PROBLEM TO BE SOLVED: To save electricity necessary for securing water temperature suitable for breeding seafood and reduce running cost.SOLUTION: A heat exchange type water tank 10 includes a cylindrical outer wall 22 and a cylindrical bulkhead 24. An area between the outer wall 22 and the bulkhead 24 forms an annular heat medium water area 28 of a fixed width, and an area between the bulk head 24 and a pillar 26 forms an annular breeding water area 30 of a fixed width larger than the width of the heat medium water area 28. By the heat exchange between the breeding water area 30 and the heat medium water area 28 that face each other across the bulkhead 24, the water temperature of the breeding water area 30 can be changed. Underground water pumped up from an underground constant temperature layer is injected into the heat medium water area 28, and is used as a cooling medium to lower the water temperature in the breeding water area 30.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2016,JPO&INPIT【課題】魚介類の飼育に適した水温を確保するために必要な電気の省力化とランニングコストの低減を図る。【解決手段】熱交換式水槽10は円筒形の外壁22と隔壁24を備え、外壁22と隔壁24の間の領域は一定幅の環状の熱媒体水域28を形成し、隔壁24と柱26の間の領域は熱媒体水域28の幅より大きい一定幅の環状の飼育水域30を形成し、隔壁24を挟んで対峙する飼育水域30と熱媒体水域28との間における熱交換により飼育水域30の水温を変化させることができる。熱媒体水域28には地下恒温層より汲み上げた地下水を注入し、飼育水域30内の水温を下げる冷媒として用いる。【選択図】図1
