1. The nominal operating conditions and performance parameters of the unit are shown in Table 1
2. When the pressure-bearing capacity of the system's cold water, cooling water, warm water, sanitary hot water or heating hot water exceeds 0.8MPa, requirements should be submitted to the direct-fired engine equipment manufacturer .
3, direct combustion engine fuel standards are shown in Table 2.
4, the impact of the fouling coefficient of cold water, cooling water, warm water, and sanitary hot water on cooling capacity and heat supply is shown in Table 3.
It is known from Table 1 and Table 3 that when the fouling coefficient of the water side of the direct-fired unit is 0.043㎡-K/kW, its cooling capacity is 1.07 times of the nominal working condition, and the heat supply is 1.03 times of the nominal working condition. .
5. The exhaust temperature under cooling/heating conditions of a direct-fired machine is generally 145~220℃, and the exhaust residual pressure is generally 9.807~98.07Pa. The design should be considered based on the specific model of the direct-fired engine and the actual engineering conditions. Smoke exhaust system.
6. Direct combustion engine water flow adjustment range:
①. The allowable flow adjustment range of cold water is generally 50%~120% (according to rated parameters);
②. The allowable flow adjustment range of cooling water is generally 50%~120% (according to rated parameters);
③. The allowable flow adjustment range of warm water and sanitary hot water is generally 65%~120%.
7. Direct combustion engine nominal warm (hot) water outlet temperature:
① When using the evaporator , absorber, condenser side to produce warm water, the nominal outlet temperature of the warm water should be at least higher than the refrigerant pump and absorption in the unit The maximum operating temperature of the liquid pump is 10°C lower.
②. When using the high-voltage generator with an additional hot water heat exchanger to produce warm (hot) water, the nominal outlet temperature of the warm water should be at least 15°C lower than the local boiling point; HVAC Design Teacher Du reminded that if the equipment exceeds the limit, It should have its own protective device, but its nominal outlet temperature should be at least 5°C lower than the local boiling point.
8, the water quality standards for direct combustion engine cold water, cooling water, and circulating water replenishment, and the hazards of exceeding water quality standards are detailed in Table 4. The technical specifications of
9 and direct combustion engine lithium bromide solution are shown in Table 5.
