Change the construction of the $lunTab something like this
$lunNAA='naa.60050768011083af1800000000000071','naa.60050768011083af1800000000000072'
$lunTab= @{}
Get-VMHost-Name$esxName|Get-ScsiLun-LunTypedisk|
where{$lunAAA-contains$_.CanonicalName}
$lunTab.Add($_.CanonicalName,$_.ConsoleDeviceName)
}