Thermal efficiency correcting method adopted when gas-fired condensing boiler water inlet temperature deviates from designed value

A technology for condensing boilers and inlet water temperature, applied in fluid heaters, lighting and heating equipment, etc., can solve problems such as the impact of energy efficiency testing of new products of condensing boilers, improve test methods, promote energy saving potential, and reduce measurement uncertainty degree of effect

Active Publication Date: 2020-01-07
CHINA SPECIAL EQUIP INSPECTION & RES INST
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Problems solved by technology

[0006] In order to solve the problem of how to correct the feedwater temperature of the condensing boiler when it deviates from the design value, which will affect the energy efficiency test of the new product of the condensing boiler, the invention proposes a method for correcting the thermal efficiency of the gas-fired condensing boiler when the inlet water temperature deviates from the design value, which can accurately reflect the condensation The difference between boiler product thermal efficiency and design thermal efficiency

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  • Thermal efficiency correcting method adopted when gas-fired condensing boiler water inlet temperature deviates from designed value
  • Thermal efficiency correcting method adopted when gas-fired condensing boiler water inlet temperature deviates from designed value

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specific Embodiment approach 1

[0022] Specific implementation mode one: see figure 1 This embodiment will be described. A method for correcting thermal efficiency of a gas-fired condensing boiler in which the inlet water temperature deviates from the design value described in this embodiment, the specific steps are as follows:

[0023] Step 1: Obtain different water supply temperature conditions of 10°C, 20°C, 30°C, 40°C, 50°C, 60°C, 70°C, 80°C, 90°C, 100°C, 104°C (20°C, 60°C, 104°C ℃ is the typical design feed water temperature), not limited to the above temperature, other feed water temperatures are also possible, the measured thermal efficiency of the boiler (excluding the condenser), the measured thermal efficiency is under different load conditions (30% ~ 110%, at least 5 load conditions);

[0024] Step 2: Calculate the boiler thermal efficiency ratio under different feedwater temperatures, different load boiler efficiency and design conditions Draw a table of ratios;

[0025] Step 3: Obtain diffe...

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Abstract

The invention provides a thermal efficiency correcting method adopted when gas-fired condensing boiler water inlet temperature deviates from a designed value. Firstly, measured boiler thermal efficiencies of a boiler testing system are obtained, boiler thermal efficiency ratios are calculated, measured condenser thermal efficiencies are obtained, and the condenser thermal efficiency ratios are calculated; under the condition of multiple grades of condensers, each grade of condensers undergo testing and calculation according to the above steps, and condenser thermal efficiency ratios are obtained; the boiler measured thermal efficiency correction value of the boiler at one water feed temperature under one load condition is calculated as the formula shown in the specifications. The thermal efficiency correcting method adopted when gas-fired condensing boiler water inlet temperature deviates from the designed value solves the problem that correction conducted when the condensing boiler water inlet temperature deviates from the designed value generates influence on a type approval performance test of a new condensing boiler product, and the difference between the thermal efficiency ofthe condensing boiler product and the designed thermal efficiency can be accurately reflected.

Description

technical field [0001] The present invention relates to the technical field of boiler thermal performance test, and more specifically relates to a correction method for boiler inlet water temperature deviating from a design value or guaranteed value in the thermal efficiency test of a condensing boiler. thermal efficiency. Background technique [0002] The purpose of the boiler thermal performance test is to check whether the thermal performance of the equipment meets the design value of the boiler manufacturer or the guaranteed value stipulated in the contract. In 2010, the national technical specification TSG G0002-2010 "Boiler Energy Saving Technology Supervision and Management Regulations" (hereinafter referred to as "" "Energy Conservation Regulations") was officially promulgated. The "Energy Conservation Regulations" stipulates that new boiler products need to be tested for stereotyped products, that is, the thermal efficiency of boilers needs to meet the requirements ...

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Application Information

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IPC IPC(8): F24H9/20
CPCF24H9/2035
Inventor 齐国利
Owner CHINA SPECIAL EQUIP INSPECTION & RES INST
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