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Performance test of organic planting bags for woody plant seedlings

International Journal of Agricultural and Biological Engineering 2020年第5期13卷 93-98页

作者： Musthofa Lutfi wahyunanto agung nugroho Huy Thanh Vo Gunomo Djoyowasito Ary Mustofa Ahmad Sandra Sandra Department of Agricultural Engineering Faculty of Agricultural TechnologyBrawijaya UniversityMalang 65145Indonesia Division of Urban Infrastructural Engineering Mien Trung University of Civil EngineeringPhu Yen 56000Vietnam

Organic planting bag has been developed to overcome both weaknesses of plastic polybags,contaminating the soil and damaging the plant’s root when transplanting.The improvement in this stage was achieved by inserting coconut fiber to strengthen a bag.The main purpose of this study was to investigate the effectiveness of seedling and transplanting by using organic planting bags,employed,three woody plants,i.e.,Albizia(Albizia julibrissin),Cadam(Neolamarckia cadamba)and Gmelina(Gmelina arborea).Performance testing of organic plant bags was conducted on three compositions of coconut fiber and water hyacinth.Two stages of experiments were conducted to know bag performance.First,the testing of organic plant bags during the nursery was conducted for 50 d from day 0 to day 50.Second,the testing of organic plant bags after transplanting and observed on days 60,70,and 80,after transplanted on the field.The parameters in this study were plant height,a total of roots that penetrate the organic plant bags and a total of leaves and stem diameters of plant grown in the organic bag and transplanting on land.The results showed that organic planting bag with the composition 155 g of coconut fiber and 505 g of water hyacinth(A3B3)has 0.020 kg/cm^(2) compressive strength and provides the best plant growth rates.Compressive strength affects the number of roots which penetrate the organic bag.Generally,the growth of seed in organic bags is faster than that in polybags.Albizia shows a higher growth rate(0.379 cm/d)compared to Cadam and Gmelina.

关键词： seedling effectiveness organic planting bag nursery transplanting woody plant

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Mitigating Carbon Emissions:A Comprehensive Analysis of Transitioning to Hydrogen-Powered Plants in Japan’s Energy Landscape Post-Fukushima

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Energy Engineering 2024年第5期121卷 1143-1159页

作者： nugroho agung Pambudi Andrew Chapman Alfan Sarifudin Desita Kamila Ulfa Iksan Riva Nanda Department of Mechanical Engineering Education Universitas Sebelas MaretSukoharjo57161Indonesia International Institute for Carbon-Neutral Reserch(WPI-I2CNER) Kyushu UniversityFukuoka819-0395Japan Postgraduate of Mechanical Engineering Universitas Sebelas MaretSurakarta57126Indonesia Energy and Society Laboratory Department of Mechanical Engineering EducationUniversitas Sebelas MaretSukoharjo57161Indonesia Department of Metallurgical and Material Engineering Universitas IndonesiaDepok16424Indonesia

One of the impacts of the Fukushima disaster was the shutdown of all nuclear power plants in Japan,reaching zero production in 2015.In response,the country started importing more fossil energy including coal,oil,and natural gas to fill the energy gap.However,this led to a significant increase in carbon emissions,hindering the efforts to reduce its carbon footprint.In the current situation,Japan is actively working to balance its energy requirements with environmental considerations,including the utilization of hydrogen fuel.Therefore,this paper aims to explore the feasibility and implications of using hydrogen power plants as a means to reduce emissions,and this analysis will be conducted using the energy modeling of the MARKAL-TIMES Japan framework.The hydrogen scenario(HS)is assumed with the extensive integration of hydrogen into the power generation sector,supported by a hydrogen import scheme.Additionally,this scenario will be compared with the Business as Usual(BAU)scenario.The results showed that the generation capacities of the BAU and HS scenarios have significantly different primary energy supplies.The BAU scenario is highly dependent on fossil fuels,while the HS scenario integrates hydrogen contribution along with an increase in renewable energy,reaching a peak contribution of 2,160 PJ in 2050.In the HS scenario,the target of reducing CO_(2) emissions by 80%is achieved through significant hydrogen penetration.By 2050,the total CO_(2) emissions are estimated to be 939 million tons for the BAU scenario and 261 million tons for the Hydrogen scenario.In addition,the contribution of hydrogen to electricity generation is expected to be 153 TWh,smaller than PV and wind power.

