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IMPLEMENTASI PLTMH UNTUK MENDUKUNG GREEN TECHNOLOGY DI DUSUN PETAPAN KLUNGKUNG I Made Anom Adiaksa; I Ketut Suherman; Achmad Wibolo
Dharma: Jurnal Pengabdian Masyarakat Vol 1, No 2 (2020): November
Publisher : Universitas Pembangunan Nasional "Veteran" Yogyakarta

The area of Petapan Hamlet is an upstream area where there are still many water sources as the main flow for downstream irrigation. There is one secondary stream with a fairly large channel size (2 m wide and 1 m deep). The flow velocity of this channel averages 1.6 m / sec with an average water depth in the dry season of 40 cm. The relatively large size of the channel results in a water flow of 1.26 liters / second. There is one place where the dimension of the channel shrinks for the distribution of irrigation to a width of 1 meter so that the correlation with a steady flow rate will increase. The people of Petapan Hamlet have built a tourism area based on green tourism with educational tourism as the main point. This tourism area is traversed by the subak water channel which will later be used as a place to play and educational tours about the subak irrigation system for tourists visiting this place. There is no supporting infrastructure in developing this tourism, both facilities and supporting facilities for the convenience of tourists in carrying out their activities The energy source that will be used to support the development of educational tourism is obtained from PLN sources. Lack of knowledge of the tourism community based on green tourism green technology (environment-based energy) which can be used as educational tourism In 2019, a micro hydro generator in the form of a waterwheel has been built with an output power of 7000 kg / cm2. This power is obtained from the encouragement of water flow when it touches the blade of the wheel. This power is relatively large if it can be transmitted to generators. Problems that arise related to large power are small rotations. From the mill, the maximum rotation produced is 15 rpm. Making the rotation conversion by means of pulley reduction and gearbox resulting in a rotation of 1500 rpm. This obstacle is overcome by utilizing a DC type generator to lighten rotation and losses due to friction with 500 watts of power.

Analysis of the Selection and Installation of a Pump for an Overflow Swimming Pool with a Volume of 67 Cubic Meters Achmad Wibolo; I Ketut Suherman; I Dewa Made Pancarana; I Ketut Adi
Logic : Jurnal Rancang Bangun dan Teknologi Vol. 23 No. 2 (2023): July
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/logic.v23i2.138-146

In the swimming pool there is a pump system that is useful for circulating water. Pumps in swimming pools can affect water quality. Dirty water will be cleaned by the filter and will be re-circulated to the swimming pool. The calculations that must be known are the volume of the swimming pool, pump power, flow rate, and the curve of the pump. In order for the selection of a swimming pool pump to be appropriate, the correct calculation must be made so that the pump can provide the best performance for a swimming pool with a volume of 67 cubic meters and is able to circulate swimming pool water 4 times during 12 working hours.

IMPLEMENTASI PLTMH UNTUK MENDUKUNG GREEN TECHNOLOGY DI DUSUN PETAPAN KLUNGKUNG Adiaksa, I Made Anom; Suherman, I Ketut; Wibolo, Achmad
Dharma: Jurnal Pengabdian Masyarakat Vol. 1 No. 2 (2020): November
Publisher : Universitas Pembangunan Nasional "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/dlppm.v1i2.4055

The area of Petapan Hamlet is an upstream area where there are still many water sources as the main flow for downstream irrigation. There is one secondary stream with a fairly large channel size (2 m wide and 1 m deep). The flow velocity of this channel averages 1.6 m / sec with an average water depth in the dry season of 40 cm. The relatively large size of the channel results in a water flow of 1.26 liters / second. There is one place where the dimension of the channel shrinks for the distribution of irrigation to a width of 1 meter so that the correlation with a steady flow rate will increase. The people of Petapan Hamlet have built a tourism area based on green tourism with educational tourism as the main point. This tourism area is traversed by the subak water channel which will later be used as a place to play and educational tours about the subak irrigation system for tourists visiting this place. There is no supporting infrastructure in developing this tourism, both facilities and supporting facilities for the convenience of tourists in carrying out their activities The energy source that will be used to support the development of educational tourism is obtained from PLN sources. Lack of knowledge of the tourism community based on green tourism green technology (environment-based energy) which can be used as educational tourism In 2019, a micro hydro generator in the form of a waterwheel has been built with an output power of 7000 kg / cm2. This power is obtained from the encouragement of water flow when it touches the blade of the wheel. This power is relatively large if it can be transmitted to generators. Problems that arise related to large power are small rotations. From the mill, the maximum rotation produced is 15 rpm. Making the rotation conversion by means of pulley reduction and gearbox resulting in a rotation of 1500 rpm. This obstacle is overcome by utilizing a DC type generator to lighten rotation and losses due to friction with 500 watts of power.

