Eksperimentalna analiza zajema vode z vodno harfo

Doberdrug, Jure (avtor), Zupančič, Matevž (mentor), Golobič, Iztok (komentor)

Pomanjkanje pitne vode je humanitarni problem, ki prizadene številne regije, zlasti v sušnih območjih. V raziskavi smo obravnavali učinkovitost zajemanja vode iz megle s pomočjo prototipa vodne harfe. Zasnovali smo eksperimentalno komoro z nadzorovanimi pogoji, opremljeno z ultrazvočnimi generatorji megle, ventilatorjem, merilniki vlažnosti ter hitrotekočo video kamero. Analizirane so bile različne konfiguracije harfe, izdelane iz žic premera 0,2 mm in 0,4 mm, z in brez hidrofobnega premaza, v dveh režimih megle. Rezultati kažejo, da večja debelina žice poveča količino zbrane vode za približno 35–40 %, medtem ko hidrofobni premaz zmanjša učinkovitost za 40–50 %. Gostota megle se je izkazala za najpomembnejši dejavnik, saj je pri podvojeni količini proizvedene megle količina zbrane vode skoraj dvakratna. Najvišja zabeležena vrednost je znašala 295 l·m⁻²·dan⁻¹ pri žici premera 0,4 mm brez uporabe hidrofobnega premaza. Pridobljeni rezultati so usmerjeni tako, da omogočajo dodatno delo na tem področju. Prvi smiselni koraki za nadaljnji razvoj bi bili: analiza kakovosti zbrane vode, zbiralni sistem za dreniranje vode iz harfe in preučitev nadaljnjih izboljšav preko kombinacije hidrofilnih in hidrofobnih žic.

• Jezik: Slovenski jezik
• Ključne besede: vodna harfa, zajem vode iz megle, hidrofobizacija, nerjavno jeklo, kontaktni kot, učinkovitost zbiranja vode
• Vrsta gradiva: Magistrsko delo/naloga
• Organizacija: FS - Fakulteta za strojništvo
• Leto izida: 2026
• PID: 20.500.12556/RUL-179723
• Datum objave v RUL: 21.02.2026

Sekundarni jezik

• Jezik: Angleški jezik
• Naslov: Experimental analysis of water collection with a water harp

Izvleček

The lack of drinking water is a humanitarian problem that affects many regions, especially in arid areas. In our study, we examined the effectiveness of collecting water from fog using a prototype water harp. We designed an experimental chamber with controlled conditions, equipped with ultrasonic fog generators, a fan, humidity meters, and a high-speed video camera. Various harp configurations made of 0.2 mm and 0.4 mm diameter wires, with and without a hydrophobic coating, were analysed in two fog modes. The results show that a greater wire thickness increases the amount of water collected by approximately 35–40%, while a hydrophobic coating reduces efficiency by 40–50%. Fog density proved to be the most important factor, as the amount of collected water is almost double when the amount of fog produced is doubled. The highest recorded value was 295 l·m⁻²·day⁻¹ for a wire diameter of 0.4 mm without the use of a hydrophobic coating. The results obtained are oriented in such a way as to enable further work in this area. The first steps for further development would include: analysis of the quality of the collected water, a collection system for draining water from the harp, and further improvements with combination of hydrophilic and hydrophobic wires.

• Ključne besede: water harp, water harvesting from fog, hydrophobization, stainless steel, contact angle, water collection efficiency