The article puts forward the index of hot loss rate of horizonal maladjustment recieved by the uneven dgree of returning water temperature in each circuits of hot net according to the maladjustment of hydraulic water, which is the standard to judge and evaluate the maladjustment degree of hot net.

This paper probes into the technical measures for improving the economy of the hot water heating from two aspects of the supply and return water temperature and the specific pressure drop, and expounds the paths for improving the economy of hot water heating from the angle of operation management.

Applying the correction coefficient of heat load, the formula on supply and return water temperature in variable temperature control with varied flow is corrected.

Deduces the adjustment formulas of supply and return water temperature and relative flow for both primary and secondary circuits, and gives corresponding adjustment curves with calculating examples.

the combined heating, cooling and power (CHCP) system of Beijing is studied here, high temperature water generated by two cogeneration plants circulates through a network between the plants and heat substations.