Research on control method of a R290 ASHP under low-temperature heating condition

Nuclear heating reactor is a new type of power plant that uses nuclear energy as heat source. Low temperature nuclear heating reactor should be the forerunner and main force for developing nuclear heating plant in China. Due to the lower water temperature required by the heating system, this dedicated, non-power generating nuclear reactor works at low temperatures and pressures with inherent safety features. The design, construction and operation of the nuclear heating reactors in various countries in the world were reviewed in this paper, and China’s new demonstration nuclear heating project and NHR-200 low-temperature heating reactor which would be used was discussed in the paper. We put forward the developing route and suggestion for the development of low-temperature heating reactor in China.

Download Full-text

A comparative review on the application of radiant low-temperature heating and high-temperature cooling for energy, thermal comfort, indoor air quality, design and control

Sustainable Energy Technologies and Assessments ◽

10.1016/j.seta.2021.101661 ◽

2022 ◽

Vol 49 ◽

pp. 101661

Author(s):

Arefeh Hesaraki ◽

Nazmul Huda

Keyword(s):

High Temperature ◽

Air Quality ◽

Low Temperature ◽

Thermal Comfort ◽

Indoor Air Quality ◽

Indoor Air ◽

Comparative Review ◽

Quality Design ◽

And Control ◽

Temperature Heating

Download Full-text

Performance analysis on compression-assisted absorption heat transformer: A new low-temperature heating system with higher heating capacity under lower ambient temperature

Applied Thermal Engineering ◽

10.1016/j.applthermaleng.2018.01.122 ◽

2018 ◽

Vol 134 ◽

pp. 419-427 ◽

Cited By ~ 7

Author(s):

Jian Wang ◽

Baolong Wang ◽

Xianting Li ◽

Wei Wu ◽

Wenxing Shi

Keyword(s):

Performance Analysis ◽

Low Temperature ◽

Ambient Temperature ◽

Heating System ◽

Heating Capacity ◽

Heat Transformer ◽

Temperature Heating

Download Full-text

Relieving of Residual Stresses in Metal Workpieces at High and Low Temperatures

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.887.651 ◽

2021 ◽

Vol 887 ◽

pp. 651-656

Author(s):

Marina V. Polonik

Keyword(s):

High Temperature ◽

Low Temperature ◽

Residual Stresses ◽

Low Temperatures ◽

Creep Properties ◽

Processing Modes ◽

Properties Of Materials ◽

High And Low Temperatures ◽

Temperature Heating ◽

High Temperature Heating

On the basis of previously accumulated irreversible deformations, and, consequently, residual stresses, the process of removing residual stresses in metal workpieces under the action of low and high temperatures is simulated. Boundary value problems are solved and here are described regularities that are responsible for removing residual stresses for processing modes: high-temperature heating - cooling, high-temperature heating - holding - cooling, low-temperature heating - holding - cooling. The holding stage is modeled, taking into account the creep properties of materials under Norton creep conditions. According to the dependences of the obtained exact solutions, it is shown that it is the holding process that leads to the relaxation of residual stresses.

Download Full-text

Application of preliminary low-temperature heating for cold forming of complex parts on cold former

Blanking productions in mechanical engineering (press forging, foundry and other productions) ◽

10.36652/1684-1107-2021-19-9-396-399 ◽

2021 ◽

pp. 396-399

Author(s):

V.Yu. Lavrinenko ◽

Yu.A. Lavrinenko ◽

R.S. Fayruzov ◽

A.S. Ayrapetyan ◽

A.S. Kirsanov

Keyword(s):

Low Temperature ◽

Heating Temperature ◽

Experimental Studies ◽

Life Time ◽

Cold Forging ◽

Flow Curves ◽

Cold Forming ◽

40Kh13 Steel ◽

Temperature Heating ◽

Complex Parts

The results of experimental studies of flow curves of 32CrB4, 20G2R and 1.4034 (analogue of 40Kh13 steel) steels at different heating temperature of workpieces are presented. Rational intervals of preliminary lowtemperature heating of workpieces made of studied steels are obtained. It allows to decrease forces during cold forging, loads on the working tool and to increase of tool life time up to 2 times.

Download Full-text