Tyas, MartinaW (2014) Analisis Nomografi Suhu, Laju Penguapan Dan Tekanan Udara Untuk Perancangan Alat Desalinasi Tenaga Surya Dengan Pengaturan Vakum. Sarjana thesis, Universitas Brawijaya.
Abstract
Water clean crisis is quite prominent throughout previous years in many regions of Indonesia. The distribution of clean water is not satisfying the demand of population for water, precisely during long dry season. Industrial demand for water is also great because natural resource is very scarce mainly in regions without adequate water source throughout a year. Coastal area may be still safe because of the abundance of seawater. Seawater desalination technology is, therefore, a possible way to supply high production of freshwater. However, cheaper energy is an important matter and thus, solar-based seawater desalination device is manufactured to utilize solar energy as main heat source for evaporation. The objectives of research are (1) to produce a relationship between solar radiation intensity and seawater temperature change rate in various air pressures and (2) to obtain a relationship between seawater temperature and seawater evaporation rate in various air pressures. Research is conducted on March 2012 at Engineering Laboratory of Natural Resource and Environment of University of Brawijaya. Research involves two treatments which are the evaporation of 30 liters seawater and the evaporation of 40 liters sweater. Each treatment has three observations at pressure rates of -5, -7, 5, and -10 CmHg. Each observation is made for three hours in a day, and data are collected at 10.00, 11.00, 12.00, and 13.00. Parameters measured in this research are evaporation rate (ml/hour), solar heat energy (KJ), temperature (0C), energy during evaporation (KJ), evaporation efficiency (%) and solar radiation intensity (W/m2). Result of research indicates that solar radiation intensity remains between 591 W/m2 and 680 W/m2 while solar heat energy develops between 1263.83 KJ-1636.08 KJ. Average temperature in the desalination device is 34.950C for 30 liters volume and 34.330C for 40 liters volume. Average evaporation rate in the desalination chamber is 169.86 ml/hour for 30 liters volume and 161.37 ml/hour for 40 liters volume. Average temperature is 34.950C for 30 liters volume and 34.330C for 40 liters volume. The energy required for daily average evaporation is 430 KJ for 30 liters volume and 556 KJ for 40 liters volume. The efficiency of evaporation reaches 2.29 % for 30 liters volume at pressure -7 CmHg. The relationship between solar radiation intensity, seawater temperature change rate, and seawater evaporation rate is perpendicular. Higher solar radiation intensity may cause higher sweater temperature change rate and greater evaporation rate.
English Abstract
Water clean crisis is quite prominent throughout previous years in many regions of Indonesia. The distribution of clean water is not satisfying the demand of population for water, precisely during long dry season. Industrial demand for water is also great because natural resource is very scarce mainly in regions without adequate water source throughout a year. Coastal area may be still safe because of the abundance of seawater. Seawater desalination technology is, therefore, a possible way to supply high production of freshwater. However, cheaper energy is an important matter and thus, solar-based seawater desalination device is manufactured to utilize solar energy as main heat source for evaporation. The objectives of research are (1) to produce a relationship between solar radiation intensity and seawater temperature change rate in various air pressures and (2) to obtain a relationship between seawater temperature and seawater evaporation rate in various air pressures. Research is conducted on March 2012 at Engineering Laboratory of Natural Resource and Environment of University of Brawijaya. Research involves two treatments which are the evaporation of 30 liters seawater and the evaporation of 40 liters sweater. Each treatment has three observations at pressure rates of -5, -7, 5, and -10 CmHg. Each observation is made for three hours in a day, and data are collected at 10.00, 11.00, 12.00, and 13.00. Parameters measured in this research are evaporation rate (ml/hour), solar heat energy (KJ), temperature (0C), energy during evaporation (KJ), evaporation efficiency (%) and solar radiation intensity (W/m2). Result of research indicates that solar radiation intensity remains between 591 W/m2 and 680 W/m2 while solar heat energy develops between 1263.83 KJ-1636.08 KJ. Average temperature in the desalination device is 34.950C for 30 liters volume and 34.330C for 40 liters volume. Average evaporation rate in the desalination chamber is 169.86 ml/hour for 30 liters volume and 161.37 ml/hour for 40 liters volume. Average temperature is 34.950C for 30 liters volume and 34.330C for 40 liters volume. The energy required for daily average evaporation is 430 KJ for 30 liters volume and 556 KJ for 40 liters volume. The efficiency of evaporation reaches 2.29 % for 30 liters volume at pressure -7 CmHg. The relationship between solar radiation intensity, seawater temperature change rate, and seawater evaporation rate is perpendicular. Higher solar radiation intensity may cause higher sweater temperature change rate and greater evaporation rate.
| Item Type: | Thesis (Sarjana) |
|---|---|
| Identification Number: | SKR/FTP/2014/169/051403159 |
| Subjects: | 300 Social sciences > 338 Production > 338.1 Agriculture |
| Divisions: | Fakultas Teknologi Pertanian > Keteknikan Pertanian |
| Depositing User: | Budi Wahyono Wahyono |
| Date Deposited: | 12 Jun 2014 08:34 |
| Last Modified: | 22 Oct 2021 06:42 |
| URI: | http://repository.ub.ac.id/id/eprint/149555 |
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