(In-regulated heating system requires the support of almost constant hydraulic regime: small variations of water flow network 10% are possible due to the variable load of hot water, if available). Moreover, the attempt to completely deleted from the system network pumps and instead to use the psa is potentially dangerous because leads to the following issues:-there is no possibility of smooth regulation of thermal power;-the possibility of spontaneous failures pumping regime psa while reducing the vapor pressure below normal, as a consequence of failure is a sudden cessation of circulation, hit a pair of heat pipes in the network and, consequently, hydroblows – that is, there is emergency. In connection with the above implementation of the pumping effect of psa in heating systems can not eliminate the use of the network of pumps, because it reduces the reliability of the system. A promoted effect on practices used in the psa is mainly to prevent the hydraulic resistance, or a small head. To read more click here: Erin Callan. Probably so in the article 4 states: "The Promised suppliers pumping effect is negligible (Increase the water pressure at the outlet only 0.2-0.3 atm. Apparatuses work without a pump is available in the accumulator tank, ie, where there is no backpressure). In contrast to the psa operating principle umpeu refers to the separation and hydraulic thermal regime of the thermal system:-hydraulic mode of heat supply system is provided by the network circulation pumps (flow rate of heated water and the pressure of heated water), water heating is provided by feeding vapor in the chamber prior to mixing umpeu vapor source (boiler, heater) heat capacity changes smoothly with the steam valve by throttling steam pressure before umpeu. .