| Energy saving and emission reduction is the theme of today’s social development,which is of great significance for solving energy problems and environmental pollution problems.The recovery of ship exhaust heat is a key research aspect of energy saving and emission reduction,which has attracted the attention of shipbuilding and shipping industry all over the world.Thermoelectric generation technology has the advantages of simple structure,no moving parts,no pollution,etc.It has great potential in the field of the recovery of exhaust heat.This paper aims at optimizing a thermoelectric generation device used for the recovery of ship exhaust heat combined with oscillating heat pipe.The main work is as follows:(1)Theoretical modeling of the thermoelectric generation device;(2)Obtain unavailable parameters in theoretical model through experiments and fitting,including performance parameters related to thermoelectric generation and performance parameters related to oscillating heat pipes;(3)According to the theoretical modeling,calculate and analyze the effects of relevant design parameters on the total output power and average output power of the thermoelectric generation device under the set operating conditions;(4)According" to the analysis results,the optimal structure of the thermoelectric generation device under the set operating conditions is determined.The calculation results show that:(1)For a thermoelectric generation device with one layer of TEG arranged on one side,as the number of modules increases,the total output power increases.Under common operating conditions,with increase of 1 module,the total output power increased by 6.6W,above 82%on average.(2)For a thennoelectric generation device with 6 thermoelectric modules and one side arranged TEG,under the set operating conditions,as the number of layers arranged TEG increases,the total output power of the thermoelectric generation device does not increase much,or even decreases.Under common operating conditions,the total output power of the 1-layer TEG device is 41.04W,the 2-layer TEG device is 42.48W,and the 3-layer TEG device is 38.82W.(3)For low-flow exhaust gas,the number of layers arranged TEG should be as few as possible of the thermoelectric generation device.For large-flow exhaust gas,the number of layers arranged TEG can be appropriately increased.(4)Under the set operating conditions,the performance of the thermoelectric generation device with one side of TEG is better than that of the thermoelectric generation device with two side of TEG.For 6 thermoelectric modules,and one layer of TEG is arranged,the maximum output power of the TEG on two sides is 46.33W,and the maximum total output power of the TEG on one side is 46.68W,The difference between the two is not big.The maximum average output power of the TEG on two sides is 1.93W,and that on one side is 3.89W,an increase of 1.96W,which is about doublcd.The maximum thermoelectric efficiency of device of two-sides TEG is 2.58%,That of device of one-side TEG is 3.6%,an increase of 1%. |
