I know antifreeze works by lowering the freezing point, but does it also carry heat more effectively than straight water? Driving a diesel in the winter, I'm way more concerned with getting the coolant temp up rather than keeping it down.

Thanks in advance for answering a noob question!

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RIP:
2011 E350 BlueTEC, Schwartz 81k (totaled by uninsured drunk driver)
1964 Unimog 404.1 (wrongfully towed by the city)
1994 E320, Brilliantsilber 208k (transmission shuffled off after sudden catastrophic fluid loss)
1982 300D, Silberblau under a blue repaint 256k (sold for parts)
1995 E320 Polarweiss, 131k (sold for parts)
1995 E300D Polarweiss, 287k (totaled by drunk driver)