scholarly journals Karakteristik Pengeringan Biji Pala (Myristica fragranshoutt) Menggunakan Alat Pengering Hybrid dengan Sumber Panas Dari energi Surya dan Serbuk Kayu

2018 ◽  
Vol 3 (4) ◽  
pp. 849-858
Author(s):  
Debi Sarnadi ◽  
Raida Agustina ◽  
Rita Khathir
Keyword(s):  
Relative Humidity ◽  
Solar Irradiation ◽  
Heat Sources ◽  
Drying Method ◽  
Drying Process ◽  
Drying Time ◽  
Average Temperature ◽  
Ambient Relative Humidity ◽  
Average Relative Humidity ◽  
Drying Chamber

Abstrak. Manfaat dari proses pengeringan pala yaitu untuk tujuan pengawetan. Tujuan penelitian ini adalah untuk mengkaji proses pengeringan biji pala menggunakan alat pengering hybrid dengan sumber energi matahari dan biomassa serbuk kayu. Total biji pala yang dikeringkan adalah 15 kg. Pembakaran serbuk kayu dilakukan selama pengeringan di malam hari dengan laju 3kg/jam. Parameter penelitian meliputi iradiasi surya, temperatur, kelembaban relatif, kadar air, dan uji organoleptik terhadap warna dan aroma. Hasil penelitian menunjukkan bahwa iradiasi rata-rata yang diperoleh adalah 131,61 W/m2 pada hari pertama dan dihari kedua 131,08  W/m2. Temperatur dalam ruang pengering (44°C) lebih tinggi dibandingkan dengan temperatur lingkungan (33,5°C). Kelembaban relatif rata-rata ruang pengering (27,7%) lebih rendah dari kelembaban relatif rata-rata di lingkungan (42,7%). Untuk mencapai kadar air biji pala 10% dibutuhkan waktu 32 jam secara kontinu dengan alat pengering  dan 39 jam selama 4 hari secara intermitten dengan metode penjemuran. Kapasitas alat pengering 2x lebih besar dari kapasitas penjemuran, dan biji pala kering menggunakan alat pengering lebih disukai oleh panelis dari segi warna dan aromanya.Drying Characteristics of Nutmeg Seed (Myristica Fragranshoutt) by Using a Hybrid Dryer Used Heat Sources from Solar and Sawdust EnergyAbstract. The benefit of drying process of nutmeg seed is to prolong its life. The objective of the study was to observe the drying method of nutmeg seed by using a hybrid dryer used the heat sources from solar and biomass (sawdust) energy. The total nutmeg seed used in this study was approximately 15 kg. The combustion rate of biomass during the night was 3kg/h. The parameters investigated were solar irradiation, temperature, relative humidity, moisture content and organoleptic test on color and flavor. The results showed that the average solar irradiation was 131.61 W/m2 on the first and second day drying. The average temperature in the drying chamber (44°C) was higher than the average ambient temperature (33.5°C). The average relative humidity in the drying chamber (27.7%) was lower than the average ambient relative humidity (42.7%). To have the final moisture of nutmeg seed 10%, the drying time needed was 32 hours continuously by using hybrid dryer and 39 hours for 4 days intermittent by sundrying method.The dryer capacity was double of sundrying capacity, and the color and flavor of dried nutmeg seed produced by using hybrid dryer was preferred by respondents.Abstract. The benefit of drying process of nutmeg seed is to prolong its life. The objective of the study was to observe the drying method of nutmeg seed by using a hybrid dryer used the heat sources from solar and biomass (sawdust) energy. The total nutmeg seed used in this study was approximately 15 kg. The combustion rate of biomass during the night was 3kg/h. The parameters investigated were solar irradiation, temperature, relative humidity, moisture content and organoleptic test on color and flavor. The results showed that the average solar irradiation was 131.61 W/m2 on the first and second day drying. The average temperature in the drying chamber (44°C) was higher than the average ambient temperature (33.5°C). The average relative humidity in the drying chamber (27.7%) was lower than the average ambient relative humidity (42.7%). To have the final moisture of nutmeg seed 10%, the drying time needed was 32 hours continuously by using hybrid dryer and 39 hours for 4 days intermittent by sundrying method. The dryer capacity was double of sundrying capacity, and the color and flavor of dried nutmeg seed produced by using hybrid dryer was preferred by respondents.

