It can reach a water supply temperature of more than 60 degrees, and there are big differences between different brands.
Air, water and geothermal heat pumps and other systems are suitable for terminal systems that turn off when people leave, which can maximize the energy saving effect of the system. For ordinary radiator systems, the water temperature must be relatively high. Generally, the water supply temperature is above 60 degrees. At this point, the COP value of the heat pump is much lower than that of the water outlet at 45 degrees. . It needs to work 24 hours a day. The energy saving effect is not good and the operation cost is significantly higher, generally not recommended unless there is no other choice.
What should the diesel generator set pay attention to in low temperature weather
Adjust the heater water temperaturefloor heating in the wall boiler at 50 degrees to cycle and save natural gas.
The wall-mounted gas boiler is designed according to the operating conditions of high temperature water supply and low temperature return water with a large temperature difference (20°C) and low flow. of the European gas wall boiler is generally 80°C supply and return water. The water is 60℃, while the low temperature hot water radiant floor heating requires a large flow rate and a small temperature difference to work.
Detailed information:
Before use, you should first check whether the water pressure gauge indicator of the wall-mounted boiler is within the specified range. When using it, be careful. that the pressure is not too highlifted. 1.2~1.5 is the most suitable range. If it is exceeded, the life of the sealing component will be reduced. If it is too small, it will cause it to fail to start. The solution is to open the relief valve to release the water and open the water inlet switch to add water.
The power outlet should be a three-prong grounded outlet. Keep the plug and socket dry and do not allow water to enter. The power cord should not come into contact with the exhaust device housing, etc. to prevent damage to the insulation layer of the power cord at high temperatures.
Baidu Encyclopedia - Wall-mounted boiler
1. Diesel generator sets cannot use open flames to cook the diesel generator oil pan. This will cause deterioration or even combustion of the engine oil in the oil pan, and the lubrication performancen will be reduced or completely lost, thus worsening the wear of the machine. In winter, you should choose engine oil with a low level. pouring point.
2. In winter, choose a light diesel with a lower freezing point and better ignition performance. Because the low temperature in winter will reduce the fluidity of diesel fuel, increase the viscosity and make spraying difficult, resulting in poor atomization and incomplete combustion, resulting in reduced power of diesel generator set and unnecessary waste. It is generally required that the freezing point of diesel fuel be approximately 7°C lower than the local air temperature.
3. After the diesel generator is stalled when using the diesel generator set, the water temperature should be lower than 60°C and the water is not hot for your hands, then turn off the flame and drain the water. When the body issuddenly hit by cold air when the temperature is relatively high, it will shrink suddenly and cracks are likely to occur. Water must be carefully drained.
4. The air filter cannot be removed to heat, which may damage the piston, cylinder and other components.produce wear.
The temperature in winter is low and the diesel generator is too cooled when operating. Insulation is therefore a key issue when using diesel generators in winter. In the north, diesel generators used in winter must be equipped with insulating sleeves, insulating curtains and other cold-resistant equipment. They often adopt abnormal starting method without water (start first, then add cooling water). This could cause serious damage to the device and should be prohibited.
Preheating method: first place the insulation quilton the water tank, then open the drain valve, continuously inject fresh clean water at 60-70℃ into the water tank, and feel the water flowing out of the drain. valve with your hands if it is hot. When the time comes, close the drain valve, pour clean fresh water at 90-100°C into the water tank and rotate the crankshaft to allow each moving part to be properly pre-lubricated before to start up. .