THE STUDY OF A NEW HIGH-EFFICIENCY EXHAUST HEAT RECOVERY TANK STRUCTURE USED IN THE DISTILLATION SYSTEM OF FRESH WATER FROM SEA WATER
With more than 30 % of engine heat energy lost to exhaust gas, using exhaust waste heat to generate useful work is considered one of the effective and potential solutions to increase the engine’s fuel efficiency. In the research and development of a system that utilizes exhaust heat and engine coolant to distill fresh water from sea water using an exhaust heat recovery tank, the exhaust heat recovery efficiency can reach 30 %. However, there is still a large amount of heat that cannot be recovered because the exhaust gas stream at the center of the heat recovery tank still has a relatively high temperature. To solve this problem, this paper will research and propose a new structure of the waste gas heat recovery tank with a radial channel to increase the efficiency of waste heat recovery at the center of the tank. The simulation results show that, with a suitable tank structure, the efficiency of waste heat recovery can reach 60 %.
G. Fontana and E. Galloni, “Variable valve timing for fuel economy improvement in a small spark-ignition engine”. Appl Energy, 2009, Volume 86, Issue 1, pp. 96-105.
Bo Zhang and S. Mani Sarathy, “Lifecycle optimized ethanol-gasoline blends for turbocharged engines”. Appl Energy, 2016, Volume 181, pp. 38-53.
Cheolwoong Park, Sungdae Kim, Hongsuk Kim and Yasou Moriyoshi, “Stratified lean combustion characteristics of a spray-guided combustion system in a gasoline direct injection engine”. Energy, 2012, Volume 41, Issue 1, pp. 401-407.
Ertan Alptekin, Huseyin Sanli, Mustafa Canakci, “Combustion and performance evaluation of a common rail DI diesel engine fueled with ethyl and methyl esters”. Applied Thermal Engineering, 2019, Volume 149, pp. 180-191.
Phạm Minh Tuấn, Lý thuyết động cơ đốt trong, 2008, NXB Khoa học và Kỹ thuật.
Tao Zhang, at el, “Thermo-economic analysis and optimization of ICE-ORC systems based on a splitter regulation”. Energy, 2021, Volume 226.
Vaclav Novotny, at el, “Direct integration of an organic Rankine cycle into an internal combustion engine cooling system for comprehensive and simplified waste heat recovery”. Energy Reports, 2021, Volume 7, pp. 644-656.
Pablo Fernandez-Yanez, at el, “Thermal analysis of a thermoelectric generator for light-duty diesel engines”. Applied Energy, 2018, Volume 226, pp. 690-702.
Enhua Wang, et al, “Performance analysis of a multilayer thermoelectric generator for exhaust heat recovery of a heavy-duty diesel engine”. Applied Energy, 2020, Volume 274.
Khổng Vũ Quảng và các cộng sự, “Nghiên cứu nâng cao hiệu suất thu hồi nhiệt khí thải của động cơ đốt trong”. Tạp chí Cơ khí Việt Nam, 2021, số đặc biệt 12/2021.
Khổng Vũ Quảng và các cộng sự, “Nghiên cứu và đánh giá ảnh hưởng của cấu trúc ống thu hồi nhiệt khí thải đến hiệu quả tận dụng nhiệt trong hệ thống chưng cất nước ngọt từ nước biển”. Tạp chí Khoa học và Công nghệ, 2020, số 145/2020.
K.V. Quang, at el, “Developing a waste heat recovery tube used in the seawater distillation system”. Applied Thermal Engineering, 2021, Volume 195.