Hey, I was able to fix a few things to update this to 0.18.*
• Updated info.json with Factorio Version 0.18, Preheated Exchanger 0.0.2, and description.
• North/East/South/West orientation visual heatpipe connection now fixed.
• Icon Size fixed and now shows up in Crafting window, Inventory, and in Tech-Tree as unlock for Nuclear Power.
• "flags = {"goes-to-quickbar"}," removed; depreciated.
• Added I/O resource fluid filters, only steam can be used as the fluid inputs and outputs.
• Added "min_working_temperature = 500," and "minimum_glow_temperature = 350,"
• Added a snazzy thumbnail.png

If the mod author or anyone else would like the updated modpack, give me a shout.