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This book compares and explains the basic mechanisms, energy efficiency, operating costs, adaptability to installation environments, environmental impact, and maintainability of water-cooled and air-cooled air conditioners. Water-cooled types are highly efficient and economical in the long term, but require a water source and initial investment. Air-cooled types are easy to install but are less efficient. It is important to understand the characteristics of both types and make the appropriate choice based on the usage environment and operating conditions.

This article explains the legal definitions of groundwater and well water, the current state of industrial use, related laws and regulations, and procedures and precautions for use. It also quantitatively analyzes the advantages and disadvantages of groundwater use and introduces environmentally friendly, sustainable methods of use and advanced examples of initiatives. It comprehensively discusses the importance and challenges of groundwater use in aiming to simultaneously reduce costs and environmental impact in factory operations.

Well water air conditioning systems are a technology that utilizes the stable temperature of groundwater to achieve highly efficient heating and cooling. Compared to conventional systems, the COP is two to three times higher, and power consumption can be significantly reduced. Although the initial investment is high, it can be recovered in about five to eight years, and large economic benefits can be expected in the long term. With a low environmental impact, it is attracting attention as a sustainable air conditioning solution.