Improvement in the efficiency of the solar powered refrigerator | |
| Author | Somchart Soponronnarit |
| Call Number | AIT Thesis no. 1254 |
| Subject(s) | Solar energy research Refrigerators |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering of the Asian Institute of Technology, Bangkok, Thailand |
| Publisher | Asian Institute of Technology |
| Abstract | The work described in this thesis was a continuation of work on a small solar powered intermittent ammonia-water absorption refrigerator initiated by EXELL and KORNSAKOO and developed by JARIMOPAS at the Asian Institute of Technology. The yield of ammonia during regeneration was improved by four modifications. First, a mirror was used to increase solar radiation falling on the collector. Second, the cooling water tank was kept cool by insulation du ring the day and exposure at night; this reduced the condensation pressure. Third, the condensation pressure was also reduced by using a condenser. Fourth, a check valve was inserted in the absorption line to provide complete utilization of equa-ammonia. Moreover, refrigeration was improved by using a double pipe heat exchanger with the expansion valve and evaporator coil. The unit tested had 1.44 m2 flat plate solar collector containing 18.7 kg of aqua-ammonia. The work described in this thesis was a continuation of work on a small solar powered intermittent ammonia-water absorption refrigerator initiated by EXELL and KORNSAKOO and developed by JARIMOPAS at the Asian Institute of Technology. The yield of ammonia during regeneration was improved by four modifications. First, a mirror was used to increase solar radiation falling on the collector. Second, the cooling water tank was kept cool by insulation during the day and exposure at night; this reduced the condensation pressure. Third, the condensation pressure was also reduced by using a condenser. Fourth, a check valve was inserted in the absorption line to provide complete utilization of equa-ammonia. Moreover, refrigeration was improved by using a double pipe heat exchanger with the expansion valve and evaporator coil. The unit tested had 1.44 m2 flat plate solar collector containing 18.7 kg of aqua-ammonia. On a bright day 3.47 kg of liquid ammonia were obtained and 6.405 kg of ice was produced. A volume of about 50 dm3 partly filled with fruit was kept cool by the ice. |
| Type | Thesis |
| School | Student Research Before 1979 |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Thesis (Year <=1979) |
| Chairperson(s) | Exell, Robert H.B. |
| Examination Committee(s) | Singh, Gajendra ;Jindal, Vinod Kumar |
| Scholarship Donor(s) | Government of United Kingdom |
| Degree | Thesis (M.Eng) - Asian Institute of Technology, 1977 |