scholarly journals Karakteristik Pengeringan Biji Jagung (Zea Mays L.) Menggunakan Alat Pengering Surya Adriyarkara Termodifikasi

2018 ◽  
Vol 3 (2) ◽  
pp. 351-360
Author(s):  
Athul Fadhli ◽  
Diswandi Nurba ◽  
Raida Agustina
Keyword(s):  
Zea Mays ◽  
Relative Humidity ◽  
Moisture Content ◽  
Zea Mays L ◽  
Initial Moisture Content ◽  
Solar Irradiation ◽  
Air Velocity ◽  
Drying Time ◽  
Average Temperature ◽  
Average Relative Humidity

Abstrak. Jagung merupakan tanaman penghasil karbohidrat terpenting. Pengeringan jagung pipil menggunakan alat pengering merupakan proses untuk menghasilkan jagung pipil yang siap diolah untuk pembuatan tepung jagung dengan batas kadar air tertentu sehingga menghaslkan jagung pipil dengan kualitas yang baik. Tujuan penelitian ini adalah untuk mengkaji karakteristik pengeringan biji jagung menggunakan alat pengering surya Termodifikasi. Metode penelitian  menggunakan 3,15 kilogram jagung pipil dengan kadar air awal 22% untuk proses pengeringan. Parameter yang dianalisis terkait alat pengering kolektor surya yaitu temperatur, kelembaban relatif, kecepatan udara dan iradiasi surya, sedangkan parameter yang dianalisis terkait bahan yaitu kadar air, lama waktu pengeringan, laju pengeringan dan organoleptik. Prosedur penelitian terdiri dari pengujian kosong dan pengujian dengan menggunakan jagung pipil. Hasil penelitian menunjukkan bahwa temperatur rata-rata dalam rak pengering sebelum dilakukan modifikasi yaitu 44,4oC, temperatur rata-rata setelah dilakukan modifikasi yaitu 55,5oC dan temperatur rata-rata rak pengering pada pengeringan menggunakan jagung pipil yaitu 46,96oC. Kelembaban relatif rata-rata dalam rak pengering sebelum dilakukan modifikasi yaitu 40,1%, kelembaban relatif rata-rata dalam rak pengering setelah modifikasi yaitu 35,1% dan kelembaban relatif rata-rata pengeringan menggunakan jagung pipil yaitu 44,45%. Dari hasil pengukuran tersebut menunjukkan bahwa nilai temperatur dan kelembaban pada alat setelah modifikasi lebih baik dibandingkan sebelum alat dimodifikasi. Pengukuran temperatur dan kelembaban relatif terdiri dari 4 titik pengukuran yaitu rak 1A,1B dan rak 2A, 2B. Kecepatan udara rata-rata yang diukur konstan yaitu 0,7 m/s pada ruang pengering, sedangkan lingkungan 1,1 m/s. Total iradiasi surya selama pengeringan yaitu 1848,84 W/m2. Kadar air jagung pipil masing-masing rak yaitu rak 1A 14,29%, rak 1B 14,47%, rak 2A 13,91% dan rak 2B 14,1%. Hasil dari pengujian organoleptik, panelis agak menyukai jagung pipil yang dikeringkan menggunakan alat pengering tersebut.Characteristics of Seed Drying (Zea mays L.) Using a Modified Adriyarkara Solar DryerAbstract. Corn is the most important carbohydrate plant. Drying corn using a drying tool is a process to produce corn that are ready to be processed for making corn flour with a certain water content limit so as to produce corn with good quality. The purpose of this study was to examine the characteristics of drying of corn kernels using a modified solar dryer. The research method used 3,15 kilogram of corn milled with the initial moisture content of 22% for drying process. The parameters analyzed in relation to solar collector dryers are temperature, relative humidity, air velocity and solar irradiation, while the parameters analyzed are materials such as moisture content, drying time, drying rate and organoleptic. The research procedure consists of unloaded testing and testing using corn. The results showed that the average temperature in the dryer tray before modification was 44,4°C, the average temperature after modification was 55,5°C and the average temperature of the dryer tray on drying using corn was 46,96oC. The average relative humidity in the dryer tray before modification is 40,1%, the average relative humidity in the dryer tray after modification is 35,1% and the average relative humidity of drying using corn is 44,45%. From the measurement results show that the value of temperature and humidity in the tool after modification is better than before. Measurement of temperature and relative humidity consist of 4 point of measurement that is tray 1A, 1B and tray 2A, 2B. Average mean air velocity measured is 0,7 m/s at the dryer room, while the environment is 1,1 m/s. Total solar irradiation during drying is 1848,84 W/m2. Moisture level of corn each shelves tray 1A is 14,29%, tray 1B is 14.47%, tray 2A is 13,91% and tray 2B is 14,1%. As a result of organoleptic testing, panelists rather like dried corn using the dryer.

