Consider this: quite powerful solar thermal generators [1] and furnaces [2] have been built, which use mirrors to concentrate sunlight. Do they create intense cold at night? No, because you can't focus coldness. The device in the article, and the one described above, depend on shielding a volume from terrestrial heat sources, and are effective only because the heat being transferred is minimized.
[1] https://en.wikipedia.org/wiki/Gemasolar_Thermosolar_Plant
[2] https://en.wikipedia.org/wiki/Odeillo_solar_furnace