HVAC System最新文献

HVAC System Pub Date : 2018-11-14 DOI: 10.5772/INTECHOPEN.77205

A. Ademola

引用次数: 0

Air Conditioning Systems with Dual Ducts: Innovative Approaches for the Design of the Transport Network of the Air 双管道空调系统:空气输送网络设计的创新方法

HVAC System Pub Date : 2018-11-14 DOI: 10.5772/intechopen.80093

A. D'Orazio

{"title":"Air Conditioning Systems with Dual Ducts: Innovative Approaches for the Design of the Transport Network of the Air","authors":"A. D'Orazio","doi":"10.5772/intechopen.80093","DOIUrl":"https://doi.org/10.5772/intechopen.80093","url":null,"abstract":"We present two methods for sizing the network for the transport of the air, from the air handling unit to the terminal units, for a dual duct system, where air flows in the “ cold ” duct at a temperature less than the ambient temperature, while air flows in the “ hot ” duct at a temperature higher than the ambient temperature. The methods, compared to the traditional design criteria, lead to a reduction of channel size and, therefore, of overall network size and cost as well. The first method requires the “ cold ” channel to transport air at a temperature value slightly lower (1 ÷ 2 (cid:1) C) than the minimum inlet temperature (variable with time) required by the zones. The second requires the “ hot ” channel to transport air at a temperature value slightly higher (1 ÷ 2 (cid:1) C) than the maximum inlet temperature (variable with time) required by the zones. The methods have been applied to some reference networks. The saving of side surface of the networks varies between 14 and 27% with respect to the traditional approach; the constraint on the maximum speed of the air through the ducts is always respected, while this does not always occur with traditional criteria.","PeriodicalId":267436,"journal":{"name":"HVAC System","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129960030","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Solution of Private Problems of Optimization for Engineering Systems 工程系统优化私有问题的求解

HVAC System Pub Date : 2018-11-14 DOI: 10.5772/intechopen.80520

A. Melekhin

引用次数: 1

Improving the Vehicular Engine Pre-Start and After-Start Heating by Using the Combined Heating System 利用联合供暖系统改善汽车发动机启动前和启动后加热

HVAC System Pub Date : 2018-11-14 DOI: 10.5772/INTECHOPEN.79467

I. Gritsuk, V. Mateichyk, M. Śmieszek, V. Volkov, Y. Gutarevych, V. Aleksandrov, R. Symonenko, V. Verbovskiy

引用次数: 0

Numerical Approach for the Design of Cost-Effective Renovation of Heating System Control in Buildings 建筑采暖系统控制成本效益改造设计的数值方法

HVAC System Pub Date : 2018-11-05 DOI: 10.5772/INTECHOPEN.78613

A. Carbonari, M. Vaccarini, Emanuela Quaquero

{"title":"Numerical Approach for the Design of Cost-Effective Renovation of Heating System Control in Buildings","authors":"A. Carbonari, M. Vaccarini, Emanuela Quaquero","doi":"10.5772/INTECHOPEN.78613","DOIUrl":"https://doi.org/10.5772/INTECHOPEN.78613","url":null,"abstract":"This chapter focuses on advanced tools for transient energy simulation of existing buildings. Budget constraints often hinder the possibility of implementing large-scale retrofit projects. As a consequence, designers must work out low-cost renovation, which asks for a deep knowledge of the current state of the buildings. Furthermore, the performances of heating plants in existing buildings can be enhanced through the improvement of the control of the system. These types of retrofit actions can be carried out with a limited budget, but asks for the availability of very accurate transient energy simulation tools, which can compare the current and the renovated scenarios. On top of them, cost–benefit analyses can be developed. In this chapter, a model of a small hospital is developed in the Dymola/Modelica environment. The high flexibility of the transient simulation model and the very good agreement between numerical estimations and measurements are shown. Then, one scenario regarding enhanced regulation of the heating system by means of a customized ambient temperature control system is developed, and the expected energy savings are estimated.","PeriodicalId":267436,"journal":{"name":"HVAC System","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134476032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Techno-Economic Analysis of a Peltier Heating Unit System Integrated into Ventilated Façade 与通风建筑相结合的Peltier供热机组系统技术经济分析

