Energy-saving and efficient gas central hot water optimizing system

Abstract

The invention discloses an energy-saving and efficient gas central hot water optimizing system. The energy-saving and efficient gas central hot water optimizing system comprises a cold water main pipe, a primary heating circulation pipe, a secondary heating circulation pipe, a cold water supplementing electric valve, a hot water heat-preservation water tank, a water heater circulating pump, a gasunit, a PLC, a water level sensor and a temperature sensor; the gas unit is divided into a primary heating gas unit body and a secondary heating gas unit body; one end of the cold water supplementingelectric valve is connected into a municipal water supply pipe network through the cold water main pipe, and the other end of the cold water supplementing electric valve sequentially communicates withthe primary heating gas unit body and the hot water heat-preservation water tank through the primary heating circulation pipe; the water outlet end of the hot water heat-preservation water tank sequentially communicates with the water heater circulating pump and the secondary heating gas unit body through the secondary heating circulation pipe to form a closed loop; and the water level sensor andthe temperature sensor are mounted in the hot water heat-preservation water tank. According to the energy-saving and efficient gas central hot water optimizing system, the problems that the gas unitcannot conduct full-power output, water temperature fluctuation of the hot water heat-preservation water tank is large, and a large amount of energy of the water heater circulating pump is consumed during system heating are solved.

Description

technical field [0001] The invention relates to the field of central hot water systems, in particular to an energy-saving and high-efficiency gas central hot water optimization system. Background technique [0002] The central hot water system is actually hot water when you turn on the faucet, and hot water comes out from the shower. Provide convenience for life. At present, it is generally only used in hotels, bathing places, clubs and other places. With the improvement of living standards, families and some small and medium hotels are gradually adopting it. Hot water at any time makes your life comfortable. Washing hands and dishes are all hot water, let alone bathing. The central hot water system is mainly composed of heat source, heat exchange, heat storage and circulation system. refer to figure 1 , such as a common central hot water system (abbreviated as the original system), including cold water pipes, heating circulation pipes, cold water supplement electric va...

AI Technical Summary

Problems solved by technology

[0003] (1) The gas-fired unit cannot output at full power: the gas-fired unit has its own characteristics—that is, the temperature difference between the inlet water and the outlet water is large. If the temperature difference is as small as △ ≥ 5°C, the power output of the gas unit is only about 20%: the greater the temperature difference between the inlet and outlet water, the greater the output power of the gas unit and the higher the thermal efficiency; The smaller the temperature difference between the inlet water and the outlet water, the lower the output power of the gas unit and the lower the thermal efficiency.

Under normal circumstances, due to the constant temperature setting of the hot water insulation water tank, the water temperature is 50°C-55°C, while the outlet water temperature of the gas-fired unit is generally about 55°C, so the power of the gas-fired unit is obviously idle, causing waste and redundancy.

[0004] (2) The water temperature of the hot water insulation water tank fluctuates greatly: when the water terminal uses a large amount of hot water, the water level of the hot water insulation water tank will drop rapidly. When the water level is lower than the set water level, the PLC controller will automatically open the electric valve for supplementing cold water Large cold to hot water insulated tank

When the weather conditions are bad, the water temperature of the hot water insulation tank will drop rapidly. Although the output power of the gas unit is slightly increased due to the increase in the temperature difference between the inlet and outlet water at this time, due to poor weather conditions such as low ambient temperature and low cold water temperature , the heat loss of the system is large, etc., and its heating capacity cannot fully meet its instantaneous temperature drop, which may cause the water temperature in the hot water insulation tank to drop rapidly to 50°C or even lower, thus greatly affecting the system’s hot water supply temperature. The stability and user experience of water users

[0005] (2) The system heating water heater circulation pump consumes a lot of energy: municipal tap water first flows into the hot water insulation tank. When the gas unit heats the hot water insulation water tank, the water heater circulation pump needs to be started, that is, the central hot water system needs to start the water heater as long as it is heated. Circulating pump, which not only consumes electric energy, but also has hidden dangers of failure in the long-term operation of the water heater circulating pump, requiring frequent maintenance

Images