scholarly journals “TEKO BERSAYAP” MODEL SOLAR DRYER FOR FISH DRYING

2016 ◽  
Vol 6 (2) ◽  
pp. 51-56 ◽  
Author(s):  
Yuwana Yuwana ◽  
Bosman Sidebang ◽  
Evanila Silvia
Keyword(s):  
Relative Humidity ◽  
Moisture Content ◽  
Ambient Temperature ◽  
The Sun ◽  
Drying Process ◽  
Drying Time ◽  
Sun Drying ◽  
Ambient Relative Humidity ◽  
Chamber Temperature ◽  
Drying Chamber

This objective of this research was to design a dryer called “Teko Bersayap” model and then to test its performance in drying fish in order to solve problems arising from open air sun drying. The dryer consisted of drying chamber with trays inside, heat collectors equipped with air inlets at their lower ends, chimney with an exhaust fan inside and humid air outlet at its upper end, was constructed to dry fish, “Bleberan (Pepetak Leiognatus spp)” species. The results of the experiment indicated that the dryer produced the drying chamber temperature 8.83oC higher than the ambient temperature and the relative humidity 13.91% lower than the ambient relative humidity. The fish moisture content decreased exponentially with drying time and the dryer completed the fish drying process in 18.9 hours compared to 27.6 hours of drying time needed to complete the sun drying for the fish, suggesting that the dryer was ready for utilization

CATFISH DRYING (Clarias Batraclus) USING ‘TEKO BERSAYAP’ SOLAR DRYER

2012 ◽  
Vol 2 (1) ◽  
pp. 14-20
Author(s):  
Yuwana Yuwana
Keyword(s):  
Relative Humidity ◽  
Moisture Content ◽  
Ambient Temperature ◽  
Drying Rate ◽  
Drying Process ◽  
Drying Time ◽  
Ambient Relative Humidity ◽  
Solar Dryer

Experiment on catfish drying employing ‘Teko Bersayap’ solar dryer was conducted. The result of the experiment indicated that the dryer was able to increase ambient temperature up to 44% and decrease ambient relative humidity up to 103%. Fish drying process followed equations : KAu = 74,94 e-0,03t for unsplitted fish and KAb = 79,25 e-0,09t for splitted fish, where KAu = moisture content of unsplitted fish (%), KAb = moisture content of splitted fish (%), t = drying time. Drying of unsplitted fish finished in 43.995 hours while drying of split fish completed in 15.29 hours. Splitting the fish increased 2,877 times drying rate.