关键词： Business as usual(BAU)scenario hydrogen scenario CO_(2)emissions power generation sector

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木本植物幼苗有机种植袋性能试验

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农业工程技术 2021年第6期41卷 89-89页

作者： Musthofa Lutfi wahyunanto agung nugroho Huy Thanh Vo Gunomo Djoyowasito Ary Mustofa Ahmad Sandra Sandra 印度尼西亚布拉维贾亚大学农业技术学院农业工程系

有机种植袋的开发应用可以克服塑料袋带来的污染土壤和移植时损害植物根系的缺点。通过加入椰子纤维来加强有机种植袋的韧性。该研究的主要目的是探讨三种木本植物Albizia julibrisin、Neolamarckia cadamba和Gmelina arborea采用有机... 详细信息

有机种植袋的开发应用可以克服塑料袋带来的污染土壤和移植时损害植物根系的缺点。通过加入椰子纤维来加强有机种植袋的韧性。该研究的主要目的是探讨三种木本植物Albizia julibrisin、Neolamarckia cadamba和Gmelina arborea采用有机种植袋育苗移栽的效果。对椰子纤维和水葫芦三种成分的有机植物袋进行了性能测试。为了解种植袋的性能,进行了两个阶段的试验。首先,从第0天至第50天,在苗圃期间进行50d的有机植物袋试验。其次,移栽后第60天、70天、80天对有机植物袋进行检测,并进行田间观察。该研究中的参数为株高、穿透有机种植袋的总根数以及在有机种植袋中生长并在田间移栽的植物的总叶数和茎径。结果表明,椰子纤维155g和水葫芦505g组成的有机种植袋(A3B3)的抗压强度为0.020 kg/cm2,具有最佳的植株生长速率。抗压强度影响穿透有机袋的根数。一般来说,有机种植袋中种子的生长速度比塑料袋里的要快。Albizia的生长速率(0.379 cm/d)高于Cadam和Gmelina。

关键词：苗木效益有机种植袋苗圃移栽木本植物

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An agent-based model of agricultural land expansion in the mountain forest of Timor Island,Indonesia

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Journal of Mountain Science 2024年第7期21卷 2263-2282页

作者： PUJIONO Eko SADONO Ronggo IMRON Muhammad Ali SUTOMO JANUAR Hedi Indra KUSWANDI Relawan KURNIAWAN Hery HADI Etik Erna Wati SAPUTRA Muhammad Hadi HIDAYAH Izhamil HUMAIDA Nida SUKMAWATI Jalma Giring HADIYAN Yayan nugroho agung Wahyu HANI Aditya Research Center for Ecology and Ethnobiology National Research and Innovation Agency Republic of Indonesia(BRIN)Jl.Raya Jakarta-Bogor KM.46CibinongBogor 16911Indonesia Faculty of Forestry Gadjah Mada UniversityJl.Agro No.1Yogyakarta 55281Indonesia

The Mutis-Timau Forest Complex,located on Timor Island,Indonesia,is a mountainous tropical forest area that gradually decreases due to deforestation and forest degradation.Previous modelling studies based on patterns indicate that deforestation primarily occurs at lower elevations and near the boundaries of forests and settlements,often associated with shifting cultivation by local farmers.This study adopts a process-based modelling approach,specifically the agent-based model,to simulate land changes,particularly farmers'expansion of agricultural land around the Mutis mountain forest.The underlying concept of this agent-based approach is the interaction between the human and environmental systems.Farmers,representing the human system,interact with the land,which represents the environmental system,through land use decision-making mechanisms.The research was conducted in the Community Forest of the Timor Tengah Utara District,one of the sites within the Mutis-Timau Forest Complex with the highest deforestation rate.Land use change simulations were performed using agent-based modelling from 1999 to 2030,considering the socio-economic conditions of farmers,spatial preferences,land use decisions,and natural transitions.The results revealed that the agricultural area increased by 14%under the Business as Usual scenario and 5%under the Reducing Emission from Deforestation and Forest Degradation scenario,compared to the initial agricultural area of 245 hectares.The probability of farmers deciding to extend agricultural activities was positively associated with the number of livestock maintained by farmers and the size of the village area.Conversely,the likelihood of farmers opting for agricultural extensification decreased with an increase in the area of private land and the farmer's age.These findings are crucial for the managers of the Mutis-Timau Forest Complex and other relevant stakeholders,as they aid in arranging actions to combat deforestation,designing proper forest-related policies,and providing support for in

