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All Journal Abdimas UNWAHAS : Jurnal Pengabdian Masyarakat UNWAHAS Research In Chemical Engineering Jurnal Polimesin
Indah Hartati
Universitas Wahid Hasyim
Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Economics, Econometrics & Finance Energy Engineering Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Social Sciences

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Kinetics of Cucurbita Moschata Puree Drying with Maltodextrin as Drying Aid Indah Hartati; Salsa Erna Setiawati; Suwardiyono; Farikha Maharani; Safaah Nur Faizin
Research in Chemical Engineering Vol. 1 No. 1 (2022): March
Publisher : Universitas Muhammadiyah Purwokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (496.954 KB) | DOI: 10.30595/rice.v1i1.7

Abstract

The objective of this research was to investigate the influence of maltodextrin addition of pumpkin puree drying as well as studied the drying kinetics. Several thin layer drying kinetics model comprised of Page, Lewis, Henderson Pabis, Two Term, Weibull as well as diffusion model were used to studied the behavior of pumpkin drying. The puree drying was conducted by added 15% of maltodextrin on pumpkin puree. The drying temperatures were varied of 60-70 The research result show that temperature influence the pumpkin puree drying in which added with maltodextrin as the drying aid. Pumpkin puree drying with addition of maltodextrin performed at temperature of 70 for 150 minutes is considered as the relatively suitable condition as it gives low moisture ratio of 0.07. The thin layer drying kinetics, Midili, give good fittest to the experimental data followed by Page and Weibull. The effective diffusivity is in range of m/s with the obtained activation energy is 30.36 kJ/mol.
Performance assessment of an R290 air conditioning system using hybrid ZnO–SiO₂ nanolubricant Agung Nugroho; Tabah Priangkoso; Muhammad Alaik Amirullah; Indah Hartati; Fatna Nur Hidayah; Kofi Ampomah Benefo
Jurnal Polimesin Vol 24, No 3 (2026): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v24i3.8924

Abstract

This study investigates the performance of a split air conditioning system using hybrid ZnO–SiO₂ nano lubricant with R290 refrigerant. Experiments were conducted under steady-state conditions at an ambient temperature of 27 ± 1°C with a constant cooling load. Nano lubricant concentrations of 0.18%, 0.36%, 0.91%, 1.79%, and 2.67% by mass were prepared using a two-step dispersion method involving mechanical stirring and ultrasonic agitation. System performance was evaluated based on energy consumption and Coefficient of Performance (COP). The results show that the addition of ZnO–SiO₂ nano lubricant improves system performance at optimal concentrations. The highest performance was observed at concentrations of 0.36% and 0.91%, resulting in an energy consumption reduction of approximately 9.7% compared to pure lubricant. The maximum COP value of 2.77 was obtained at a concentration of 0.91%. However, further increases in nanoparticle concentration led to performance degradation due to increased viscosity and particle agglomeration, which negatively affected compressor work and heat transfer. These findings indicate that the application of ZnO–SiO₂ nano lubricant can enhance the energy efficiency of air conditioning systems when applied at optimal concentrations.
Kinetics of Cucurbita Moschata Puree Drying with Maltodextrin as Drying Aid Indah Hartati; Salsa Erna Setiawati; Suwardiyono; Farikha Maharani; Safaah Nur Faizin
Research in Chemical Engineering Vol. 1 No. 1 (2022): Research in Chemical Engineering
Publisher : Universitas Muhammadiyah Purwokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30595/rice.v1i1.7

Abstract

The objective of this research was to investigate the influence of maltodextrin addition of pumpkin puree drying as well as studied the drying kinetics. Several thin layer drying kinetics model comprised of Page, Lewis, Henderson Pabis, Two Term, Weibull as well as diffusion model were used to studied the behavior of pumpkin drying. The puree drying was conducted by added 15% of maltodextrin on pumpkin puree. The drying temperatures were varied of 60-70 The research result show that temperature influence the pumpkin puree drying in which added with maltodextrin as the drying aid. Pumpkin puree drying with addition of maltodextrin performed at temperature of 70 for 150 minutes is considered as the relatively suitable condition as it gives low moisture ratio of 0.07. The thin layer drying kinetics, Midili, give good fittest to the experimental data followed by Page and Weibull. The effective diffusivity is in range of m/s with the obtained activation energy is 30.36 kJ/mol.
BUDIDAYA TANAMAN JAGUNG DI LAHAN TADAH HUJAN UNTUK MENDUKUNG PROGRAM DESA WISATA: Corn Cultivation on Rain-Fed Land to Support the Tourism Village Program Heri Kustanto; Dewi Hastuti; Hasan; M Fatchurrohman; Rony Wijanarko; Ratih Pratiwi; Agus Riyanto; Indah Hartati
ABDIMAS UNWAHAS Vol. 11 No. 2 (2026): Abdimas Unwahas
Publisher : Universitas Wahid Hasyim Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31942/abd.v11i2.17500

Abstract

Sektor jagung Wonogiri peranan penting dalam industri peternakan. Sebagian besar hasil panen dimanfaatkan sebagai bahan baku pakan ternak, yang mendukung rantai pasok unggas dan hewan ternak di wilayah tersebut. Pengabdian kepada masyarakat ini dilakukan pada tanggal 7 Agustus – 7 September 2025 di Desa Kepyar, Kecamatan Purwantoro, Kabupaten Wonogiri, Provinsi Jawa Tengah. Metode yang dipakai dalam kegiatan ini ialah penyuluhan dan demonstasi plot pada budidaya tanaman jagung dillahan beberapa petani di desa tersebut. Budidaya jagung dan tanaman pelengkap lainnya dalam konteks desa wisata merupakan strategi yang ampuh untuk mendorong agribisnis berkelanjutan. Dengan mengubah pemanfaatan lahan, beralih dari sekadar lokasi produksi menjadi ruang rekreasi dan edukasi dan para petani dapat menghasilkan nilai ekonomi yang signifikan sekaligus melestarikan lingkungan perdesaan. Inisiatif agrowisata berbasis budidaya jagung dan sayuran menciptakan efek pengganda bagi masyarakat setempat, yaitu: (1) Aspek ekonomi dengan meningkat pendapatan petani, (2) Aspek Sosial ayitu terciptanya peluang kerja baru bagi kelompok pemuda (Karang Taruna) dan kelompok pemberdayaan perempuan (PKK) dan (3) Aspek lingkungan yaitu dengan mendorong penerapan praktik pertanian yang ramah lingkungan yang  mempunyai daya tarik utama bagi agrowisata.  
Co-Authors Agung Nugroho Agus Riyanto Farikha Maharani Fatna Nur Hidayah Hasan Kofi Ampomah Benefo M Fatchurrohman Muhammad Alaik Amirullah Ratih Pratiwi Rony Wijanarko Safaah Nurfaizin Salsa Erna Setiawati Suwardiyono Tabah Priangkoso