Photovoltaic thermal (PVT) collectors directly convert solar radiation into electrical and thermal energy. A PVT collector combines the functions of a PV panel and a flat plate solar collector. The development of PVT air collectors is a very promising research area. At present, PVT air collectors are used in solar drying and solar air heaters. On the basis of existing literature, most PVT air collectors were built by using monofacial PV modules. The bifacial PV modules had two active surfaces that could capture solar radiation with its front and rear surfaces. Additional sunlight absorption through both surfaces resulted in an enhanced electrical power generation compared with the conventional monofacial PV. Therefore, bifacial PVT was considered to be useful and attractive due to its potential of enhancing overall system performances, including energy and exergy efficiencies. Findings of this review indicated that PVT air collector with bifacial solar cell produced a larger amount of electrical energy, which was approximately 40% higher than a monofacial PVT. The energy and exergy efficiencies of PVT air collector with monofacial solar cells range from 27% to 94% and from 4% to 18%, respectively. For bifacial PVT, the energy and exergy efficiencies of PVT air collector range from 28% to 67% and from 8.2% to 8.4%, respectively.
Renewable energy had been monopolized the research area in these past decade up till nowadays, due to its reliability and future in global production of electrical and thermal energy. Narrowing down the scope to the photovoltaic thermal (PVT) system, lots of improvements had been implied both theoretically and experimentally. One of the most attractive applications of PVT water or air-based collectors is building integrated photovoltaic thermal (BIPVT) system, which has undergone rapid developments in recent years. This review paper comprises the research findings on the improvements that had been integrated by PVT systems as well as well as personal and cited remarks on advancements on cooling techniques on PVT system.
In flood-prone areas, coordination between parties in disaster risk reduction (DRR) activities is very important. This is because the consequences of disasters will directly affect the disruption of people's lives and livelihoods, and also hinder the process of sustainable development. The study aims to develop a public coordinating scheme for disaster risk reduction (DRR) activities based on public resources in Gorontalo Regency. Public resources from government agencies and society are available in Gorontalo Regency with their respective tasks at the stages before, during and after the disaster. Public coordination is expected to support the implementation of DRR-based sustainable development in Gorontalo Regency. The preparation of public coordination scheme begins with geospatial flood hazard assessment based on the characteristics of the Limboto Watershed using a Geographic Information System (GIS) tool. The result provides a basis for the implementation of public coordination arrangements for DRR. Gorontalo Regency is dominated by a coastal land parcel adjacent to Tomini Bay, stretching from lowland plains to hilly mountains. High rainfall, critical land use and settlements in the lowlands have caused the study area categorized into high- to very high-risk zones of flooding. To ensure sustainable development runs effectively, its implementation must be based on DRR policy with public coordination. Public coordination is carried out between government agencies and society, who cooperate in compliance with their respective roles and tasks at the stage before, during and after the disaster. The results show that the involvement of more sectoral parties is needed at the stage before and during the disaster. This indicates that public coordination before the disaster performs risk prevention and reduction activity that should be prioritized in the implementation of development before inhibiting its sustainability.
Penelitian ini bertujuan untuk menganalisis kesesuaian iklim pada daerah penelitian yaitu Kabupaten Bone Bolango di Provinsi Gorontalo dengan beberapa komoditi tanaman perkebunan. Data iklim yang digunakan dalam penelitian ini merupakan data sekunder yang bersumber dari TRMM, NASA dan BMKG yang diakses secara daring (online). Adapun data yang diakses diantaranya adalah data curah hujan, suhu (temperatur udara), kecepatan angin, dan kelembaban nisbi. Hasil pengolahan dari data-data tersebut selanjutnya dianalisis dan mendapatkan hasil rata-rata curah hujan tahunan (mm/tahun) di lokasi penelitian diketahui berkisar antara 1.301 mm/tahun hingga 1.758 mm/tahun. Suhu (temperatur udara oC) rata-rata sebesar 24,04 oC, kecepatan angin (knot) rata-rata adalah sebesar 2 knot atau 3,704 km/jam, dan kelembaban nisbi (%) rata-rata hingga 79,8%. Hasil tersebut disesuaikan (matching) dengan beberapa tanaman perkebunan perihal syarat tumbuhnya dengan menggunakan kriteria diantaranya S1: Paling sesuai; S2: Cukup sesuai; S3: Sesuai marginal dan N: Tidak sesuai. Diketahui bahwa beberapa tanaman perkebunan yang cocok dibudidayakan pada daerah penelitian adalah Kelapa, Kakao, Kopi, Sawit, Cengkeh, Kemiri, Kayu manis, Vanili, dan Karet.
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