Impact of the water evaporation on the heat and moisture transfer in a high-temperature underground roadway

Xu, Yu; Li, Rongrong; Jia, Mintao; Wang, Qiaoli; Chen, Yin; Cai, Rongzi; Han, Ziqing

doi:10.1016/j.csite.2021.101551

Cited by 28 publications

(9 citation statements)

References 34 publications

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“…The presence of wind greatly affects the rate of evaporation [36, ]. The evaporation process will occur more quickly when the water vapor above the water surface is carried by the wind, causing the air humidity above the water surface to decrease [38,39].…”

Section: Physical Parametersmentioning

confidence: 99%

Evaporation Rate Analysis Of Raw Water In Salt Production Using a Prototype At Salt House

Nuzula,

Masruroh,

Kartika

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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In Indonesia, the famous method of the salt production process is evaporation using solar energy. The important aspect of this method is the evaporation rate. The evaporation rate is nearly related to the physical conditions of the surrounding environment. The aim of this study is to determine the evaporation rate of raw water in the production process using a prototype and determine the effect of physical parameters on the rate of evaporation of raw water in the production process in the salt house. The causal method with a quantity approach was used in this research. The results obtained are the total evaporation rate on the prototype at the Salt House is 1.68 litters/day and the results of Spearman rank correlation show that luminous intensity, air temperature, and wind speed have a significant impact on the evaporation rate because the significant value is <0.005 while the humidity level is not s significant effect.

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Section: Physical Parametersmentioning

confidence: 99%

Evaporation Rate Analysis Of Raw Water In Salt Production Using a Prototype At Salt House

Nuzula,

Masruroh,

Kartika

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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“…Wall conditions: The solid wall surface adopts noslip boundary conditions [6]. In the near-wall region of the flow field wall function that is to use the logarithmic distribution to solve the standard function method of turbulent viscosity coefficients for processing.…”

Section: Source Terms and Boundary Conditionsmentioning

confidence: 99%

Study on the Influence of Moisture Dissipation on the Thermal and Humidity Environment in the Turbine Floor of Underground Pumped Storage Hydropower Plants

et al. 2022

E3S Web Conf.

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The turbine floor of the main plant is an important part in an underground pumped storage hydropower plants.The health of personnel and the safe operation of equipment are endangered due to high space humidity and water seepage through the walls. In this paper, numerical simulations were used to study the thermal and humidity environment of the main plant turbine floor in summer. Two working conditions with and without the dissipation of humidity are computed and compared. The psychrometric chart was also used to analyze the air treatment process in the turbine floor. Results show that the air temperature decreases by 28% and the relative humidity increases by 34% when considering the effect of the moisture dissipation source. The results of temperature and humidity analyzed by the psychrometric chart are similar to those of numerical simulation. And validition of the numerical method is conducted . The research results have a reference significance for predicting the relative humidity distribution of the turbine floor and the arrangement of dehumidification devices at design stage .

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“…Proses evaporasi pada produksi garam merupakan hal yang paling penting (Bramawanto et al, 2019). Proses evaporasi memiliki tujuan dalam penguapan air laut mencapai 89,9% dengan salinitas 3,85 º Be untuk menjadi kristal garam (Sedivy, 2009); (Sayer dan Campbell, 2012); (Li et al, 2021). Proses evaporasi air laut didukung dengan sinar matahari dan rendahnya intensitas curah hujan pada areal pegaraman (Adiraga, 2013).…”