关键词： Agricultural land expansion Simulation Agent-based model Farmer Deforestation Mountainous tropical forest

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The Use of Single-Phase Immersion Cooling by Using Two Types of Dielectric Fluid for Data Center Energy Savings

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Energy Engineering 2022年第1期119卷 275-286页

作者： nugroho agung Pambudi Awibi Muhamad Yusuf Alfan Sarifudin Energy and Society Laboratory Mechanical Engineering EducationUniversitas Sebelas MaretSurakarta57126Indonesia

Data centers are recognized as one of the most important aspects of the fourth industrial revolution since conventional data centers are inefficient and have dependency on high energy consumption,in which the cooling is responsible for 40%of the usage.Therefore,this research proposes the immersion cooling method to solving the high energy consumption of data centers by cooling its component using two types of dielectric fluids.Four stages of experimentalmethods are used,such as fluid types,cooling effectiveness,optimization,and durability.Furthermore,benchmark software is used to measure the CPU maximum work with the temperature data performed for 24 h.The results of this study show that the immersion cooling reduces 13℃ lower temperature than the conventional cooling method which means it saves more energy consumption in the data center.The most optimum variable used to decrease the temperature is 1.5 lpm of flow rate and 800 rpm of fan rotation.Furthermore,the cooling performance of the dielectric fluids shows that the mineral oil(MO)is better than the virgin coconut oil(VCO).In durability experiment,there are no components damage after five months immersed in the fluid.

关键词： Single-phase immersion cooling data center dielectric fluid mineral oil virgin coconut oil

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Prospects and Challenges of Utilizing Solar Energy for the COVID-19 Vaccine Cold Storage in Remote Clinics of Tropical Countries:Review

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Energy Engineering 2022年第4期119卷 1403-1418页

作者： Indra Mamad Gandidi Apri Wiyono nugroho agung Pambudi Rahmat Romadhon Alfan Sarifudin Department of Mechanical Engineering Education Universitas Pendidikan IndonesiaBandung40154Indonesia Department of Mechanical Engineering Education Universitas Sebelas MaretSurakarta57126Indonesia Department of Mechanical Engineering Institute Teknologi BandungBandung40116Indonesia

The rapid spread of COVID-19 pandemic has forced several countries in the world to store vaccines in cold storage towards ensuring their protection from being damaged and to maintain their stability.However,most remote clinics,especially those in the equator and islands,are faced with the challenges of hot climates and the inability to afford electricity resources needed to power the cold storage facility.Meanwhile,the hot equatorial region has abundant solar energy to power the vaccine cold storage but previous studies showed that several field workers do not have the ability to maintain the vaccine storage temperature as indicated by the manufacturer’s recommendations.Therefore,this literature review study examines the prospects and challenges of implementing solar-powered cold storage to provide cooling space for remote clinics.This is expected to contribute significantly to cold chain vaccine management technology.The findings showed that four technology integration schemes including Cold Storage Ice Maker,Cold Storage Ice Maker-PCM,Refrigerator-Ice Maker and,Absorbing Cooling-PV-Ice Maker have the potential to be applied in clinics situated in certain tropical regions.