scholarly journals Uji kinerja Alat Pengering Ikan Tipe Green-House Effect (GHE) Vent Dryer

2020 ◽  
Vol 13 (2) ◽  
pp. 84-93
Author(s):  
Muhammad Yasar ◽  
Raida Agustina ◽  
Mustaqimah Mustaqimah ◽  
Diswandi Nurba
Keyword(s):  
Relative Humidity ◽  
Solar Irradiation ◽  
Business Sector ◽  
Drying Process ◽  
Air Velocity ◽  
Fresh Fish ◽  
Green House ◽  
Solar Dryer ◽  
Air Circulation ◽  
Drying Chamber

Abstrak. Diantara permasalahan yang dihadapi oleh sektor usaha perikanan ialah  belum efisiennya teknis pengelolaan  dan tidak stabilnya kontinuitas produksi. Hal ini disebabkan oleh kurangnya sarana prasarana untuk mengolah ikan serta sistem pemasaran ikan segar yang masih konvensional, sehingga cepat membusuk apabila tidak diolah lebih lanjut. Penanganan dan pengolahan yang cepat dan tepat diperlukan untuk mengurangi resiko pembusukan dan dapat meningkatkan nilai jual hingga sampai kepada konsumen. Salah satu teknologi untuk meningkatkan masa simpan ikan ialah dengan cara proses pengeringan. Sebuah alat pengering ikan Green-House Effect (GHE) telah dikembangkan. Pengujian dan analisis alat pengering untuk ikan tersebut disajikan dalam makalah ini. Pengering surya ini menambahkan ventilator berupa exhaust fan guna memaksimalkan proses sirkulasi udara di dalam ruang pengeringan. Parameter yang diukur dalam pengujian ini adalah distribusi suhu, kelembaban relatif, iradiasi dan pengukuran kecepatan udara. Hasil penelitian menunjukan bahwa temperatur di dalam ruang pengering terlihat lebih tinggi yaitu 67°C dibandingkan dengan temperatur di lingkungan karena sifat absorber yang mampu menyerap panas. Sementara itu kelembaban relatif di dalam ruang pengering lebih rendah jika dibandingkan dengan kelembaban di lingkungan yaitu sebesar 30,1%. Nilai iradiasi surya yang diperoleh sangat berfluktuasi dengan nilai tertinggi adalah sebesar 180,6 W/m2. Kecepatan udara di dalam ruang pengering surya lebih stabil dibandingkan dengan kecepatan udara lingkungan karena adanya penambahan ventilator berupa exhaust fan. Hal inilah yang menyebabkan proses pengeringan menjadi lebih cepat.Performance of Green House Effect (GHE) Vent Dryer for Fish DryingAbstract. The problems that occur in the fishery business sector are inefficient and unstable continuity of production. The reasons for this include the lack of infrastructure for processing fish and also the very limited marketing of fresh fish due to its fast-rotting nature if not further processed. Fast and precise handling and processing are needed to reduce the risk of spoilage. One of the technologies to increase the shelf life of fish is the drying process. A greenhouse effect vent dryer type fish dryer has been developed. The testing and analysis of the dryer for these fish are presented in this paper. This solar dryer adds a ventilator in the form of an exhaust fan to maximize air circulation in the drying chamber. The parameters measured in this test are temperature distribution, relative humidity distribution, solar irradiation, and air velocity measurement. The results show that the temperature in the drying chamber is 67 ⸰C higher than the temperature in the environment due to the nature of the absorber which can absorb heat. Meanwhile, the relative humidity in the drying chamber was lower than the humidity in the environment, which was 30.1%. The value of solar irradiation obtained fluctuates where the highest irradiation is 180.6 W / m2. The air velocity in the solar dryer is more stable than the ambient airspeed due to the addition of a ventilator in the form of an exhaust fan. This causes the drying process to take place faster.