Section: Pendahuluanunclassified

Peramalan Curah Hujan Terhadap Produktivitas Garam Di Gersik Putih Sumenep

et al. 2022

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Salt production in Madura Island is running by evaporation method (solar evaporator). Thus, the process of salt production is highly dependent on weather factors. Weather conditions is one of the determinants of the success of salt production targets. In this study aims to determine the forecasting process of rainfall in support of salt production process at PT Garam Gersik Putih Sumenep. The method used to analyze rainfall data on PT Garam Gersik Putih in 2022 is the box-Jenkins Autoregressive Integrated Moving Average (ARIMA) model. Box-Jenkins Autoregressive Integrated Moving Average (ARIMA) is one of the time series forecasting methods using values in the past as dependent variables and independent variables. From the forecast results, it is known that Gersik Putih Pheasant has 9 dry dasarian with an estimated production of 27,360 tons. Saltworks Gersik Putih has 456 plots of crystallization land with a total land area of 126.36 Ha. The results of weather forecasting analysis can determine the time of pre-production , salt production and post-production of salt. Pre-production of salt is an activity of preparation and maintenance of infrastructure to maximize the upcoming dry season. Pre-production of salt is carried out from January to May. Salt production activities are processing sea water into salt crystals that take place from June to early november. At the peak of drought in 1 plot of land crystallization can produce 3-6 tons in one harvest. Post salt production is the activity of transporting salt from pheasant land to olo warehouse which is carried out from November to December due to the increase in rainfall intensity. The box-Jenkins integrated Moving Average (ARIMA) Autoregressive Model applied has a pearson coefficient correlation level of 0,94%. The correlation value of the pearson coefficient shows that forecasting is very good, adequate and feasible to use. Produksi garam di Pulau Madura dilakukan dengan menggunakan metode penguapan (solar evaporator). Proses produksi garam bergantung pada curah hujan. Curah hujan menjadi penentu keberhasilan produksi garam. Pada penelitian ini bertujuan untuk mengetahui proses peramalan curah hujan dalam mendukung proses produksi garam pada PT Garam Gersik Putih Sumenep. Metode peramalan data curah hujan pada PT Garam Gersik Putih tahun 2022 adalah model Autoregressive Integrated Moving Average (ARIMA) Boox-Jenkins. ARIMA Boox-Jenkins adalah salah satu metode peramalan menggunakan nilai variabel independen dan variabel dependen. Dari hasil prakiraan diketahui bahwa pegaraman Gersik Putih memiliki ±9 dasarian kering dengan estimasi hasil produksi sebesar 27.360 ton. Pegaraman Gersik Putih memiliki 456 petak lahan kristalisasi dengan jumlah luas lahan 126,36 Ha. Hasil analisis peramalan cuaca juga dapat menentukan kapan berlangsungnya pra produksi garam, produksi garam serta pasca produksi garam. Pra produksi garam merupakan kegiatan persiapan dan pemeliharaan sarana prasarana untuk memaksimalkan musim kemarau mendatang. Pra produksi garam dilaksanakan pada bulan januari hingga mei. Kegiatan produksi garam yaitu mengolah air laut hingga menjadi kristal garam yang berlangsung bulan juni hingga november awal. Pada puncak kemarau dalam 1 petak lahan kristalisasi dapat menghasilkan 3 – 6 ton dalam sekali panen. Pasca produksi garam adalah kegiatan pengangkutan garam dari lahan pegaraman menuju gudang olo yang dilaksanakan bulan november hingga desember karena kenaikan intensitas curah hujan. Model Autoregressive Integrated Moving Average (ARIMA) Boox-Jenkins yang diterapkan memiliki tingkat korelasi koefisien pearson sebesar 0,94%. Nilai korelasi koefisien pearson tersebut layak untuk digunakan untuk metode peramalan.

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Impact of the water evaporation on the heat and moisture transfer in a high-temperature underground roadway

Cited by 28 publications

References 34 publications

Evaporation Rate Analysis Of Raw Water In Salt Production Using a Prototype At Salt House

Evaporation Rate Analysis Of Raw Water In Salt Production Using a Prototype At Salt House

Study on the Influence of Moisture Dissipation on the Thermal and Humidity Environment in the Turbine Floor of Underground Pumped Storage Hydropower Plants

Peramalan Curah Hujan Terhadap Produktivitas Garam Di Gersik Putih Sumenep

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