关键词： COVID-19 vaccine cold storage solar power remote clinic

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Stepwise Pyrolysis by LBCR Downstream to Enhance of Gasoline Fraction of Liquid Fuel from MMSW

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Energy Engineering 2022年第3期119卷 1169-1178页

作者： Indra Mamad Gandidi Edy Suryadi Efri Mardawati Dwi Rustam Kendarto nugroho agung Pambudi Department of Mechanical Engineering Education Universitas Pendidikan IndonesiaBandung40154Indonesia Postgraduate Student of Doctoral Program Faculty Agroindustrial TechnologyUniversitas PadjadjaranJatinangor45363Indonesia Faculty Agroindustrial Technology Universitas PadjadjaranJatinangor45363Indonesia Department of Mechanical Engineering Education Universitas Sebelas MaretSurakarta57126Indonesia

Pyrolysis is one of the thermal cracking methods to convert hydrocarbon to liquid fuel.The quantity and quality of the process are dependent on several condition including temperature,reaction time,catalyst,and the type of reactor.Meanwhile,a gasoline fraction was maximum product to be considered in the pyrolisis process.Therefore,this study aims to increase the gasoline fraction in liquid fuel using stepwise pyrolysis with a long bed catalytic reactor downstream(LBCR).The LBCR downstream was equipped with the top and bottom outlet and the fed source was mixed municipal solid waste(MMSW).The activated natural dolomite at 500℃ was used to allow the repetition of the secondary cracking.Also,the reactor temperature was setup at around 200℃-300℃ and the pyrolizer was 400℃.To analyze the gasoline fraction and physical properties of liquid fuel,Gas Chromatography-Mass Spectroscopy(GC-MS)and ASTM standard were employed.The experimental results showed there was a significant increase in the gasoline fraction of liquid fuels compared to using direct catalytic cracking and absence of catalysts.By using a LBCR at 250℃,the liquid fuel obtained at top outlet(TO)and bottom outlet(BO)have 84.08 and 56.94 percent peak area of gasoline fraction(C5-C12),respectively.The average value(TO and BO)of the fraction at 250℃ by LBCR was 70.51 percent peak area and it was increased by about 93.6%and 51.14%compared to without catalyst and direct catalytic,respectively.Furthermore,pyrolytic liquid oils were found to have kinematic viscosity of 2.979 and 0.789 cSt,density of 0.781 and 0.782 g/cm^(3),and flash point<−5℃ for BO-250 and TO-250 liquid fuel,respectively.These results showed BO liquid fuel was comparable to diesel conventional fuel while TO liquid fuel was comparable to gasoline.Evidently,the presence of LBCR made a major contribution to generate multi secondary cracking and to produce more gasoline fraction from mixed MMSW feedstock,as well as to increase the physical properties of liquid fuel.

关键词： Liquid fuel gasoline fraction LBC MMSW stepwise pyrolysis natural dolomite catalys

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Engine Performance Using Blended Fuels of Biodiesel and Eco Diesel

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Energy Engineering 2023年第1期120卷 107-123页

作者： Muhammad Idris IHusin Indra Hermawan Uun Novalia RDBatubara nugroho agung Pambudi Alfan Sarifudin Study Program of Mechanical Engineering Universitas Medan AreaMedan20156Indonesia Study Program of Mechanical Engineering Politeknik Negeri MedanMedan20156Indonesia Study Program of Industrial Engineering Universitas Harapan MedanMedan20156Indonesia Department of Mechanical Engineering Education Universitas Sebelas MaretSurakarta57126Indonesia

Diesel engines is an internal combustion engine with high thermal efficiency,which also uses biodiesel fuel,an environmentally friendly,non-toxic,and low sulfur content.Biodiesel has been around for a long time due to its similar characteristics to diesel fuels which has limited availability.However,several disadvantages are associated with biodiesel,such as poor volatility and high viscosity,which reduces engine performance.Therefore,this study was carried out to improve the diesel engine performance by mixing biodiesel with ecodiesel(ED),an additive produced from natural ingredients that is dissolvable in biodiesel.The biodiesel fuel properties used are density 860 kg/m3,dynamic viscosity 4.50E-06 m2/s,cetane number 45,and flashpoint 52°C.The results showed that biodiesel-ED mixture could improve engine performance and the optimum performance was at a speed of 3000 rpm on 43.30(kW),124.93(N.m)of the engine torque,and 2.45E–5(kg/kW.s)of the specific fuel consumption.According to paired sample t-test,the difference in the engine performance is only experienced in the torque,which has a significant increase in the composition of the biodiesel+ED by 0.07 gr mixture.