scholarly journals Kajian Keseragaman Kualitas Pengeringan Cabai Merah dengan Menggunakan Alat Pengering Tipe Hohenheim

2017 ◽  
Vol 2 (4) ◽  
pp. 524-536
Author(s):  
Edi Saputra ◽  
Mustaqimah Mustaqimah ◽  
Diswandi Nurba
Keyword(s):  
Relative Humidity ◽  
Vitamin C ◽  
Water Content ◽  
Red Pepper ◽  
Average Temperature ◽  
Average Relative Humidity ◽  
Final Water Content ◽  
Red Peppers ◽  
Drying Chamber

Hasil penelitian pengeringan cabai merah menunjukkan bahwa pada perlakuan tanpa blansir terdapat suhu rata-rata dalam ruang alat pengering pada hari pertama yaitu sebesar 54°C dan pada hari kedua yaitu sebesar 46,6°C,sedangkan suhu rata-rata pada perlakuan diblansir yaitu sebesar 58,6°C. Kelembaban relatif rata-rata dala ruang alat pengering pada perlakuan tanpa blansir pada hari pertama yaitu sebesar 40,2% dan kelembaban relatif rata-rata pada hari kedua yaitu sebesar 51%, sedangkan kelembaban relatif rata-rata pada perlakuan di blansir yaitu sebesar 35,7%. Kadar air akhir pada cabai merah kering dengan perlakuan tanpa blansir yaitu =9,84%, =10,50%, =10,06%, =9,84%,=10,28% dan =9,62%. Sedangkan Kadar air akhir pada cabai merah kering dengan perlakuan diblansir yaitu =9,74%, =9,74%, =10,36%, =10,15%,=9,74% dan =9,53%. Kandungan vitamin C didapat pada cabai merah kering dengan perlakuan tanpa blansir yaitu =39,33%, =43%, =45,6%, =44,93%,=41,27% dan =37,73%. Sedangkan kandungan vitamin C akhir pada cabai merah kering dengan perlakuan diblansir yaitu =34,13%, =37,4%,=40,8%, =38,87%,=36,07% dan =33,36%.Uji organoleptik Cabai merah kering menunjukkan bahwa panelis lebih banyak menyukai dengan perlakuan diblansir.Study The Uniformity Of Drying Quality Of Red Peppers Using Hohenheim Type DryersAbstract. From the results of red pepper cultivation research showed that on treatment without blancing there is average temperature in the dryer room on the first day that is equal to 54%°C and on the second day that is equal to 46,6°C, while the average temperature at the blancing treatment that is equal to 58,6°C. The average relative humidity in the drying chamber on the bluffing treatment on the first day is 40,2% and the average relative humidity on the second day is 51%, while the average relative humidity at the blancing treatment is 35,7%. The final water content of dried red pepper with bluff treatment is P1 = 9,84%, P2=10,50%, P3=10,06%, P4=9,84%, P5=10,28% and P6=9,62%. While the final water content of dried red pepper with blancing treatment is P1=9,74%, P2=9,74%, P3=10,36%, P4=10,15%, P5=9,74% and P6=9.53%. The content of vitamin C was found in dry red chilli with the treatment without blancing that is P1=39,33%, P2=43%, P3=45,6%, P4=44,93%, P5=41,27% and P6=37,73%. While the final vitamin C content of dried red pepper with blancing treatment is P1=34,13%, P2=37,4%, P3=40,8%, P4=38,87%, P5=36,07% and P6=33.36%. The red pepper organoleptic test showed that the panelists preferred the treatment in blancing.

scholarly journals The Effect of Temperature and Humidity May Reduce the Growth Rate of the Coronavirus Disease 2019 Epidemic

