Specific to the solar water heater
products, First, a common problem in the technical performance: solar water
heater collector element vacuum tube fouling is severe, so that the decline in
the efficiency of the vacuum tube absorbs heat. Although the absorbing film
coating process has been a lot of innovation to improve, but the thermal
resistance of the scale is too large, does not make the vacuum tube collector
efficiency is greatly improved;
Water heater poor circulation lead to
reduction in thermal efficiency. According to the principle of vacuum tube
collector element cycle - the proportion of hot and cold water and convective
circulation, but due to the hot and cold water with a cavity and conduction
causes the tube to the water temperature consistent, and thus the loss of the
use of the temperature difference between hot and cold water cycle power,
combined with the vacuum tube of the reflector, the reflector reflection vacuum
tube backlight surface heat damage cold water downstream channel cycle dead,
destroyed the water heater cycle power, water heater cycle is not Chang, thus
leading to thermal efficiency is greatly decreased
Is not easy to run under pressure. Existing PV inverter water heater collector component of solar vacuum tube diameter pipe,
sealed by a rubber ring and vacuum tube installed in the water heater, the
rubber ring leaking due to the tank hydraulic pressure large or aging of the
rubber ring and vacuum collector tube opening structure, very large vacuum tube
to withstand the water pressure, water pressure tank bracket overwhelmed,
leading to the vacuum tube is the top of the solar water heater vacuum tube can
not be confined to run;
Diameter mounted solar collector component
design so that it can not take full advantage of the effective illumination of
the unit area, thus leading to low collection efficiency of heat collecting
element; fifth is due to the intake pipe solar water heater design is not
reasonable protective measures is not enough perfect, so that the solar water
heater to the water intake pipe frozen block the cracking in the north and the
alpine region and can not be used;
Sixth, existing solar controller water heater liner
stainless steel liner or enamel interior, stainless steel liner is sanitary,
but it also contains heavy metals, stainless steel has been destroyed in the
welding process of the lattice structure of the metal, will cause corrosion
leaks, is not conducive to the health of users, some low-quality stainless
steel may release harmful heavy metals, magnesium anode rod called descaling
way to increase the scale of the water, but will not conducive to health;
Seven existing solar water heaters are
mostly followed the traditional installation, solar water heater installed on
the roof or on the roof, in the high-rise buildings in the city, this
installation method is unable to meet the demand of the people to use solar
water heaters, and roof installation of solar water heater caused a lot of
insecurity; eight is the use of solar water heaters in summer, often boiling
evaporation, water in the tank becomes water vapor run away, both caused by
waste, the hardness of the water in the tank and make larger, do not conducive
to human health; solar water heaters do not work well with the lithium bromide
refrigeration heating and building integration;
Nine collector components of the solar
water heater vacuum tube solar water heater can not be used due to the cracking
of the water freezes in the cold season; In addition, solar energy products can
not achieve a good photoelectric light and heat integration; rain on a cloudy
day solar water heaters, solar water heaters can not be good with other heat
sources, such as the deployment of heat pump energy used in combination; solar water
heater can not be done photovoltaic, solar thermal, solar tracking, not
efficient use of solar energy; pressure to run, then stopped in the water water
does not work properly, causing inconvenience;
Glass shell metal heat pipe between the
glass and metal flange weld metal due to thermal expansion and contraction,
fatigue, aging, metal heat pipe leak caused by glass enclosure, which restricts
the life and the scope of application of the glass shell metal heat pipe ;
Sun all-glass heat pipe wall contact caused
due to the quench liquid working medium and high temperature caused by thermal
shock lead to burst or cause an explosion due to the high working pressure and
cause an explosion or scratch glass wall stress; solar water heater to the
machinery of the water is often due to the state of the pressure without water
you can not use non-pressure is often caused by running water closed lax and
difficult to automatically row of dirt, scale down the river in the process of
taking a bath these issues are to some extent restricted the application of
solar products.
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