Abstract
The application of thermal energy storage (TES) is an effective way of improving the power load regulation capability of combined heat and power (CHP) generating units. In this paper, a theoretical investigation on the thermal energy storage system of a CHP unit that employs the microencapsulated phase change material slurry (MPCMS) as the working fluid is carried out. The results indicate that the microcapsule particle internal melting rate is progressively small; 90% latent heat can be absorbed in 63% total melting time. The melting time of particles in micron is very short, and the diameter is an important factor for microcapsule melting. For the MPCMS flow in a circular tube, the temperature distribution between laminar flows and turbulent flows is different. In a turbulent flow, there is an approximate isothermal section along the tube, which cannot be found in a laminar flow. Additionally, a thermal storage system with MPCMS as heat transfer fluid for a CHP unit is proposed. A case study for a 300 MW CHP unit found that the use of an MPSMS thermal energy storage system increases the power peak shaving capacity by 81.4%. This indicates that the thermal storage system increases the peak shaving capacity of cogeneration units.
Highlights
Wind energy technology is one of the most important renewable energy technologies for power generation
Combined heat and power (CHP) generation technology has recently developed a great deal in North China and this district is abundant in wind power
In order to overcome this problem, there is an urgent demand for increasing the power load regulation capability of CHP units
Summary
Wind energy technology is one of the most important renewable energy technologies for power generation. Microencapsulated phase change material slurry (MPCMS) is the mixture of microencapsulated phase change material (MPCM) particles and a single-phase fluid It is a micro ball with a strong shell and phase change material (PCM) as its core. There have been numerous investigations, theoretical and experimental, of MPCMS due to its excellent performance in heat transfer and thermal energy storage [5,6,7,8,9,10,11,12,13]. Wang and Niu [17] investigated the performance of a new air conditioning system comprised of the chilled ceilings and the MPCMS storage tank using Hong Kong’s weather data and hexadecane (C16 H34 ) capsules as the PCM chemical. MPCMS as a thermal energy storage medium in a large-scale CHP unit is theoretically investigated. The unit’s thermal physical characteristics, as well as its flow and heat transfer performances in a tube, have been discussed in detail
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
