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INVENTION
Russian Federation Patent RU2163327

METHOD district heating

Name of the inventor: Tomilov Vitaly G.; Yuri L. Pugach; Nozdrenko Gennady; Pugach Leo Itskovich; Ovchinnikov Yuri V.; Schinnikov Pavel; Valery A. Kapustin; Evgeniy Yevtushenko; Ivan Sazonov; Hunters Anatoly; Herbalists Yuri Stepanovich; Schoolboy Solomon Samuilovich
The name of the patentee: Tomilov Vitaly G.; Yuri L. Pugach; Nozdrenko Gennady; Pugach Leo Itskovich; Ovchinnikov Yuri V.; Schinnikov Pavel; Valery A. Kapustin; Evgeniy Yevtushenko; Ivan Sazonov; Hunters Anatoly; Herbalists Yuri Stepanovich; Schoolboy Solomon Samuilovich
Address for correspondence: 630092, Novosibirsk, Karl Marx 20, Novosibirsk State Technical University, Department of.. TPP Schinnikovu PA
Starting date of the patent: 2000.03.23

The invention relates to power engineering and can be used in district heating systems. district heating method comprises applying a direct mains water on the flow line, using the heat of direct mains water, removing thermal point for a couple of working agent, the commission received by the ferry operation in the process of condensation in the heat pump and return the return water on the back line, with heating return water to the central heating is carried out until the temperature, due to the schedule of hot water, with the transfer of heat in a remote section of heat circulating water heating circuit, and the condensation of the working agent vapor in the heat pump are circulating heating circuit water. The technical result is to increase the efficiency.

DESCRIPTION OF THE INVENTION

The invention relates to the field of energy and can be used in district heating systems.

There is a method of district heating, which can be understood by considering the substation work GS Ruzavina for the heating system (patent N 2,002,169 C1 RU, MKI F 24 D 15/00). The method comprises sequential heating return water in the central heating (CHP), the peak heater or boiler and remote heating stations GS Ruzavina. Cooled in a heat Networked water on return pipe heating network fed to CHP, where the series is heated in a tube bundle of a steam turbine condenser, network heaters upper and lower district heating steam extraction in peak heater or boiler and pipeline direct mains water is fed into the heating area. In remote thermal point low-grade heat return water used for equalization temperature of hot and cold water through the use of two heat pumps and peak load due to the schedule of the heat consumption, are covered by raising the temperature of the direct heating water in the boiler peak.

The disadvantage of this method is a district heating:

the necessity of heating the coolant flowing along the return line CHP successively in the condenser of the steam turbine, network heaters upper and lower offtake and peak heater or boiler to temperatures resulting coated peak of the heat load curve, leading to high losses of heat in the conduit direct mains water and high specific consumption of equivalent fuel for heat for the central heating (CHP).

The closest to the proposed method is a district heating (AS N 1800235 A1, SU, MKI F 24 D 11/02), which consists in the supply of water for direct network supply line from the main heat source to a remote heat source and then to return and teplopotrebitelyu network water on the return line. The remote heat source of the heat is direct network water used for preparing the working medium pair and performing this operation during steam condensation in a heat engine, and the condensation of the working fluid vapor exhaust feedback network are water, while heated water is fed to the mixing water with direct network. Covering the peak of the graph Heat load (heat consumption) is carried out by heating the return water in the central (mostly) of heat to temperatures caused by this schedule either by direct heating system water in the peak water-heating boiler-house on a remote heat source.

The disadvantage of this method of district heating are low efficiency due to the need for heating the coolant to the central heating (CHP) to temperatures caused by the schedule of the heating load, which results in high heat losses in the piping direct mains water.

The object of the invention is to provide a method for district heating, which is more economical.

This object is achieved by the fact that in the known method, which consists in applying direct mains water on the flow line, the use of heat direct mains water, removing thermal point for a couple of working agent, the commission received by the ferry operation in the process of condensation in the heat pump and return of return water on the return line, the heating return water to the central heating is carried out until the temperature, due to the schedule of hot water to transfer heat in a remote section of heat circulating water heating circuit, and the condensation of the working agent vapor in the heat pump are circulating heating circuit water.

The drawing shows one possible district heating systems, implementing the proposed method.

The system includes a piping straight line 1 and the back 2 mains water heating system from the central heat supply station (CHP) and remote (eg, intra) heating unit containing an absorption lithium bromide heat pump, which consists of a generator 3, a capacitor 4, a regenerative heat exchanger 5, absorbera- evaporator 6-lithium bromide circuit 7, the working agent circuit 8 and the heating water circulation circuit 9, providing heat in holiday heating devices 10. in addition, the remote heating unit equipped with a combustion chamber 11 and the highly reactive fuel 12 to the chimney flue .

The method can be understood by considering the work of the said system.

From the central heat supply station (CHP) network with the water temperature due to the heat release mode "hot water" on the pipeline direct network water 1 is fed to a remote (eg, intra) heater equipped with a lithium bromide absorption heat pump. Low-grade heat transfer system water to the water circulating in the heating circuit 9 in the absorber-evaporator 6 of the heat pump. Increasing the temperature of water circulating in the heating circuit until the temperature, due to heat consumption schedule heating devices 10 in heating period is performed in the heat pump condenser 4.

The process of raising the temperature in the heating circuit are due to the absorbent circulating and working agent in lithium bromide circuit 7 and the working agent circuit 8, respectively. For working agent vapor in the generator 3 is fed to the heat pump hot gases resulting from burning highly reactive fuels, such as natural gas in the combustion chamber 11, which is then removed from the stack 12. The vapor working fluid in the condenser 4 is activated heat pump circulation giving heat water heating circuit 9. The regenerative heat exchanger 5 the heat pump is carried out a regenerative heat absorbent (lithium bromide).

A network water, cooled to a temperature due to the schedule of "hot water" (about 30 ^{o C),} return to the central heating plant (CHP) in line 2 back system water.

In this system water heating process at central heating stations (CHP) is carried out only in the lower network heaters selection of heating to a temperature load schedule caused by "hot water".

Thus, the described method of district heating has a higher efficiency due to the fact that:

1. The process of heating return water to the central heating (CHP) are only in the lower network heaters selection of heating to temperatures caused by the load schedule, "hot water", which in turn reduces the direct delivery water temperature and, as a consequence, the loss heat pipeline direct mains water.

2. Lowering the temperature of direct water network increases power generation at thermal consumption by increasing the admission of steam in the steam turbine condenser CHP.

3. Reduction of direct delivery water temperature leads to a reduction in system water volume flow, which leads to reduction of energy on pumping coolant.

In addition, the decrease in temperature direct network of water leads to the abandonment of the use of the central heating stations (CHP) peak boilers (PVK) and network heaters top selection of heating, which reduces fuel consumption in the production of heat in CHP and reduces investment in CHP.

CLAIM

The method of district heating, consisting in submitting a direct mains water on the flow line, the use of heat direct mains water, removing thermal point for a couple of working agent, the commission received by the ferry operation in the process of condensation in the heat pump and return the return water on the return line, characterized that the heating of the return water to the central heating is carried out until the temperature, due to the schedule of hot water to transfer heat in a remote section of heat circulating water heating circuit, and the condensation of the working agent vapor in the heat pump are circulating heating circuit water.

print version
Publication date 29.01.2007gg

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