![]() ![]() ![]() Deciding on which liner is best often depends on your budget, heating use, and other specifications that can vary depending on your unique situation. If you are looking to install a liner for the first time or your liner needs a replacement, a professional installer can help you determine which option is best for you. Each option comes with a variety of pros and cons. There are three main types of flue liners commonly installed within a home. Your home, chimney, and flue liner all work together to provide the combustion air you need to maintain a fire while also venting any potential harmful byproducts out. Without drawing the combustion air out, trying to start a fire would be impossible. Hot, buoyant gases travel up to the top and exit out of the chimney flue cap. ![]() Heat rises, which is why your upstairs always feels warmer than the lower floors. It is essentially an exhaust pipe that carries any harmful gases or debris safely outdoors. It is a vertical passageway that transports waste gas outside. What is a flue liner?Ī flue liner is located inside your chimney. With no moving parts and little maintenance, flue liners are a worthwhile investment that can last for decades. Without a functioning and safe flue for your fireplace, soot, fumes, and harmful byproducts like creosote, which is created from burning wood, can circulate throughout your home, potentially threatening the health and well-being of the pets and humans inside. The main purpose of your chimney is to vent combustion products into the outdoors. Your liner is created to ensure you stay warm without the fear of causing an unintended fire or carbon monoxide leak entering your home. Flues are a necessity if you heat your home with propane or natural gas. Most potential buyers are willing to pay more for a home that has a flue versus one without. Flue liners help to keep your home cozy and comfortable, making them valuable assets.Ĭhimney and fireplace flues also add value to your home if you ever intend to sell. However, if you don’t, you may experience several complications when it comes to the quality of your chimney and its ability to perform long-term. If your home has a chimney, you likely already have a flue liner. Flue liners are a conduit inside a chimney made from either clay, ceramic, or metal materials. The first author would also like to acknowledge funding from National Natural Science Foundation of China (52106050), Natural Science Foundation of Shanghai (Foundation of Shanghai (21ZR1431800) and Shanghai Science and Technology Commission Young Talent Sailing Program (20YF1419100).Flue liners have an important role to play in ensuring the long life and safe use of your chimney. The authors would like to thank the financial support from EPSRC Global Challenges Research Fund (EP/P028829/1). This distinct thermo-flow behavior, identified for the first time to the authors’ knowledge, may be harnessed to improve the performance of passive heat exchangers. Interestingly, at the intermediate horizontal pitch (pitch/diameter≈2.5), the flow pattern switches from plume-dominant to chimney-dominant over a minor increase of the vertical pitch (from 4.5 to 6 diameters), leading to significant augmentation in natural draft velocity and heat transfer on cylinder surfaces. For all the vertical distances computed in the two-row thermal chimney model, the flow pattern stays in a plume-dominant mode at the large horizontal pitch and a chimney-dominant mode at the small horizontal pitch. ![]() It is found that the horizontal pitch influences the balance between the chimney effect and the blockage effect, thus has an optimum with respect to the natural draft velocity. Key findings are then substantiated and examined by URANS. Parametric study with varying horizontal and vertical pitches is implemented by RANS with transition SST model. To address the scarcity of natural convection research for the tube array with three or more columns of horizontally-aligned cylinders, this paper conducts RANS/URANS simulations for multiple cylinder columns in one or two rows, validated by particle-image velocimetry and heat transfer measurements. ![]()
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