Heating system of a five-story residential building located in the city of Nizhny Novgorod

Contents

Summary

Introduction

1. Source Data

1.1 Ambient air parameters

1.2 Internal Air Parameters

1.3 Technical characteristics of the external fence

2. Thermal balance of the building

3. Feasibility Study

4. Hydraulic calculation of double-tube system

5. Selection of heating devices for a two-tube system

6. Hydraulic calculation of single tube heating system by resistance characteristics method

7. Selection of heating devices for single tube system

8. Selection of elevator

Application

List of literature

Summary

In this course project, a heating system for a five-story residential building located in the city of Nizhny Novgorod was calculated. The following calculations were carried out: technical and economic calculation, hydraulic calculation of a single-tube system using the method of resistance characteristics, hydraulic calculation of a double-tube system by specific linear pressure losses, selection and calculation of heating devices were carried out, pressure distributions of the main and two secondary rings for both single-tube and two-tube systems were built.

Introduction

Heating systems are designed to create and maintain the necessary air temperature in the cold season. This temperature should be favorable for people in the premises, and in production buildings provide normal conditions for technological processes.

Heating systems have a significant impact on the safety of buildings.

When designing the heating system of the building, two main issues are solved: heat losses are determined by external enclosures of the premises; heating devices, pipelines and other parts of the system are calculated.

In this course design, a combined heating system was designed (in one part of the building, a single-tube heating system was designed, and in the second half of the building, a double-tube heating system) with the associated movement of the coolant and with the upper routing of the highways. The purpose of this association was to make clear the complexity of the calculation and not the feasibility of designing a double-tube system (since it has a high metal consumption, is poorly adjustable, due to the presence of natural pressure arising in pipelines and heating devices, etc.), as well as the inability to combine different systems (namely single-tube and double-tube) into one, due to their poor joint work .

The installation of heating devices is designed at the external enclosing structures under the window openings, in order to block the cold air flow. External piping in the building is used. Regulation of a one-pipe heating system is made by CRC (the crane regulating a checkpoint) cranes, and in two-pipe KRD cranes (crane of double adjustment). Shutoff valves of the following type are also provided: drain and ball cranes. To compensate for the pressure at the base of the riser, a bend is made when connected to the return line. Offset jumpers are provided on risers of single-tube system. Air from the system is removed through air collectors located on the upper dilution lines before the last risers in the system (risers 7.14). The system is designed from light steel water and gas pipes as per GOST 326275 * with roughness factor ksh = 0.2mm .

In the project, cast iron radiators of the MS90108 grade were used and calculated as heating devices.

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