Common hot water systems of hot water systems in economical hotels.

The direct heating mode of budget hotels usually relies on a hot water boiler with a certain volume of liner, which directly heats the water in the liner with gas or electricity, and can directly transport the hot water to the end of the hotel without the need to configure a heat exchanger, an insulated water tank and a secondary side circulating pump.

System characteristics: direct heating mode can save intermediate heat exchange or heat storage links and simplify the hot water system; It can not only reduce the initial investment of the system, but also avoid unnecessary heat loss and improve the efficiency of the system. The direct heating mode has been widely used in North China and unanimously recognized by the market, and has become the mainstream solution for the new generation of energy-saving hot water in the US market.

(1) Take a hot water boiler or a vacuum boiler as an example. Because of the high water temperature and large make-up water, the uncoated boiler liner will be easily corroded, so it is necessary to indirectly heat the boiler water through heat exchange equipment.

System features: Indirect heating will lead to additional cycle heat loss and power cycle electric energy consumption, reduce system efficiency, increase operating energy consumption, increase the cost of system accessories and increase the floor space.

(2) Take the heat pump water heater or solar energy system as an example. The heat pump hot water unit or solar energy is limited by the output power of the unit and the stability of the heat source. The system must be equipped with large-tonnage heat storage equipment to store heat to meet the peak hot water demand.

System features: Indirect heating will lead to additional cycle heat loss and power cycle electric energy consumption, reduce system efficiency, increase operating energy consumption, increase the cost of system accessories and increase the floor space. In most cases, the heat pump hot water unit or solar energy system needs to be arranged on the roof of the building, which has high restrictions on the installation location.