RU71378U1 - DEVICE FOR METERING OF HEAT ENERGY IN HEATING SYSTEMS - Google Patents

Abstract

The utility model relates to the field of energy conservation, in particular, to accounting for the amount of heat for heating premises in the cold season. EFFECT: increased accuracy of determining thermal energy in heating systems due to the direct method of measuring heat fluxes. To do this, use heat flow converters (PTP), which are installed in compliance with reliable thermal contact at the inlet and outlet of the heating system. Half a thermo-emf. The DFT in the heat calculator is multiplied by the surface area of the heating system and the DFT conversion coefficient, this product is summed over time and the desired value of the consumed thermal energy is obtained.

Description

The utility model relates to the field of energy conservation, in particular to accounting for the amount of heat for the purpose of heating the premises in the cold season.

Known devices for determining thermal energy in heating systems (Zubov S.P. Comparative analysis of heat meters with autonomous power. Proceedings of the 5th international conference "Actual problems of electronic instrumentation", Novosibirsk, NSTU publishing house, volume 6, 2000, p.165 -168, patent RU 2145063 C1, G01K 17/20, 01/27/2000) The disadvantage of these devices is the indirect measurement method, which measures the energy loss of the coolant, and not the thermal energy in heating systems for heating purposes.

A device for determining thermal energy using heat flux converters (PTP) (see the book. Gerashchenko OA Basics of heat metering. Publishing house "Naukova Dumka", Kiev, 1971. p.162-163). The disadvantage of this device is its use not for the purpose of determining thermal energy in heating systems.

The closest set of features to the claimed device is a device for determining convective and radiant components of complex heat transfer (see book. Gerashchenko OA Basics of heat metering. Publishing house "Naukova Dumka", Kiev, 1971. p.162-163). Disadvantage

A known device is the lack of accuracy in determining the heat flux for heating.

The technical problem solved by the claimed utility model is the creation of a device that allows you to calculate the thermal energy for heating in heating systems.

EFFECT: increased accuracy of determining thermal energy in heating systems due to direct measurement of heat fluxes.

The specified technical result is achieved by the fact that at the sections of pipelines at the inlet and outlet of the heating system, PTPs are installed and connected in series according to to obtain the total values of thermoelectromotive force (thermo-emf). Total thermo-emf. fed to the input of the heat calculator, then calculate the thermal energy spent on heating: thermo-emf. divided in half, multiplied by the surface area of the heating system and the coefficient of conversion of the PTP, summarize this product in time and display the value of the consumed thermal energy on the display based on the calculation formula.

An example of a specific implementation of the device.

The proposed device is shown in Fig. 1. and works as follows. Input and output devices are installed PTP _Rin (1), and PTP _O (2) which are connected in series in the. Through PTP _Vkh , heating

system (3) and PTP _output passes the coolant. The heat calculator (4) is connected to the heat flux converters PTP _in and PTP _out. .

The heat transfer process can be explained by the graph (Fig. 2)

The graph shows the average surface temperature of the heating system

She corresponds to the average total thermo-emf. PTP _in and PTP _out

Because thermo-emf. TAP TAP _{O Rin} and depend mainly on the _Bx t and t _O, a difference (t -t _{O Bx)} is a few degrees, it can be assumed that the heat transfer coefficients of TAP and TAP _{Rin O} to indoor air is practically the same and equal , and the only source of information about the amount of transferred heat can serve as a half-sum of thermo-emf. PTP _in and PTP _out . Moreover, the area of the rectangle AVSD is equivalent to F _oc · α · (t _oc -t _n ), or , and the heat measured using PTP is determined by the calculation formula

where Q ^* _n is the heat transferred to the room, J

to _PTP - conversion coefficient, W / (m ² · mV),

F _oc - surface area of the heating system, m ² ,

, - average total thermoelectric power, mV,

where E _in and E _out - thermo-emf. PTP _input and PTP _output , mV,

τ - time, s

The proposed device can be implemented, for example, so that PTP is installed on sections of pipelines at the inlet and outlet of the heating system and connected in series according to it, while ensuring reliable thermal contact, and the conclusions from them are connected to a heat calculator. The calculator preliminarily _{enters the} values for _PTP and _F.s. . Summarize the work in time, get the value of consumed thermal energy. This device allows to increase the accuracy of determining thermal energy in heating systems. The device is easy to manufacture and economical to use.

Claims (1)

A device for accounting for heat energy in heating systems, comprising heat flow converters at the inlet and outlet of the heating system and a recording device, characterized in that heat flow converters (PTP) are installed in series on the pipe sections at the inlet and outlet of the heating system, connected in series according to.