Review of several ground source heat pump systems
The direct use of underground well water source heat pump system: its greatest advantage is very economical, small footprint, but we must pay attention to the following conditions must be met: good water quality; rich water; meet the standards. Ground-source heat pump system buried underground: For vertical buried pipe system, its advantages are: smaller land occupation, pipe and pump less power, the disadvantage is the higher drilling costs; for horizontal buried pipe system, its Advantages are: installation costs lower than the vertical buried pipe system, widely used, the user easy to grasp, the disadvantages are: large area, affected by the ground temperature, the pump power consumption. Surface water heat pump: its advantages are: at 10 meters or deeper in the lake, providing 10 ℃ direct cooling, investment than underground buried pipe system is small, low energy consumption of pumps, high reliability, low maintenance requirements, low Operating costs, in warm areas, the lake can be used as a heat source, the disadvantages are: In shallow lakes, the coil is easily damaged, due to larger water temperature changes, will reduce the unit's efficiency. Boiler / cooling tower and underground buried pipe combination of hybrid ground source heat pump system: suitable for small space, can not be used alone underground heat exchange system building, cooling tower and closed-loop system combined with refrigeration, saving costs; proved The system is efficient and low cost.
Jewelry Polishing Machine
A jewelry polishing machine is a machine specially used for polishing and cleaning jewelry. It usually uses abrasive tools such as grinding wheels or brushes to polish the surface of jewelry to make the surface smooth and bright, and improve its texture and aesthetics.
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â—Improve the aesthetics of jewelry: Jewelry polishing machine can polish the surface of jewelry to make the surface smoother, smoother and brighter, and improve its aesthetics and texture.
â—Improve the value of jewelry: the surface of polished jewelry is brighter and the texture is better, which can increase its value and increase the sales price.
â—Improve production efficiency: Polishing jewelry by hand requires time and skill, but using a polishing machine can greatly improve production efficiency, shorten processing time, and increase production efficiency and output.
â—Convenient and easy to use: It is easy to use the jewelry polishing machine, just place jewelry on the machine, and then start the machine for polishing.
â—Protection of jewelry: manual polishing is easy to damage the surface of jewelry, but the proper use of polishing machine can reduce the damage to the surface of jewelry and protect the quality of jewelry.