关键词： Car vehicle experiment combustion ED renewable energy

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Effects of 8-Hydroxyisocapnolactone-2-3-diol and friedelin on mast cell degranulation

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Asian Pacific Journal of Tropical Medicine 2017年第11期10卷 1043-1046页

作者： Muhammad Novrizal Abdi Sahid agung Endro nugroho Ratna Asmah Susidarti Kazutaka Maeyama Department of Pharmacology Graduate School of MedicineEhime UniversityEhime791-0295Japan Department of Pharmaceutical Chemistry Faculty of PharmacyUniversitas Gadjah MadaYogyakarta55281Indonesia Department of Pharmacology Faculty of PharmacyUniversitas Gadjah MadaYogyakarta55281Indonesia

Objective: To investigate the effects of friedelin(terpenoid) and 8-hydroxyisocapnolactone-2-3-diol(coumarin) with concentration 10 mM, 30 m M, and 100 mM on inhibiting mast cells(MCs) degranulation.Methods: The investigation was performed in vitro by administering each compound into rat peritoneal MCs and rat basophilic leukemia-2 H3 cells followed by activation with50 mg/m L of compound 48/80 or 1 m M of ionomycin. The concentration of histamine released from each group was measured by a high-performance liquid chromatographyfluorometry system with post-column derivatization using o-phthalaldehyde.Results: 8-Hydroxyisocapnolactone-2-3-diol inhibited degranulation of compound 48/80 activated-rat peritoneal MCs with the histamine release percentages of 74.57%,72.21% and 51.79% when the 10 mM, 30 m M and 100 mM concentrations were used,respectively. Where as about 81% histamine was released by the control group.Degranulation inhibition ability was also observed in ionomycin-activated rat basophilic leukemia-2 H3 cells. In contrast, friedelin failed to inhibit degranulation in either cell type.The inhibition of 8-hydroxyisocapnolactone-2-3-diol was not related to the depletion of histamine synthesis as implied by the total histamine measurement.Conclusions: These results exhibit the promising of 8-hydroxyisocapnolactone-2-3-diol is a potential parent structure for developing a MCs stabilizer.

关键词： 8-Hydroxyisocapnolactone-2-3-diol Friedelin 桅杆房间 Degranulation 组织安

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Experimental Investigation of Organic Rankine Cycle (ORC) for Low Temperature Geothermal Fluid: Effect of Pump Rotation and R-134 Working Fluid in Scroll-Expander

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Energy Engineering 2021年第5期118卷 1565-1576页

作者： nugroho agung Pambudi Santiko Wibowo Ranto Lip Huat Saw Energy and Society Laboratory Mechanical Engineering EducationUniversitas Sebelas MaretSurakarta57126Indonesia Lee Kong Chian Faculty of Engineering and Science UTARKajang43000Malaysia

Organic Rankine Cycle(ORC)is one of the solutions to utilize a low temperature geothermal fluid for power generation.The ORC system can be placed at the exit of the separator to extract energy from brine.Furthermore,one of the main components of the system and very important is the pump.Therefore,in this research,the pump rotation is examined to investigate the effect on power output and energy efficiency for low temperature geothermal fluid.The rotation is determined by using an inverter with the following frequencies:7.5,10,12.5,15 and 17.5 Hz,respectively.R-134 working fluid is employed with 373.15 K evaporator temperature in relation to the low temperature of the geothermal fluid.Furthermore,the condenser temperature and fluid pressure were set up to 293.15 K and 5×10^(5) Pa,respectively.This research uses a DC generator with a maximum power of 750 Watt and the piping system is made from copper alloy C12200 ASTM B280 with size 1.905×10^(−2) m and a thickness of 8×10^(−4) m.The results showed that there is an increase in mass flow rate,enthalpy and generator power output along with increasing pump rotation.In addition,it showed that the maximum generator output power was 377.31 Watt at the highest pump rotation with a frequency of 17.5 Hz.

关键词： Organic Rankine Cycle(ORC) geothermal energy pump R-134a energy efficiency

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