DD144104A1 - CIRCUIT ARRANGEMENT FOR INCREASING THE TRANSMISSION CAPACITY OF HOT WATER LINE - Google Patents

Abstract

The invention relates to a circuit arrangement for increasing the transmission capacity of hot water pipes, in particular for Connecting additional consumers to an existing one District heating distribution system. Your job is to increase the capacity a district heating system by maximum cooling of the , Primary network return water to expand and to heating and Domestic hot water supply of a second or extended , Sekundärkrei'slaufs use. For this purpose, the secondary return 5 is a Supply area kept constant by means of control device 7, via a Verhindungsleitung 6 as a lead for the supply of more Customer with heat for space heating and domestic hot water preparation used and then for the purpose of maximum use of his Heat capacity directly to the primary-side heat exchanger 12th recycled. ~ Fig.1 -

Description

a) Title of the invention. ,

Circuit arrangement for increasing the transmission capacity · of hot water lines * i

b) Field of application of the invention

The invention relates to a circuit arrangement for increasing the transmission capacity of hot water pipes, in particular for connecting other heat consumers, to an existing district heating distribution system «

c) Characteristic of the known technical solutions

District heating systems for the supply of whole territories with heat and domestic hot water basically consist of a ·· primary side and a secondary side heating circuit on the customer side. In so-called indirect feed, both circuits are materially separated from each other and connected by heat exchangers, with direct feed (Ketzinhaltswasser flows directly through the heating systems of the consumer), only a portion of the flow for domestic water heating one or two stages over V / ärmeübertrager out. Each district heating system is designed for certain supply and return temperatures and a corresponding system pressure, depending on the respective generator output and the available pipelines and radiators. In practice, the following variants are used:

typ / tgp = 150 / 7O ⁰ C with direct infeed " ^{Ä 1} 50 / 8Q ° C with indirect infeed

It means ";

Temperature of the heating network water in the flow. - on the primary side :,. Temperature of the heating network water in the return - primary side

In order to be able to comply with the defined flow and return temperatures over the entire course of the day, it is customary to store the domestic hot water in boilers. The total heat output available for heating and hot water production results inter alia from the difference between flow and return temperature, the so-called temperature distribution.

Since an increase in the flow temperature for safety reasons (system overpressure) generally may not take place, an extension of Hetzkapazität can - ^eg:; the connection of new consumers - done only by'intensivere use of available heat output or by reducing the return temperature * So. It is known, for example, the flow of a 15O / 7O ° C system in two interconnected by heat exchangers heating circuits. with corresponding lower flow temperatures, the total return temperature is still 70 C. ». With another known method, the transport performance of a district heating system is increased by the use of multi-stage .Lententwärmespeicher. · Increased and thus the connection, other consumer groups to the return of the respective previous enabled This method looks - in addition to 'the high circuit and equipment technicalη expenditure for the latent heat storage ~ preferred Use of heat pumps to substantially reduce the return temperature "Finally, the use of hot water jet pumps has been proposed for the extension of the last capacity by return cooling, whereby, however, only a return cooling down to 60 C can be achieved."

d); Object of the invention · ·.

The invention aims to expand the capacity of an existing district heating system by better utilization of the available generators and heating networks so that, so that the connection of a number'weiterer consumers is possible and high investment and equipment costs for the reconstruction and modification already existing Heating networks can be saved <>

e). Explanation of the essence of the invention

The object of the invention is the development of a circuit arrangement with the aid of which the capacity of an existing JPernwär-mesystems extended by maximum cooling of Erimärnetzrücklaufwassers and used for heating and Brauchwarnrj / asserversorgung a second or extended secondary circuit. , -

According to the invention, the secondary return of a service area after passing through the heating systems and the .Wrauchwarmwasserwärmeübertragers is kept constant by means of control and used via a supply line 'as a flow for the supply of other heat consumers whose radiators and domestic water heating systems of the lower flow temperature of 70 ⁰ C, for example, are dimensioned accordingly. The Rücklaufwasser- · additionally connected customer is returned according to the invention directly to one of the heat exchanger of the original supply area and thus achieved that the preparation of the Yv'ärme for space heating and hot water preparation for the additional customers remaining amount of heat no-ch for the 1 «stage the hot water supply of the original supply area is used.

The realization of the invention ensures a higher transfer capability of existing hot water networks. Size

Their application becomes important if no new network sections need to be built as new or

_βββ / J _mm

Extensions of district heating channels in inner-city networks can not be realized or only with great effort. By applying the invention considerable investment funds can be saved. In addition causes. the higher recirculation cooling provides increased back pressure power generation when a cogeneration plant feeds into a district heating network in which the invention is realized (increasing electrical work, and power).

f). embodiment

The. Invention is shown below on two embodiments. The accompanying drawings show in

Figure 1 shows the hot water cycle of a supply area A with indirect feed and two-stage domestic hot water production with downstream 'second coverage area B; ·

Fig. 2, the hay of a system with two different temperature-controlled secondary circuits and central domestic hot water supply

1. The primary flow 1 of the coverage area A has a temperature of 150 ⁰ C, the secondary flow 2 of 11.0 ⁰ C. Uach delivery of its heating heat in the space heating systems 3; and the domestic hot water heat exchanger 4, the water leaves the secondary return 5 via the connecting line 6 with a through the controller Ί. A constant temperature of 70 C. the area A and becomes the flow of the area B. After flowing through the space heating systems 8 and the Domestic hot water heat exchanger 9, it is in the heat exchanger 10 of the area B; further cooled and flows from here via the return line 11i directly to the first heat exchanger 12 of the area A on, _so: that it can be returned to a return temperature of about 30 ⁰ C to Erzeageranlage via the return line. 13 The domestic hot water of the area B is continuously generated in the heating time and stored in the boiler 14.

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2c This is an all-new district heating system with recirculation cooling according to the invention. , To ^30/0 C. The illustrated in embodiment 1 part by * separated water heating for a subsequently to be connected area B can be omitted. The domestic hot .-. Water supply takes place here centrally via the 1 _β and 2 «heat exchangers 12 and 4 of the first primary or secondary circuit s _e The second, downstream secondary circuit serves only to deliver the Heizw.ärme. in the heating system η 8 * Van here flows from the cooled heating water. directly to 1 · heat exchanger 12 back »

Claims (1)

 <* ':, invention claim Circuit arrangement for increasing the transmission capacity τοπ hot water pipes, in particular district heating systems, by return cooling, characterized in that: the secondary return (5) 'of a service area after passing through the heating systems (3) and the Brauchwarmv / asserwärmeübertragers (4) by means of control device (7) held at a defined temperature, via a connecting line (6) used as a supply for the supply v / eiterer · customers with heat for space heating and domestic hot water preparation and arise hi ie end for the purpose of maximum utilization of its heat directly back to the primary side heat exchanger (12) , Circuit arrangement according to item 1, characterized in that the control device (7) is integrated between secondary flow (2) and secondary return (5) of the Versorguxigsgebietes « Circuit arrangement according to point Λ and 2, characterized in that the domestic hot water in the case of a total new network with two different temperature-controlled secondary circuits, centrally in the heat exchangers (4, 12) » For this /] page drawing