2020 ◽  
Author(s):  
Lei Qin ◽  
Qiang Sun ◽  
Jiani Shao ◽  
Yang Chen ◽  
Xiaomei Zhang ◽  
...  
Keyword(s):  
Growth Rate ◽  
Relative Humidity ◽  
Effect Of Temperature ◽  
Average Temperature ◽  
Temperature And Humidity ◽  
Scatter Plots ◽  
Low Humidity ◽  
Average Relative Humidity ◽  
Effects Of Temperature ◽  
The Relationship

Abstract Background: The effects of temperature and humidity on the epidemic growth of coronavirus disease 2019 (COVID-19)remains unclear.Methods: Daily scatter plots between the epidemic growth rate (GR) and average temperature (AT) or average relative humidity (ARH) were presented with curve fitting through the “loess” method. The heterogeneity across days and provinces were calculated to assess the necessity of using a longitudinal model. Fixed effect models with polynomial terms were developed to quantify the relationship between variations in the GR and AT or ARH.Results: An increased AT dramatically reduced the GR when the AT was lower than −5°C, the GR was moderately reduced when the AT ranged from −5°C to 15°C, and the GR increased when the AT exceeded 15°C. An increasedARH increased theGR when the ARH was lower than 72% and reduced theGR when the ARH exceeded 72%.Conclusions: High temperatures and low humidity may reduce the GR of the COVID-19 epidemic. The temperature and humidity curves were not linearly associated with the COVID-19 GR.

OPTIMIZATION OF DRYING OF TOBACCO LEAF WITH A SLIT OF THE MIDDLE VEIN ACCORDING TO THE QUALITY INDICATORS OF TOBACCO RAW MATERIALS

2021 ◽  
Author(s):  
Е.Е. УЛЬЯНЧЕНКО
Keyword(s):  
Chemical Composition ◽  
Quality Indicators ◽  
Raw Materials ◽  
Technological Properties ◽  
Drying Method ◽  
Drying Process ◽  
Protein Ratio ◽  
Drying Time ◽  
Tobacco Leaves ◽  
Tobacco Leaf

