Q - cooling load of fresh air in summer (kw)<br>HW - enthalpy of outdoor air (kJ / kg)<br>HL - enthalpy value of state point after treatment of fresh air unit (kJ / kg)<br>According to the chart of enthalpy and humidity, when the indoor design dry bulb temperature is 26 ℃ and the indoor relative humidity is 70%, the enthalpy value HN is 64.3kj/kg; the outdoor calculation dry bulb temperature of Tianjin air conditioning in summer is 33.9 ℃, and the outdoor calculation wet bulb temperature in summer is 26.8 ℃. The calculated state point of outdoor air conditioning in summer can be determined, and the enthalpy value HW is 84.4kj/kg.
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