HVAC System Pub Date : 2018-11-05 DOI: 10.5772/INTECHOPEN.76642

L. Salgado-Conrado, C. Martín-Gómez, María Ibáñez Puy, José A. Fernández

{"title":"Techno-Economic Analysis of a Peltier Heating Unit System Integrated into Ventilated Façade","authors":"L. Salgado-Conrado, C. Martín-Gómez, María Ibáñez Puy, José A. Fernández","doi":"10.5772/INTECHOPEN.76642","DOIUrl":"https://doi.org/10.5772/INTECHOPEN.76642","url":null,"abstract":"This chapter aims to describe the conceptual design and operating mode of an innovative thermoelectric heating unit (THU) prototype in a heating mode. Firstly, the conceptual design of THU system and improvements are described to investigate the effects of design in the thermal performance. Secondly, the THU prototype was compared with a conventional air-conditioning system using the typical economic indicators (investment costs, maintenance costs and operational costs). The results indicate that the overall cost of this project was approximately 84,860 Euros, of which 69.27% of the total investment cost are for the engineering costs. By focused on the investment costs of the THU system, the results reveal that the conventional air-conditioning system is economically viable than a THU system. The analysis shows that the design has a direct effect on the costs. The maintenance costs show that THU v1.2 prototype is more economically viable in maintenance than the conventional air-conditioning system. Likewise, the operational costs show that THU v1.2 had a more stable thermal behaviour than the conventional air-conditioning system. Based on the results, the authors concluded that the THU system could be a viable option for a heating room.","PeriodicalId":267436,"journal":{"name":"HVAC System","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128457881","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

HVAC Techniques for Modern Livestock and Poultry Production Systems 现代畜禽生产系统的暖通空调技术

HVAC System Pub Date : 2018-11-05 DOI: 10.5772/INTECHOPEN.78785

S. Hoff

引用次数: 1

Methodology of Energy Management in Housing and Buildings of Regions with Hot and Dry Climates 能源管理的方法在住房和建筑与炎热和干燥气候地区

HVAC System Pub Date : 2018-11-05 DOI: 10.5772/INTECHOPEN.78341

C. Pérez-Tello, H. Campbell-Ramírez, José AlejandroSuástegui-Macías, Maria Reinhardt

{"title":"Methodology of Energy Management in Housing and Buildings of Regions with Hot and Dry Climates","authors":"C. Pérez-Tello, H. Campbell-Ramírez, José AlejandroSuástegui-Macías, Maria Reinhardt","doi":"10.5772/INTECHOPEN.78341","DOIUrl":"https://doi.org/10.5772/INTECHOPEN.78341","url":null,"abstract":"In this chapter, power consumption and electrical demand in buildings or housing due to the utilization of HVAC systems are shown to be intimately linked to construction materials. This work proposes a methodology of energy management intended to analyze and evaluate actions aimed at saving and efficient use of electric energy of HVAC systems applied to regions with hot and dry climates. The methodology consists of: (1) characterization of local climatology using the concept of degree-hours (DH). (2) Utilization of a Fourier-type mathematical model to calculate hourly temperature using only daily maximum and minimum temperatures as well as an empirical model to compute energy efficiency (EER) of air-cooled air conditioning units. (3) Thermal simulation applying a software developed by the authors based on ASHRAE's Transfer Functions methodology to calculate hourly cooling loads, the adequate sizing of air conditioning equipment and the rate of heat extraction. (4) System analysis, identification of improvement actions, evaluation of viable alternatives of saving and efficient use of energy. The advantage of this proposal is its flexibility because it can be applied to any climatology and easily adaptable to the conditions of energy usage anywhere in the world.","PeriodicalId":267436,"journal":{"name":"HVAC System","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134491005","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Types of HVAC Systems 暖通空调系统的类型

HVAC System Pub Date : 2018-11-05 DOI: 10.5772/INTECHOPEN.78942

S. Seyam

引用次数: 21