Cost Comparison of Low-Temperature Heat Production and Supply to the Industrial and Domestic Sector by Means of Nuclear Energy

1978 ◽  
Vol 38 (2) ◽  
pp. 304-311 ◽  
Author(s):  
F. K. Boese ◽  
W. Breyer ◽  
R. Pruschek
Keyword(s):  
Low Temperature ◽  
Heat Production ◽  
Nuclear Energy ◽  
Cost Comparison ◽  
Temperature Heat

scholarly journals Large-scale heat pumps in sustainable energy systems: System and project perspectives

2007 ◽  
Vol 11 (3) ◽  
pp. 143-152 ◽  
Author(s):  
Morten Blarke ◽  
Henrik Lund
Keyword(s):  
Low Temperature ◽  
Heat Source ◽  
Heat Production ◽  
Large Scale ◽  
Energy System ◽  
Heat Pumps ◽  
Production Costs ◽  
Coefficient Of Performance ◽  
Operational Mode ◽  
Temperature Heat

This paper shows that in support of its ability to improve the overall economic cost-effectiveness and flexibility of the Danish energy system, the financially feasible integration of large-scale heat pumps (HP) with existing combined heat and power (CHP) plants, is critically sensitive to the operational mode of the HP vis-?-vis the operational coefficient of performance, mainly given by the temperature level of the heat source. When using ground source for low-temperature heat source, heat production costs increases by about 10%, while partial use of condensed flue gasses for low-temperature heat source results in an 8% cost reduction. Furthermore, the analysis shows that when a large-scale HP is integrated with an existing CHP plant, the projected spot market situation in The Nordic Power Exchange (Nord Pool) towards 2025, which reflects a growing share of wind power and heat-supply constrained power generation electricity, further reduces the operational hours of the CHP unit over time, while increasing the operational hours of the HP unit. In result, an HP unit at half the heat production capacity as the CHP unit in combination with a heat-only boiler represents as a possibly financially feasible alternative to CHP operation, rather than a supplement to CHP unit operation. While such revised operational strategy would have impacts on policies to promote co-generation, these results indicate that the integration of large-scale HP may jeopardize efforts to promote co-generation. Policy instruments should be designed to promote the integration of HP with lower than half of the heating capacity of the CHP unit. Also it is found, that CHP-HP plant designs should allow for the utilization of heat recovered from the CHP unit?s flue gasses for both concurrent (CHP unit and HP unit) and independent operation (HP unit only). For independent operation, the recovered heat is required to be stored. .

MODELING OF AN ORGANIC RANKINE CYCLE FOR LOW TEMPERATURE HEAT SOURCES

2018 ◽  
Author(s):  
Arthur Batista Martins Lott ◽  
Arthur Pacheco Luz ◽  
João Arthur Daconti Silva ◽  
Cristiana Maia ◽  
Sergio Hanriot
Keyword(s):  
Low Temperature ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Heat Sources ◽  
Temperature Heat

JESSAIR

Alloy Digest ◽  
1965 ◽  
Vol 14 (1) ◽  
Keyword(s):  
Heat Treatment ◽  
Fracture Toughness ◽  
Low Temperature ◽  
Physical Properties ◽  
Heat Treating ◽  
Bend Strength ◽  
Steel Company ◽  
Temperature Heat ◽  
Temperature Heat Treatment ◽  
Manganese Chromium

Abstract Jessair is a manganese, chromium, molybdenum alloy steel combining the deep harding characteristics of air-hardening steels with the simplicity of low temperature heat treatment possible in many oil-hardening steels. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and bend strength as well as fracture toughness and fatigue. It also includes information on forming, heat treating, machining, and joining. Filing Code: TS-157. Producer or source: Jessop Steel Company.

Changes in color characteristics of culinary products from turkey meat produced with the use of low-temperature heat treatment

Vsyo o myase ◽  
2020 ◽  
pp. 22-24
Author(s):  
Nasonova V.V. ◽  
◽  
Tunieva E.K. ◽  
Motovilina A.A. ◽  
Mileenkova E.V. ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Low Temperature ◽  
Production Technology ◽  
Meat Products ◽  
Oxidation Products ◽  
Turkey Meat ◽  
Color Characteristics ◽  
Low Temperature Processing ◽  
Temperature Heat ◽  
Temperature Heat Treatment

The paper presents the results of the study on the effect of low-temperature heat treatment on color characteristics and protein oxidation products depending on the method, temperature and duration of heat treatment of culinary products from turkey meat. At present, the use of low-temperature processing in the production technology for meat products with improved organoleptic indices is a topical direction.

Dynamics and magnetic properties of NO molecules encapsulated in open-cage fullerene derivatives evidenced by low temperature heat capacity

2021 ◽  
Author(s):  
Yoji Horii ◽  
Hal Suzuki ◽  
Yuji Miyazaki ◽  
Motohiro Nakano ◽  
Shota Hasegawa ◽  
...  
Keyword(s):  
Heat Capacity ◽  
Magnetic Properties ◽  
Low Temperature ◽  
Magnetic Anisotropy ◽  
Fullerene Derivatives ◽  
Molecular Cages ◽  
Temperature Heat ◽  
Low Temperature Heat Capacity

Heat capacity analyses revealed dynamics and magnetic anisotropy of NO molecules confined in molecular cages.

A review of solar-driven short-term low temperature heat storage systems

2021 ◽  
Vol 141 ◽  
pp. 110824
Author(s):  
Yongliang Shen ◽  
Shuli Liu ◽  
Abdur Rehman Mazhar ◽  
Xiaojing Han ◽  
Liu Yang ◽  
...  
Keyword(s):  
Low Temperature ◽  
Heat Storage ◽  
Storage Systems ◽  
Short Term ◽  
Temperature Heat

scholarly journals Analysis and Comparison of Some Low-Temperature Heat Sources for Heat Pumps

Energies ◽  
2019 ◽  
Vol 12 (10) ◽  
pp. 1853 ◽  
Author(s):  
Pavel Neuberger ◽  
Radomír Adamovský
Keyword(s):  
Heat Transfer ◽  
Low Temperature ◽  
Heat Source ◽  
Heat Pump ◽  
Heat Exchangers ◽  
Ambient Air ◽  
Heat Transfer Fluid ◽  
Heat Sources ◽  
Ground Heat Exchangers ◽  
Temperature Heat

The efficiency of a heat pump energy system is significantly influenced by its low-temperature heat source. This paper presents the results of operational monitoring, analysis and comparison of heat transfer fluid temperatures, outputs and extracted energies at the most widely used low temperature heat sources within 218 days of a heating period. The monitoring involved horizontal ground heat exchangers (HGHEs) of linear and Slinky type, vertical ground heat exchangers (VGHEs) with single and double U-tube exchanger as well as the ambient air. The results of the verification indicated that it was not possible to specify clearly the most advantageous low-temperature heat source that meets the requirements of the efficiency of the heat pump operation. The highest average heat transfer fluid temperatures were achieved at linear HGHE (8.13 ± 4.50 °C) and double U-tube VGHE (8.13 ± 3.12 °C). The highest average specific heat output 59.97 ± 41.80 W/m2 and specific energy extracted from the ground mass 2723.40 ± 1785.58 kJ/m2·day were recorded at single U-tube VGHE. The lowest thermal resistance value of 0.07 K·m2/W, specifying the efficiency of the heat transfer process between the ground mass and the heat transfer fluid, was monitored at linear HGHE. The use of ambient air as a low-temperature heat pump source was considered to be the least advantageous in terms of its temperature parameters.

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