HyHeat4industry

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This project aims to provide a system concept to reach high renewable heating fractions using a concept that involves several technological elements, as explained in the proposal. The primary aim is to design a renewable heating system for industries in a temperature range of 160 to 200 °C and evaluate the techno-economic feasibility. Problem descriptionThe solar resource has daily and seasonal variations reflected in any solar-driven energy technology. For a typical solar PV system, the grid acts as a large battery which balances the production and demand with minimal waste of electricity. However, the solar heating systems are often retrofitted with individual/stand-alone boilers in the industries. Furthermore, most industries have constant heating demand throughout the day (and year). Therefore, if a solar heating system (SHS) is designed without any thermal storage, then the fraction of the overall heat demand met with solar collectors (solar fraction) can be limited. Having a low solar fraction allows the solar production to be lower than the user's heat demand, thus increasing the system's utilization. Typically, SHIP systems are designed with less than 25% solar fraction. To increase the solar fraction, thermal storage is the center of the puzzle. However, the temporal variation in supply, and demand, bring the necessity to optimize the storage volume. If the solar fraction is kept linear with increasing storage volume (i.e., thus storing all the heating produced by solar collectors), then the economic benefits decrease at high solar fraction due to reducing energy storage density. This situation puts a financial limit to the maximum solar fraction achievable. As the storage results in an increased LCOH at high solar fraction, there is an optimized solar fraction when the LCOH of the solar field is lower than the competing fuel. This optimized solar fraction can lie between 25% to 75% depending on the climate, load profile, etc. As industries are now looking for near 100% renewable heating systems, solar thermal needs to collaborate with other technological alternatives in combination with solar thermal to provide a solution to the industries. This project aims to provide a system concept to reach high renewable heating fractions using a concept that involves several technological elements, as explained in the proposalOverall system concept. The project aims to evaluate the techno-economic feasibility of an innovative hybrid concept of:a) Solar thermal collector (with novel thermal storage) andb) PV-driven steam-generating high-temperature heat pump (HTHP)The aim is to design a renewable heating system for industries in a temperature range of 160 to 200 °C and evaluate the techno-economic feasibility. The system concept diagram is shown in Figure 3. There are four important elements of the system a) Solar thermal collectors b) Novel thermal storage c) Photovoltaic modules, andd) Steam generating high-temperature heat pump (HTHP).

Project Idea Metadata

• Project Idea Name: HyHeat4industry
• Date: 3/15/2022 10:23:40 PM
• Administrators:
  • Puneet Saini

Project Idea Description

Problem description

The solar resource has daily and seasonal variations reflected in any solar-driven energy technology. For a typical solar PV system, the grid acts as a large battery which balances the production and demand with minimal waste of electricity. However, the solar heating systems are often retrofitted with individual/stand-alone boilers in the industries.

Furthermore, most industries have constant heating demand throughout the day (and year). Therefore, if a solar heating system (SHS) is designed without any thermal storage, then the fraction of the overall heat demand met with solar collectors (solar fraction) can be limited. Having a low solar fraction allows the solar production to be lower than the user's heat demand, thus increasing the system's utilization. Typically, SHIP systems are designed with less than 25% solar fraction.

To increase the solar fraction, thermal storage is the center of the puzzle. However, the temporal variation in supply, and demand, bring the necessity to optimize the storage volume. If the solar fraction is kept linear with increasing storage volume (i.e., thus storing all the heating produced by solar collectors), then the economic benefits decrease at high solar fraction due to reducing energy storage density. This situation puts a financial limit to the maximum solar fraction achievable.

As the storage results in an increased LCOH at high solar fraction, there is an optimized solar fraction when the LCOH of the solar field is lower than the competing fuel. This optimized solar fraction can lie between 25% to 75% depending on the climate, load profile, etc.

As industries are now looking for near 100% renewable heating systems, solar thermal needs to collaborate with other technological alternatives in combination with solar thermal to provide a solution to the industries. This project aims to provide a system concept to reach high renewable heating fractions using a concept that involves several technological elements, as explained in the proposal

Overall system concept.

The project aims to evaluate the techno-economic feasibility of an innovative hybrid concept of:

a) Solar thermal collector (with novel thermal storage) and

b) PV-driven steam-generating high-temperature heat pump (HTHP)

The aim is to design a renewable heating system for industries in a temperature range of 160 to 200 °C and evaluate the techno-economic feasibility. The system concept diagram is shown in Figure 3. There are four important elements of the system

a) Solar thermal collectors

b) Novel thermal storage

c) Photovoltaic modules, and

d) Steam generating high-temperature heat pump (HTHP).

This project aims to provide a system concept to reach high renewable heating fractions using a concept that involves several technological elements, as explained in the proposal. The primary aim is to design a renewable heating system for industries in a temperature range of 160 to 200 °C and evaluate the techno-economic feasibility.