При производстве табачного сырья важную роль играет сокращение продолжительности сушки табачных листьев. Одним из способов интенсификации сушки свежеубранных табачных листьев является прием прорезания средней жилки (ПСЖ) листьев вдоль волокон. По результатам исследований 2019–2020 гг. была создана база данных табачного сырья, полученного при естественном способе сушки с применением приема ПСЖ, которая может служить информационным материалом для производителей табака. Проведена оптимизация процесса сушки табачного листа ПСЖ по показателям качества табачного сырья для расширенного диапазона сортотипов табака. Объектом исследований были сорта отечественной селекции, включенные в Государственный реестр селекционных достижений, допущенные к использованию: Самсун 85, Вирджиния 202, Юбилейный новый 142, Трапезонд 92, Трапезонд 204, Дюбек 33, Американ 287 и Крупнолистный Ильский (находится в стадии государственных испытаний). Критерием оценки эффективности применения приема ПСЖ на исследованных сортах табака являлся совокупный сравнительный анализ следующих показателей контрольных (без ПСЖ листа) и опытных образцов: уровень интенсификации сушки, показатели товарного качества, технологических свойств и химического состава полученного сырья. Установлено, что ПСЖ позволяет интенсифицировать процесс сушки в 1,3–2,46 раза в зависимости от сорта табака и положительно влияет на технологические свойства сырья, у большинства сортов увеличивается выход волокна и сохраняются объемно-упругие свойства. Динамика сушки оказывает влияние на изменение химического состава сырья. В процессе сушки за счет гидролизации солей никотина и его освобождения путем окисления кислородом воздуха уровень никотина в ряде образцов снижается в пределах 10–30%. Чем выше содержание никотина, тем выше крепость табака, грубее его вкус. Изменения углеводно-белкового соотношения в сторону повышения углеводов улучшают вкусовые характеристики сырья. По каждому исследованному сорту не удалось выявить закономерной зависимости его структуры и характера процесса сушки при ПСЖ с преобразованиями химического состава сырья. На основе анализа технологических и качественных показателей табачного сырья, представленных в разработанной базе данных по интенсификации сушки различных сортов табака с применением приема ПСЖ табачных листьев, можно планировать выбор оптимального способа сушки для каждого сорта табака, позволяющего повысить эффективность использования сырья и улучшить его качественные характеристики. In the production of tobacco raw materials, reducing the drying time of tobacco leaves plays an important role. One of the ways to intensify the drying of freshly harvested tobacco leaves is the method of cutting the middle vein (CMV) of the leaves along the fibers. Based on the results of research in 2019–2020, a database of tobacco raw materials obtained by a natural drying method using CMV reception was created, which can serve as information material for tobacco producers. The optimization of the process of drying the CMV tobacco leaf according to the quality indicators of tobacco raw materials for an expanded range of tobacco variety types was carried out. The object of research was the varieties of domestic selection included in the State Register of Breeding Achievements, approved for use: Samsun 85, Virginia 202, Yubileyny novy 142, Trapezond 92, Trapezond 204, Dubek 33, American 287 and Krupnolistnyy Ilskiy (under state testing). The criterion for evaluating the effectiveness of the use of CMV intake on the studied tobacco varieties was a cumulative comparative analysis of the following indicators of control (without CMV sheet) and experimental samples: the level of drying intensification, indicators of commercial quality, technological properties and chemical composition of the obtained raw materials. It is established that CMV allows to intensify the drying process by 1,3–2,46 times, depending on the tobacco variety and has a positive effect on the technological properties of raw materials, most varieties increase the yield of fiber and retain volume-elastic properties. The dynamics of drying affects the change in the chemical composition of raw materials. During the drying process, due to the hydrolysis of nicotine salts and its release by oxidation with air oxygen, the nicotine level in a number of samples decreases within 10–30%. The higher the nicotine content, the higher the strength of tobacco, it is coarser in taste. Changes in the carbohydrate-protein ratio in the direction of increasing carbohydrates improve the taste characteristics of raw materials. For each studied variety, it was not possible to identify a regular dependence of its structure and the nature of the drying process at CMV with transformations of the chemical composition of raw materials. Based on the analysis of technological and qualitative indicators of tobacco raw materials presented in the developed database on the intensification of drying of various varieties of tobacco using the use of CMV of tobacco leaves, it is possible to plan the choice of the optimal drying method for each variety of tobacco, which allows to increase the efficiency of using raw materials and improve its quality characteristics.

EVALUATION OF INDOOR ENVIRONMENT CONDITIONS IN OFFICES LOCATED IN BUILDINGS WITH LARGE GLAZED AREAS

2008 ◽  
Vol 14 (1) ◽  
pp. 39-44 ◽  
Author(s):  
Lina Šeduikytė ◽  
Valdas Paukštys
Keyword(s):  
Relative Humidity ◽  
Field Study ◽  
Indoor Environment ◽  
Subjective Evaluation ◽  
Heating Season ◽  
Dry Skin ◽  
Average Temperature ◽  
Average Relative Humidity ◽  
Indoor Spaces ◽  
Objective And Subjective Evaluation

