SK75398A3 - Device for measuring a heat in steam used for the preparation of warm water - Google Patents

Abstract

A flow meter is installed in the cold water line (5) (7) cold water and thermometer; a domestic hot water pipe (8) is fitted with a thermometer (12) domestic hot water, into the circulation pipe (9) A circulating water flow meter is installed (10) and a circulating water thermometer (11) into condensate condensate thermometer (3) is installed in the pipe (2). Items (3, 6, 7, 10, 11, 12) send pulses to integrator (13).

Description

Technical field

Technical classification of buildings.

State of the art

The steam heat used to produce domestic hot water (DHW) must be measured for billing. This has been done so far by several types of meters, these are divided into direct and indirect.

Direct meters are located at the steam inlet to the relevant equipment (most often DHW boilers), they are inaccurate and unreliable. This is due to the fact that the amount of steam often fluctuates considerably in the process of DHW heating and its quality, especially its humidity, changes. The increase in humidity caused by the cooling of the vapor by the environment is virtually impossible to measure. This circumstance may significantly impair measurement.

Indirect meters are based on identifying the amount of steam with its condensate. The steam condensate is in liquid form and thus easier to measure. This eliminates the inability of direct meters to satisfactorily record fluctuating amounts of steam. The second defect of direct meters - the inability to evaluate the deterioration of the steam quality level even in indirect meters remains.

SUMMARY OF THE INVENTION

The inability of the existing steam heat meters used to measure the heat used to prepare hot water to determine the steam moisture is removed by the patent device, where the heat consumption measurement is transferred to the water side, the water in the heating process consumes heat from the steam to cover three items:

(1) Immediately for self-heating, (2) to cover thermal losses caused by water circulation, and (3) to cover losses of radiation from the appliance (4), all three items being (1), (2), (3) continuously evaluated in the integrator .

SUMMARY OF THE INVENTION is that the integrator calculates the heat from the steam used (1) immediately for heating the cold water by means of pulses from the flow and temperature sensors of the cold water and the hot water temperature. circulating water and thermometer heated and finally, (3) adding the heat losses generated by radiation into the environment - determined by external calculation and inserted into the integrator. In this way, all 3 heat consumption items used for domestic hot water production are recorded in the integrator, this is not possible with previous meters. Depending on the size ratio of items (1), (2), (3), the economic efficiency of hot water production is determined.

Image overview

Figure 1 is a schematic of a patented steam heat meter used to produce hot water.

Meaning of used tags:

1. Steam pipe

2. Steam condensate piping

3. Condensate thermometer

4. Equipment for preparation of domestic hot water (boiler, counterflow heater, storage tank)

5. Cold water pipes

6. Cold water thermometer

7. Cold water flow meter

8. Domestic hot water pipes

9. Circulation piping

10. Circulating water flow meter

11. Circulating water thermometer

12. Domestic hot water thermometer

13. Integrator

14. Circulating water pump

15. DHW consumption

-— para ~ 7/7 X 77 cold water hot tap water

------------------ circulating water —------ steam condensate impulse pipe

DETAILED DESCRIPTION OF THE INVENTION

It is shown in figure no. 1. The steam flows through line I to the device 4 and flows in the form of condensate through line 2. The cold water flows through line 5 to the device 4 and is heated to the desired temperature by steam flowing into the device 4 through line 1. Water heated by steam in the device 4 (ie domestic hot water (DHW) is pushed by pipe 8 into the DHW consumption by means of cold water pressure from line 5.

The integrator 13 determines the heat consumption in the steam for the production of hot service water on the basis of the sum of the three counted measures:

The first addition is determined by the flowmeter 11 and the temperature difference of the thermometers 12 and 6.

The second addition is determined by the flowmeter 10 and the temperature difference between thermometers 12 and H ·

The third addition is inserted into the integrator 13 as the initial discrete value of the heat losses generated by the radiation of the device to the surrounding environment (e.g., the boiler room). The third addition is determined by an external calculation individually for each case and the degree of application is assessed by the integrator 13 using thermometers 3.12. The integrator according to the value of the water temperature given by the thermometer 12 can determine the part of the losses that belongs to the device 4.

The sufficiency of the thermal utilization of steam and its condensate in the apparatus 4 is judged by the temperature of the condensate determined by the thermometer 3.

Industrial use

The equipment will be used in heating and sanitary technology of technical equipment of buildings of residential, civil and industrial buildings, in which the preparation of hot service water is done by steam. Its application will replace expensive imported instruments.

Claims (1)

PATENT CLAIMS A device for measuring the heat of steam used to produce hot water, characterized in that the integrator (13) calculates the heat consumption of the steam based on pulses from a cold water flow meter (7), a circulating water flow meter (10), a cold water thermometer (6). , a circulating water thermometer (11) and a domestic hot water thermometer (12) and adding a fixed value of heat losses from the surface of the domestic hot water apparatus (1), (2), (4).