District cooling substation design and control to achieve high return temperatures

Jangsten, Maria; Lindholm, Torbjörn; Dalenbäck, Jan-Olof

doi:10.1016/j.energy.2022.123913

Cited by 3 publications

(2 citation statements)

References 24 publications

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“…For pointer meters and automatic devices in substations, Sun proposes a dynamic control strategy for substations based on online prediction and indoor temperature measurement [7]. Meanwhile, the substation pointer meter intelligent reading method and substation pointer meter detection [8] and identification method based on one-dimensional measurement line mapping [9] have appeared in recent years. In addition, some scholars also carried out research on the meter recognition algorithm of substation inspection robots [10], the two-needle meter reading recognition algorithm suitable for intelligent substation inspection robots [11] and the pointer meter reading recognition based on substation inspection robots [12].…”

Section: Introductionmentioning

confidence: 99%

A detection system and device for main variable temperature controller based on cloud platform

Yan

Luo

et al. 2023

Eighth International Conference on Electronic Technology and Information Science (ICETIS 2023)

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The main variable temperature controller has not achieved an automatic testing function so far, which consumes great labor and capital costs. The innovation of this paper is to achieve fully automatic and intelligent detection of the main variable temperature controller. We construct an intelligent testing equipment remote control system, including a remote monitoring and management system for testing equipment backstage, a mobile APP for testing equipment, an APP for receiving terminals, and an application service for the testing report interface, which realizes the function of remote management and viewing of reports. A fully automatic calibration device for the main substation thermostat is designed, including the inspected thermostat, constant temperature oil tank, calibrator, and graphic conversion device, which realizes the device to automatically complete the testing of substation-related devices. By designing the communication serial port of the device and developing the corresponding device on the cloud, the software and hardware are well integrated. The technical solution promotes the turnover rate and utilization rate of testing equipment and enhances the comprehensive management capability of testing equipment.

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Section: Introductionmentioning

confidence: 99%

A detection system and device for main variable temperature controller based on cloud platform

Yan

Luo

et al. 2023

Eighth International Conference on Electronic Technology and Information Science (ICETIS 2023)

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“…In order to have an efficient DHC system, it is necessary to have a large difference between the supply and return temperatures [24]. Since the supply temperature will be reduced in a future fourth generation of DHC systems [25], it will be important to achieve lower return temperatures [26]. A suitable solution for this development is a It is an emerging technology [28], and a hydronic pavement system may contribute to less GHG emissions than conventional snow clearance [29], [30].…”

mentioning

confidence: 99%

Energy Efficiency in the Residential, Service and Energy Sectors : Barriers, Drivers and System Studies

Blomqvist

2023

Linköping Studies in Science and Technology. Dissertations

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Despite the need for increased energy efficiency in the residential and service sector, cost-efficient energy conservation measures are not always implemented. This is explained by the existence of barriers to energy efficiency. By using surveys, the perception of barriers and drivers for energy efficiency in the Swedish residential and service sector is studied, together with changes in the perception of barriers and drivers during the 2010s. The perception of a lack of time or other priorities is the most hindering factor for implementing energy efficiency measures, along with the experience of a slim organization. On the other hand, the major drivers are reducing costs, followed by drivers of an organizational or behavioral nature. The results illustrate a challenging situation among publicly owned organizations, small organizations, and those in rural areas, as -relative to other groups -they experience barriers to a greater degree and drivers to a lesser extent. Positive factors that emerge between 2010 and 2020 are that energy strategies are integrated, and energy efficiency is given high priority throughout the organizations' working methods. Lastly, by using simulation and optimization model, energy end-use measures of (1) large-scale renovation of a multifamily building stock and (2) the use a hydronic pavement system for snow and ice clearance are studied. These are analyzed in terms of energy performance and GHG emissions based on different system boundaries. The results regarding the large-scale renovation of multifamily buildings reveal a potential conflict. The measure resulting in the best energy performance of the building, which may be the most desirable measure from a building owner's perspective, risks leading to larger greenhouse gas emissions. The conflict arises due to different use of system boundaries. A hydronic pavement system -a rarely used application in present-day district heating systems -proves to be a possible sustainable solution and a suitable application for the future generation of a low-temperature district heating system. The results underline the importance of understanding system boundaries in general, but also when considering energy efficiency improvements. An overly narrow system perspective and boundaries can lead to unwanted sub-optimizations, with higher greenhouse gas emissions as a consequence. hydronic pavement system. A hydronic pavement system can use low-grade temperature heat carriers, such as the return water in a DHC system. A hydronic pavement system consists of embedded pipes in the pavement structure, where heat is transported by circulating water or other heat media. The objective is to prevent snow and ice formation that may cause slipperiness during winter periods. In Sweden, the use of hydronic pavement systems accounts for an annual district heating use of , making this a little used application but with promise for development.

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Comparative energy performance evaluation and uncertainty analysis of two building archetype development methodologies: A case study of high-rise residential buildings in Qatar

Moujahed

Sezer

Hou

et al. 2022

Energy and Buildings

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District cooling substation design and control to achieve high return temperatures

Cited by 3 publications

References 24 publications

A detection system and device for main variable temperature controller based on cloud platform

A detection system and device for main variable temperature controller based on cloud platform

Energy Efficiency in the Residential, Service and Energy Sectors : Barriers, Drivers and System Studies

Comparative energy performance evaluation and uncertainty analysis of two building archetype development methodologies: A case study of high-rise residential buildings in Qatar

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