The field study was carried out during the heating season in two Lithuanian office buildings with large glazed areas. The methodology was prepared for evaluating indoor microclimate parameters while using objective and subjective evaluation. The results show that the average temperature in all tested offices was in the range of optimal zones, but in some offices the average temperature was not in compliance with the recommended temperature for offices. During the subjective evaluation, respondents working in these offices identified complains because of too high temperatures, stuffy air and irritation in eyes. The average relative humidity measured in all tested offices was not in compliance with the optimal requirements. Such SBS symptoms as irritation in eyes, cough and dry skin of the hands were identified as the most frequent symptoms in the second tested building. Main indoor microclimate problems arising in buildings with large glazed areas were related to overheating indoor spaces because of the direct sun and improper ventilation. Santrauka Straipsnyje nagrinėjamos patalpų mikroklimato sąlygos pastatuose esančiuose biuruose, turinčiuose didelius įstiklintus plotus. Didelių skaidrių atitvarų plotų įrengimas pastatuose ne tik didina energijos sąnaudas pastatams šildyti, vėsinti ir orui kondicionuoti, bet ir sukuria mikroklimato sąlygas, kuriose dirbantys žmonės dažnai patiria šiluminį diskomfortą, nors aplinkos parametrai atitinka normų reikalavimus. Natūriniams patalpų mikroklimato tyrimams sukurta patalpų mikroklimato tyrimo metodika, kuri sieja objektyvius ir subjektyvius tyrimo metodus patalpų sąlygoms optimaliai įvertinti. Patalpų mikroklimato sąlygos tiksliausiai įvertinamos pagal patalpų mikroklimato parametrų matavimo, papildyto subjektyvaus mikroklimato sąlygų įvertinimu, apibendrintos analizės rezultatus.

scholarly journals The Effect of Drying Parameters on the Quality of Pork and Poultry-Pork Kabanosy Produced according to the Traditional Specialties Guaranteed Recipe

2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
Marta Chmiel ◽  
Lech Adamczak ◽  
Katarzyna Wrońska ◽  
Dorota Pietrzak ◽  
Tomasz Florowski
Keyword(s):  
Relative Humidity ◽  
Salt Content ◽  
Raw Material ◽  
Chemical Components ◽  
Drying Process ◽  
Final Yield ◽  
Drying Conditions ◽  
Drying Chamber ◽  
Selection Of

The aim of this study was to determine the effect of differentiated air relative humidity during the drying process on selected quality features of TSG (traditional specialties guaranteed) pork and poultry-pork kabanosy. After heat treatment and 24-hour cooling at 4–6°C, the products were placed in three chambers at 15°C with differentiated air relative humidity: 60, 70, and 80%, respectively. The drying process was carried out until all variants of kabanosy achieved the required final yield of the product (<68%). Color components, water activity and shear force, water, protein, fat, and salt content, and the TBARS indicator values were determined. The drying process might be shortened (~50%) by a reduction of humidity in the drying chamber from 80 to 60%. The changes in the content of chemical components in pork kabanosy compared to poultry-pork ones demonstrated the different dynamics of the drying of the two types of kabanosy and the need for the selection of optimum drying conditions relative to raw material composition.

scholarly journals Drying of cherry tree chips in the experimental biomass dryer with solar collector

2012 ◽  
Vol 58 (No. 1) ◽  
pp. 16-23 ◽  
Author(s):  
T. Ivanova ◽  
B. Havrland ◽  
P. Hutla ◽  
A. Muntean
Keyword(s):  
Solar Collector ◽  
Biomass Conversion ◽  
Monitoring And Evaluation ◽  
Drying Process ◽  
Cherry Tree ◽  
Drying Time ◽  
Solid Biofuels ◽  
Relative Air Humidity ◽  
Drying Chamber

Drying significantly influences the process of a biomass conversion into the renewable energy source as well as quality of solid biofuels (briquettes, pellets). The research is focused on monitoring and evaluation of the drying process in the case of cherry tree chips drying in experimental biomass dryer with solar collector. The dryer has been conceived as a result of the project which was realized at the State Agrarian University of Moldova. Technological and construction specifics of the biomass dryer are described in the paper. The moisture content of the cherry tree chips was observed in dependence of the drying time and at different locations of the drying chamber. The drying process in the biomass layer was found as non-uniform. Further parameters such as relative air humidity and the air temperature were measured and analysed, as well. It was concluded that the experimental biomass dryer with solar collector can work well in the conditions of the Central Moldova during the sunny period of the year.

Sign in / Sign up

Export Citation Format

Share Document