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A thermal efficiency correction method for gas-fired condensing boiler inlet water temperature deviating from design 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 influence of energy efficiency testing of new products of condensing boilers, and achieve the effect of perfecting test methods, promoting energy-saving potential, and promoting improvement

Active Publication Date: 2021-04-20
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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  • A thermal efficiency correction method for gas-fired condensing boiler inlet water temperature deviating from design value
  • A thermal efficiency correction method for gas-fired condensing boiler inlet water temperature deviating from design 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 present invention proposes a thermal efficiency correction method in which the inlet water temperature of a gas-fired condensing boiler deviates from the design value. Firstly, the measured thermal efficiency of the boiler in the boiler test system is obtained, and the thermal efficiency ratio of the boiler is calculated to obtain the measured thermal efficiency of the condenser, and the thermal efficiency ratio of the condenser is calculated in the case of a multi-stage condenser. Next, each stage of condenser is tested and calculated according to the above steps respectively to obtain the thermal efficiency ratio of the condenser. Under a certain feedwater temperature and a certain load condition of the boiler, the boiler measured thermal efficiency correction method of the boiler test system is calculated according to the following formula: the invention solves How to correct the feedwater temperature of the condensing boiler when it deviates from the design value has an impact on the energy efficiency test of the new condensing boiler product, and proposes a thermal efficiency correction method for the gas condensing boiler inlet water temperature that deviates from the design value, which can accurately reflect the thermal efficiency of the condensing boiler product The difference from the design thermal efficiency.

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