Detailed Explanation of Common Problems in Building Heating Design

Thread Content

A detailed analysis of common problems in building heating design: China’s construction industry is developing at a rapid pace. Throughout this development, significant progress has been made in the field of building heating. However, there are still some common issues in the design of building heating systems. These problems cause serious inconvenience to people’s lives. Only by ensuring that the design of building heating systems is scientific and rational can such systems operate properly, thereby bringing convenience to people’s lives. Common problems in plumbing design: Issues with entrance devices. There are serious problems associated with the entrance devices in hot water heating systems. During the process of designing building plumbing systems, designers must take into account these issues related to entrance devices. However, many designers tend to overlook them. In some building heating projects, the designers responsible for creating the blueprints fail to label the entrance devices, which creates significant difficulties during subsequent review of the plans. Moreover, some people also make mistakes during this review process. During the process of designing HVAC construction drawings, designers need to establish corresponding ventilation design standards; in such cases, it is necessary to follow these standards strictly to ensure that the design of the inlet devices meets the basic requirements. During the design process, two-stage filters should be installed on the water supply pipes at the heating inlets, and the number of heating inlets must be determined in a scientific and reasonable manner so that building heating can meet people’s basic needs. Consideration must also be given to the connection between the indoor HVAC system and the outdoor pipelines. However, even when designing the inlets, there remains a serious problem of having too many inlets. The issue of pre-arranging openings: When laying plumbing pipes, it is necessary to pre-prepare holes for these pipes. In such cases, it is essential to ensure that the overall building structure is scientific and rational. The openings prepared must be properly positioned, sized, and arranged in terms of elevation. However, there are various quality issues that arise during this process; in other words, people often overlook the importance of controlling the elevation of these openings. Elevation plays a crucial role in the proper preparation of openings. If this aspect is neglected, it can lead to waste of construction materials and financial losses during construction. Additionally, it has a significant impact on the operation of the heating system. If the elevation of the drainage openings is incorrect, serious consequences can occur. An unreasonable elevation design can also result in poor drainage, preventing the heating system from functioning properly during building construction. Therefore, during the engineering design phase, it is vital to arrange the openings in a scientific manner, taking into account both comprehensiveness and accuracy in the design. The design considerations regarding the temperature of the heating medium: During the design process, the temperature of the heating medium must meet the basic requirements of safety, cost-effectiveness, and comfort. Comprehensive consideration must be given to this temperature in order to meet the actual needs of the heating system. Especially in the case of underfloor heating, if the area is frequented by people, the temperature should be kept between 24°C and 26°C; there is also an upper limit for this temperature, which is 28°C. In areas where people are present, the temperature should be maintained around 28°C–30°C, with a maximum of 32°C. If no one is in the area, a temperature of around 35°C–40°C can be used, but the maximum temperature should not exceed 42°C. The issue of excessive charges for heat metering: In this context, \"heat\" is a commodity, and the issue of measuring and charging based on its usage is closely related to people’s lives. If the measurement of heat usage is too high, it can pose safety risks to the residents involved and impose a heavy burden on them; on the other hand, if the measurement is too low, residents will pay less, which in turn affects the economic profitability of businesses. Therefore, it is necessary for heat measurement to be both scientific and reasonable. In our country, residents pay the heating costs directly, and it is necessary to implement individual metering for residential buildings. This has a significant impact on the economic efficiency of the country. Such a metering system is also a key focus of the heat metering reform efforts in our country. To put this system into practice, it is essential to carry out scientific calculations of heat loads, and at the same time, the methods used for heating design must be thoroughly revised. Water supply and waterproofing issues: The pipes and fittings used for domestic water supply and drainage are different from those used for heating systems. Pipes and fittings used for domestic water supply and drainage must meet the sanitary requirements for pipes used in domestic water systems. Currently, plastic pipes and aluminum-plastic composite pipes are the **commonly used pipes for domestic water supply and drainage, as these two types of pipes are resistant to corrosion; however, their impact resistance is poor. Now, most of the water supply and drainage risers as well as the heating risers are installed in the same shaft, which results in unstable water pipes. The waterproofing issues in building plumbing systems are also very important. Leakage is one of the common quality problems in construction projects. Issues such as improper burial of pipes above ground, oversized holes in floor slabs through which vertical pipes pass, inadequate sealing of these holes, and improper handling of pipe connections can all lead to leaks in building plumbing systems. Scientific management of heating systems is essential; when designing such systems, it is important first to ensure that the layout of equipment in the boiler room is reasonable ； Secondly, the pipeline network design should involve thorough and accurate hydraulic calculations as well as calculations related to the fans used for pumping air; appropriate pumps should be selected to ensure proper flow distribution and hydraulic balance among various users, thereby ensuring the proper functioning of the entire system and avoiding unnecessary energy losses. In addition, instruments and microcomputers are used to control the operation of the heating system; parameters such as supply and return water pressure and temperature, as well as the heat generation capacity of the boiler, are automatically monitored and displayed. The system’s water supply, combustion, and exhaust systems are automatically adjusted to enable scientific management and automated control, while regular maintenance of the equipment and systems is also carried out on a daily basis. Common issues in underfloor heating design; problems with construction drawings. The design of construction drawings is a crucial aspect of building underfloor heating systems. Only when these drawings are designed scientifically and reasonably can the performance quality of such heating systems be ensured. However, in many current building heating design documents, the information provided is incomplete; many building heating systems are not constructed in strict accordance with relevant regulations, and there are even omissions in the drawings. The design of construction drawings for underfloor heating should take into account parameters such as the thermal resistance of the floor finish material, the desired indoor temperature, and the effective heat dissipation area, which are determined through system calculations, in order to determine the spacing between the heating tubes. At the same time, those responsible for the design of heating systems using underfloor heating in buildings need to be well familiar with the properties and characteristics of various materials. Ensure the integration of design and construction, so as to effectively guide the construction process and reduce the difficulties involved in it. Design issues for underfloor heating main pipes. There are two calculation methods for designing underfloor heating main pipes. One is determined by the heating heat load and the temperature difference between the supply and return water temperatures, while the other must meet the minimum water flow rate requirements for the underfloor heating coils. The larger of the two values should be taken. If, during design, we determine the water flow rate based on the heating load and the temperature difference between the supply and return water temperatures, then insufficient flow can cause air pockets to disrupt the system’s circulation, resulting in air remaining in the heating system and thus preventing proper heating. Every aspect of building heating design is closely interconnected; each element is related to the others. A neglect in one detail can lead to deficiencies in other aspects, resulting in numerous problems within the entire heating design system. This causes significant difficulties in heating the building and severely affects the daily lives of its inhabitants. Therefore, building heating designers must take all relevant factors into consideration, pay attention to every detail, strive to resolve the issues encountered in building heating design, and improve the quality of such designs.