Experimental Investigation and Performance Analysis of a Flat-Plate Solar Water Heating System for Domestic
家庭用平板型太陽熱温水システムの実験的調査と性能分析 (AI 翻訳)
Rotiwale P
🤖 gxceed AI 要約
日本語
インド・カルナードで2m²の平板型太陽熱集熱器と200Lタンクを備えたシステムを12ヶ月間実験し、傾斜角と流量が効率に与える影響を評価。30度傾斜で年間平均4.52MJ/日の有効熱量、47.5%の効率を達成し、流量0.020kg/sで最適な出口温度58.4°Cを得た。ライフサイクルコスト分析では、LPG価格で1年未満の回収期間、20年間の費用便益比12.3を示した。
English
A 12-month experimental study of a flat-plate solar water heating system in Karad, India, evaluated tilt angles and flow rates. The 30° tilt achieved 4.52 MJ/day annual useful heat gain with 47.5% efficiency, and 0.020 kg/s flow gave optimal outlet temperature (58.4°C). Life-cycle cost analysis shows payback under one year at current LPG prices and a benefit-cost ratio of 12.3 over 20 years.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
日本では太陽熱温水器の新規導入は限定的だが、再エネ熱利用の促進や脱炭素住宅の観点で参考になる。特に、地域の日射条件に応じた最適傾斜角の実証データは、日本の気候風土に合わせた設計に応用可能。
In the global GX context
This study provides empirical evidence on solar thermal performance in a tropical climate, relevant to global efforts to decarbonize residential energy use. The payback analysis and tilt optimization offer practical insights for regions with similar solar resources, contributing to the broader energy transition literature.
👥 読者別の含意
🔬研究者:Provides experimental data and validation of HWB and F-chart models for solar water heating systems in tropical climates.
🏢実務担当者:Offers design guidance on optimal tilt angle and flow rate for maximizing efficiency and economic returns in solar water heating installations.
🏛政策担当者:Demonstrates the economic viability of solar water heaters, supporting policies that incentivize renewable heat adoption.
📄 Abstract（原文）
Solar water heating systems represent one of the most technically mature and economically attractive applications of solar thermal energy, offering significant potential for displacing fossil fuel consumption in the domestic water heating sector — which accounts for approximately 18 percent of total residential energy use in India. This paper presents a comprehensive experimental investigation of a 2 m² flat-plate solar water collector coupled to a 200-litre insulated storage tank, installed at Karad, Maharashtra (latitude 17.27°N), over a twelve-month monitoring period from May 2025 to April 2026. The study systematically evaluates the effect of three collector tilt angles (15°, 30°, and 45° from horizontal) and five mass flow rates (0.010 to 0.060 kg/s) on collector thermal efficiency, useful heat gain, and outlet water temperature. The Hottel-Whillier-Bliss (HWB) model and the F-chart method are applied for theoretical performance prediction and validation against experimental data. Results show that the 30° tilt angle provides maximum annual useful heat gain (4.52 MJ/day annual average, 47.5% collector efficiency) — closely matching the site latitude — and that a mass flow rate of 0.020 kg/s provides the optimal balance of outlet temperature (peak 58.4°C) and system energy delivery. Monthly performance data confirm that the system achieves the target outlet temperature of 55°C on 218 days of the year. Life cycle cost analysis demonstrates a simple payback period of less than one year at current LPG prices, with a benefit-cost ratio of 12.3 over 20 years, establishing strong economic justification for solar water heater adoption in the region
🔗 Provenance — このレコードを発見したソース
- Zenodo https://zenodo.org/records/21903927first seen 2026-08-13 04:36:36
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