A study on the solar energy storing rock-bed to heat a polyethylene tunnel type greenhouse

Kürklü, Ahmet; Bilgin, Sefai; Özkan, Burhan

doi:10.1016/s0960-1481(02)00109-x

Cited by 53 publications

(16 citation statements)

References 12 publications

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“…Instead we focus on how the climatology of the PBL depth determines the magnitude of the temperature response to perturbations in Q. Several independent types of evidence exist that support the hypothesis that temperature anomalies of the PBL depend on the mixing within the layer: (a) the temperature sensitivity of deep and shallow layers to radiative forcing (Kurklu et al 2003); (b) temperature sensitivity to artificial enhancement of turbulence (by installation of a wind farm) in natural atmospheric conditions (Zhou et al 2012); (c) numerical experiments using climate models with different effective heat capacity (of the ocean mixed layer) show this reciprocal dependence of temperature trends upon effective heat capacity (Frame et al 2005, Meehl et al 2003.…”

Section: Introductionmentioning

confidence: 99%

Complementary explanation of temperature response in the lower atmosphere

Esau¹,

Davy²,

Outten³

2012

Environ. Res. Lett.

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There are a number of asymmetries in the surface air temperature response to forcing, including polar amplification and changes to the diurnal and seasonal temperature ranges. We propose that such spatial-temporal signatures of climate change can, in part, be explained by differences in the effective heat capacity of the atmosphere. We have demonstrated that predictions arising from this hypothesis are simultaneously satisfied through the analysis of temperature records from daily to inter-decadal timescales using observational and reanalysis datasets. This mechanism can help to explain why we see the largest temperature trends in the winter months (0.42 K/decade in winter compared to 0.18 K/decade in summer) and why the diurnal temperature range decreases in a warming world, having decreased by ∼0.4 K since 1950.

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Section: Introductionmentioning

confidence: 99%

Complementary explanation of temperature response in the lower atmosphere

Esau¹,

Davy²,

Outten³

2012

Environ. Res. Lett.

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“…Conversely, our system is less efficient than in using two channels filled with compact greenhouse rocks [12]. However, the drawbacks of the latter system are that it can be set up in a large volume tank containing a large amount of rock drum and fans consuming a lot of energy.…”

Section: Figure 9 Relative Humidity Variation Inside the Classic Grementioning

confidence: 97%

“…Solar thermal energy is stored as sensible heat, latent heat or a combination of both. Several works have been proposed in the literature describing greenhouse heating systems that use sensible heat storage such as water storage [11], rock-bed storage [12], ground storage [13], aquifer storage [14] and solar collectors [15].…”

Section: Introductionmentioning

confidence: 99%

Investigation and improvement for a solar greenhouse using sensible heat storage material

Bezari¹,

Bekkouche²,

Benchatti³

2021

FME Transactions

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Greenhouses need energy to create a suitable climate for crop production in winter period. Renewable energy seems to be the appropriate and sustainable energy source to heat greenhouses. The aim of this work is to investigate the possibilities of improving the inner greenhouse climate using sensible heat storage material. A comparative study was conducted upon experimental tests carried out between control and heated greenhouse in a semi-arid region. A new design of greenhouse was proposed that consists of an economical rock-bed with the sensible heat technique for heating system in an integrated H-shape channel. The excess diurnal heat captured by the greenhouse is stored into the system and then restored for nocturnal heating. The results obtained indicate that this thermal storage system is efficient and ameliorates the greenhouse climate. The night temperature was improved by 3.2 °C and the relative humidity was reduced by 9.6%, compared to a standard greenhouse.

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“…The rock-beds are, in different meaning, used to damp out the large fluctuations of air temperature occurred when air is heated by a solar air collector or to alter the phase relationship between the input and output temperature (Smith et al, 1984). The rock-bed system kept the inside air temperature higher than that of outside air at night, even in an overcast day following a clear day (Ahmet Kürklü, 2002). As the solar energy is intermittent, it needs to be stored in clear days to use the energy stored for heating at night (Bouhdjar et al, 1996 andWalton, et al, 1979).…”

Section: -1074 -mentioning

confidence: 99%

Utilization of Sas Language for Modeling the Rock Bed Performance

EL-Ghaffar

Ismail

Rashwan

2011

Misr Journal of Agricultural Engineering

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Heated air by solar collector has high variation in temperature because it is depend on time. Therefore, a rock-bed was used to regulate the air temperature and to damp out the large fluctuation of air temperature, although it causes a change in the phase and the amplitude temperature of the inlet air. The rock-bed could be used then to store day-heat for night use. The purpose of this paper was to mathematically model the rock-bed performance using SAS language. This modeling utilizes; (1) rock-bed characteristics, (2) Fourier series, and (3) statistical procedures for predicting the outlet air temperature. A computer program was developed to achieve this purpose. An air flow of 4.66 m 3 /min was used to test the computer model and air temperatures at 0, 0.375, and 0.70 m of the rock bed height were recorded by time for 24 h. It was found that Fourier series was more efficient for predicting the air temperature at any vertical location of the rock-bed. The correlation coefficient using the rock-bed characteristics and Fourier series was 0.905 for predicting the outlet air temperature. The determination coefficients were found to be above 0.98 between observed and predicted air temperatures at any vertical location of the rock-bed.

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A study on the solar energy storing rock-bed to heat a polyethylene tunnel type greenhouse

Cited by 53 publications

References 12 publications

Complementary explanation of temperature response in the lower atmosphere

Complementary explanation of temperature response in the lower atmosphere

Investigation and improvement for a solar greenhouse using sensible heat storage material

Utilization of Sas Language for Modeling the Rock Bed Performance

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