Status and analysis of the development of cross-seasonal sensible heat storage projects in the new century

Talking about a theoretical innovation in stairwell pressurization technology

To address the issue of airflow regulation and pressure relief (collectively referred to as "compensation") for pressurized air supply systems in stairwells, we briefly review the revisions and updates to the flue gas control chapter of the ASHRAE Handbook of HVAC Applications, which has been published in six editions since 1999, as well as the theoretical innovations and technical adjustments based on related research advances. It briefly reviews the revision and updating of the chapter on flue gas control in the ASHRAE Handbook - HVAC Application Subchapter in six editions since 1999, as well as the theoretical innovations and technical adjustments based on the progress of related researches. Combined with the actual situation in China, several problems in the process of implementing the relevant provisions of GB 51251-2017 Technical Standard for Building Smoke Prevention and Exhaust System are analyzed and suggestions for improvement are made.

Air flow balance commissioning of variable air volume air-conditioning systems

Variable air volume terminal unit (VAV BOX) is the core component of variable air volume air conditioning system. In this paper, with the help of building automation system (BAS) equipped with pressure-independent single-duct VAV BOX variable air conditioning system of stand-alone air volume debugging and duct system balance debugging is introduced.VAV BOX stand-alone air volume debugging is mainly VAV BOX air volume calibration, duct system balance debugging is mainly the opening of the manual damper debugging.

Optimization of capacity allocation of wind power hybrid storage and heating system for wind energy consumption and wind abandonment

In order to solve the problem of high energy consumption of buildings and serious wind abandonment in winter in the "Three North" region, a wind-power hybrid energy storage heating system composed of lithium batteries, solid heat storage devices and heat pump equipment is designed. Firstly, the output power of wind turbine is predicted based on BP neural network, and the typical daily load curve of heat supply is obtained by k-means clustering analysis; then, a capacity allocation optimization method of wind power hybrid energy storage heating system based on particle swarm optimization algorithm is proposed, and the objective function is constructed with the constraints of minimum total cost of the system and minimum wind abandonment; finally, the capacity of the hybrid energy storage heating system is compared between considering the wind abandonment condition and the wind abandonment condition; and the capacity of the hybrid energy storage heating system is compared between considering the wind abandonment condition and not considering the wind abandonment condition. Finally, the optimization results of the capacity allocation of the hybrid energy storage heating system are compared with and without considering wind abandonment. The study shows that the proposed optimization method can not only effectively reduce the wind abandonment rate, but also meet the demand for clean heating in winter in cold regions, providing a reference for the efficient use of renewable energy.