studies did not consider economic implications of employing ground insulation. To determine the most cost-effective design, a combined energy and economic analysis must be performed. To our best knowledge, there has not been any previously published work regarding the detailed 3D energy analysis and economic analysis for the design of a greenhouse floor envelope.The aim of this paper is to demonstrate how integrated thermal-daylight energy analysis and life cycle cost analysis (LCCA) can be employed to identify the most-cost effective ground insulation design for a greenhouse that controls light to a consistent daily integral located in Ottawa, Ontario, Canada (45.4 • N, mid-latitude, 4560 heating degree-days).

show abstract

“…The renewable energy directive [4] set the target for 2020 at 20% for the whole EU. Poland in 2005 used approximately 7% of energy from renewable energy sources.…”

mentioning

confidence: 99%

Residual Woody Waste Biomass as an Energy Source – Case Study

Woch

Hernik

Wyrozumska

et al. 2015

Pol. J. Environ. Stud.

View full text Add to dashboard Cite

Renewable energy sources are considered to be an important part of Polish strategy for energy security in case of exhaustion of conventional energy sources. Energy security should be understood as sustainable development of renewable energy sources, and providing such security is one of the strategic tasks of the Polish government. Efficient energy management should provide energy not only for the current generation but also for future ones, and minimize the negative impact on the environment [1].Currently, the potential for renewable energy in Poland is not fully used, therefore there is a need to support obtaining energy from renewable sources, which positively impacts the environment and creates jobs. Renewable energy sources can also be perceived as a backup in case of a failure in conventional energy supply.Supporting the development of renewable energy sources has been an important goal of European Union policy [2]. In 1997 the white paper "Energy for the Future: Renewable Sources of Energy" was published. It set a 12% goal for the share of renewable energy in the gross inland energy consumption that should be achieved by 2010 [3]. But by 2010 the target was not met and energy Pol. J. Environ. Stud. Vol. 24, No. 1 (2015), [355][356][357][358] AbstractThe aim of our study was to determine the potential of forest woody waste biomass as a source of renewable energy. The research is a case study of one forest division in Poland.The research was made in Staszów Forest Division, Świętokrzyskie Voivodeship, eastern Poland. The division is part of the Regional State Forest Directorate in Radom and covers a forest area of 19,335.12 ha. The research covers thinning and felling of forests, and was based on the forest management plan for 2012-21 and its inventory data. During the research basic features of forest stands, such as diameter and volume of aboveground, tree parts were determined. The annual growth of a timber stand in [m 3 /ha year] and the average age of the stand were analyzed to estimate the amount of obtained wood and biomass for energy generation.The amount of wood waste that could be used to generate energy is 12,269 t annually both from harvest cutting and intermediate cutting, and additionally 7,267 t/year from wood processing. The energy that could be generated from this amount of woody biomass would allow for electrical power for 14,866 people and heating 3,153 one-family houses for a year. Therefore we claim that the energy obtained from the forest of an area of average rural community meets the needs of half of its inhabitants.

show abstract

Experimental study on development of thermal conditions in ground beneath a greenhouse

Cited by 20 publications

References 10 publications

Impact of Selected Technical Soil Parameters on the Greenhouse Energy Management

Impact of Selected Technical Soil Parameters on the Greenhouse Energy Management

Energy and Economic Analysis for Greenhouse Ground Insulation Design

Residual Woody Waste Biomass as an Energy Source – Case Study

Contact Info

Product

Resources

About