scholarly journals Impact of the Tax Reform Act of 1986 on district heating and cooling systems

1988 ◽  
Author(s):  
J. Stavrou ◽  
D. E. Karvelas
Keyword(s):  
Tax Reform ◽  
District Heating ◽  
Cooling Systems ◽  
Heating And Cooling

scholarly journals Dynamic equation-based thermo-hydraulic pipe model for district heating and cooling systems

2017 ◽  
Vol 151 ◽  
pp. 158-169 ◽  
Author(s):  
B. van der Heijde ◽  
M. Fuchs ◽  
C. Ribas Tugores ◽  
G. Schweiger ◽  
K. Sartor ◽  
...  
Keyword(s):  
Dynamic Equation ◽  
District Heating ◽  
Cooling Systems ◽  
Heating And Cooling ◽  
Pipe Model

scholarly journals A Novel Method for Designing Fifth-Generation District Heating and Cooling Systems

2021 ◽  
Vol 246 ◽  
pp. 09001
Author(s):  
Marwan Abugabbara ◽  
Jonas Lindhe
Keyword(s):  
Analytical Solution ◽  
District Heating ◽  
Innovative Technology ◽  
Complete Agreement ◽  
Fluid Temperature ◽  
Existing Buildings ◽  
Cooling Systems ◽  
Heating And Cooling ◽  
Fifth Generation ◽  
Novel Method

District heating and cooling systems have been undergoing continuous development and have now reached the fifth-generation. In this innovative technology, connected buildings share local excess energy that otherwise would be wasted, which consequently reduces primary energy demands and carbon emissions. To date, the issue of implementing fifth-generation district systems on existing buildings has received scant attention, and our research addresses this challenging gap by proposing a novel method for designing these systems. We first explain the possible thermal interactions between connected buildings, and then present an analytical solution for the network energy balance, pipe design, and the prediction of fluid temperature under a fixed temperature difference control strategy. The analytical solution was validated against numerical simulations performed on 11 existing buildings located in Lund, Sweden using Modelica models. A diversity index metric between heating and cooling demands was also included in these models to assess the efficiency of the district system in the building cluster. The results from the analytical and numerical solutions were in complete agreement since Modelica is an equation-based modelling language. The developed models pave the way towards future investigations of different temperature control strategies and new business models that arise from the shift to the fifth-generation.

Power Piping

2010 ◽  
Keyword(s):  
High Temperature ◽  
District Heating ◽  
Cooling Systems ◽  
Heating Systems ◽  
Geothermal Heating ◽  
Heating And Cooling ◽  
Piping Systems ◽  
Minimum Requirements ◽  
Pressure Water ◽  
Temperature Water

ASME B31.1 prescribes minimum requirements for the design, materials, fabrication, erection, test, inspection, operation, and maintenance of piping systems typically found in electric power generating stations, industrial and institutional plants, geothermal heating systems, and central and district heating and cooling systems.It also covers boiler-external piping for power boilers and high-temperature, high pressure water boilers in which steam or vapor is generated at a pressure of more than 15 psig; and high temperature water is generated at pressures exceeding 160 psig and/or temperatures exceeding 250 degrees F.

scholarly journals Long-term Green Innovation Opportunities Within the Hungarian District Heating Sector Towards 2030

2016 ◽  
Vol 4 (1) ◽  
pp. 12-24
Author(s):  
Balint Horvath ◽  
Maria Borocz ◽  
Sandor Zsarnoczai ◽  
Csaba Fogarassy
Keyword(s):  
Natural Gas ◽  
District Heating ◽  
Heating System ◽  
Simple Fact ◽  
District Heating System ◽  
Primary Input ◽  
Cooling Systems ◽  
The Public ◽  
Heating And Cooling

Abstract Natural gas is still the primary input of the Hungarian heating and cooling systems, therefore it still makes most of the overheads. One of the main obstacles of a competitive district heating system is the public opinion which still considers this service more expensive than the traditional heating forms. According to the absolute numbers this assumption might be valid but from a more accurate economic perspective, heat production has more aspects to stress. Most people forget about the simple fact that the maintenance costs of natural gas based systems are rather outsourced to the consumer than in the case of district heating. Furthermore, the uneven rate of the fixed and variable costs of this technology does not prove to be optimal for service developments. Investigating the future tendencies highlight that encouraging the efficiency improvement of district heating and the spread of technological innovation in the sector does not belong to the top priorities. Still, avoiding this problem it could lead serious deadweight losses in the case of the heating sector.

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