Analysis of the Selection and Installation of a Pump for an Overflow Swimming Pool with a Volume of 67 Cubic Meters Achmad Wibolo; I Ketut Suherman; I Dewa Made Pancarana; I Ketut Adi
Logic : Jurnal Rancang Bangun dan Teknologi Vol. 23 No. 2 (2023): July
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/logic.v23i2.138-146

In the swimming pool there is a pump system that is useful for circulating water. Pumps in swimming pools can affect water quality. Dirty water will be cleaned by the filter and will be re-circulated to the swimming pool. The calculations that must be known are the volume of the swimming pool, pump power, flow rate, and the curve of the pump. In order for the selection of a swimming pool pump to be appropriate, the correct calculation must be made so that the pump can provide the best performance for a swimming pool with a volume of 67 cubic meters and is able to circulate swimming pool water 4 times during 12 working hours.

Possibility of using immersion cooling technology with virgin coconut oil for split-type AC Achmad Wibolo; I Wayan Temaja; Ida Bagus Gde Widiantara; Made Ery Arsana; M. Yusuf
SINERGI Vol. 30 No. 2 (2026)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/sinergi.2026.2.012

Conventional split-type air conditioners are limited by high electrical consumption, noise from cooling fans, and bulky condenser coils that restrict installation flexibility. However, the application of immersion cooling in household AC systems remains largely unexplored. This study investigates the feasibility of using Virgin Coconut Oil (VCO) as a dielectric fluid for immersion cooling to improve energy efficiency and thermal performance. An experimental setup was developed using 20 L of SNI-compliant VCO, with the outdoor unit modified for immersion operation. Key performance parameters, including condenser coil and evaporator coil temperatures and the Coefficient of Performance (COP), were measured. Results showed condenser coil temperatures ranging from 40 °C to 58 °C and evaporator coil temperatures between 6 °C and 11 °C. The system achieved an average COP of 4.65 and reduced electrical consumption by approximately 20 %, indicating significant energy savings without compromising cooling efficiency. VCO also demonstrated suitable dielectric properties, with a breakdown voltage of 29.17 kV, near the IEC 156 threshold. These findings highlight immersion cooling with VCO as a promising, quiet, and energy-efficient alternative for household air conditioners. Further work is recommended to assess long-term reliability under varying operational conditions.

Experimental comparison of thermoelectric and water-spray cooling for solar PV performance in South Badung, Bali, Indonesia I Kadek Ervan Hadi Wiryanta; Achmad Wibolo; Ketut Bangse; I Nyoman Gede Baliarta; I Wayan Temaja
Jurnal Polimesin Vol 24, No 4 (2026): August
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v24i4.9091

Elevated operating temperature can reduce the electrical performance and efficiency of photovoltaic (PV) modules, particularly under tropical outdoor conditions. This study experimentally compared thermoelectric cooling (TEC) and water-spray cooling for improving the thermal and electrical performance of polycrystalline PV modules under the same outdoor conditions in South Badung, Bali, Indonesia. Identical 160 Wp PV modules were tested under three conditions: without cooling, with TEC cooling, and with water-spray cooling. Surface temperature, electrical output, efficiency, cooling effectiveness, and net energy gain were evaluated during a 120-minute experiment with measurements recorded at 5-minute intervals. The results showed that the uncooled PV module reached surface temperatures of approximately 45–55°C. TEC reduced the surface temperature by approximately 5–7°C, whereas water-spray cooling reduced it by approximately 15–20°C, resulting in temperatures of 30–37°C. The water-spray system achieved an average output power of 112.37 ± 17.29 W and efficiency of 23.39 ± 3.49%, compared with 98.07 ± 11.96 W and 20.42 ± 2.37%, respectively, for TEC cooling. The net energy gain was approximately −2.39 W for TEC and 19.09 W for water-spray cooling under intermittent operation. These results indicate that water-spray cooling provided better thermal management and net energy performance than TEC under the investigated tropical conditions.

Analisis Energi Listrik Hasil Pemanfaatan Buangan Panas Superheat Air Conditioner Menggunakan Thermoelectric Generator dengan Variasi Modul TEG I Dewa Made Pancarana; Achmad Wibolo; I Ketut Suherman; I Nengah Ardita
Jurnal Teknologi Vol 26, No 2 (2026): Agustus 2026
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v26i2.9724

The thermoelectric generator combined with the superheat air conditioner experiences differences. the results of the design and construction of a thermoelectric generator (TEG) based electrical energy generation system has been used to utilizes waste heat from superheat air conditioner (AC) between the compressor and condenser. This system uses an aluminum plate measuring 20 cm long, 8 cm wide and 0.8 cm thick which has been modified with five ¼ inch pipe grooves to accommodate the TEG and store heat. The cooling system used is heatsink measuring 20 cm long, 8 cm wide, and fin thickness 0.2 cm. Testing was carried out using TEG type SP-1848-27145 SA connected in series with variations of 2, 6 and 10 modules, with a combination of condensate water cooler and fan on the heatsink. The measurement results show that 2 TEGs produce electrical energy of 1898 mV, 26 mA, and 51,07 mW of power at ΔT 34.4°C; 6 TEGs produce 2747 mV, 13,5 mA, and 371,601 mW of power at ΔT 35.5°C; and 10 TEGs produce the highest electrical energy of 2681 mV, 15,1 mA, and 405,024 mW of power at ΔT 34.5°C. These results indicate that increasing the number of TEG modules provides an increase in the electrical energy produced.

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