Consider a vessel containing steam at 180 °C. The initial steam quality is 0.5 and the initial volume of the vessel is 1 m³. The vessel loses heat at a constant rate q̇ under isobaric conditions so that the quality of steam reduces to 0.1 after 10 hours. The thermodynamic properties of water at 180 °C are (subscript g: vapor phase; subscript f: liquid phase): specific volume: v_g=0.19405 m³/kg, v_f=0.001127 m³/kg; specific internal energy: u_g=2583.7 kJ/kg, u_f=762.08 kJ/kg; specific enthalpy: h_g=2778.2 kJ/kg, h_f=763.21 kJ/kg. The rate of heat loss q̇ (in kJ/hour) is ______ (rounded off to the nearest integer).