The Designs and Analysis of Wasting Heat Utilization in the Large Comprehensive Hospital Scheme

2014 ◽  
Vol 587-589 ◽  
pp. 320-324
Author(s):  
Hai Feng Guo ◽  
Wei Li ◽  
Xuan Rui Zhang
Keyword(s):  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Large Scale ◽  
Waste Heat ◽  
Recovery Efficiency ◽  
Hospital Waste ◽  
Efficiency Optimization ◽  
Heat Utilization ◽  
Optimization Study ◽  
Waste Heat Utilization

In this paper, to achieve waste heat utilization of large-scale comprehensive public study of Shenyang part of large-scale comprehensive hospital, first it has carried on the statistics of hospital waste heat utilization of point, adopting the K - means methods to classify the hospital waste heat utilization point and analyze the waste heat and establish waste heat utilization system .Then four paths of waste heat utilization have been got to get a further hospital waste heat utilization system of waste heat recovery efficiency, optimization study for the future.

Research on Waste Heat Recovery in Drain Water of Barbershop

2012 ◽  
Vol 204-208 ◽  
pp. 4229-4233 ◽  
Author(s):  
Fang Tian Sun ◽  
Na Wang ◽  
Yun Ze Fan ◽  
De Ying Li
Keyword(s):  
Heat Exchanger ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Utilization Efficiency ◽  
Drain Water ◽  
Waste Heat Recovery System ◽  
Heat Utilization ◽  
Recovery System ◽  
Heat Recovery System

Drain water at 35°C was directly discharged into sewer in most of barbershop with Electric water heater. Heat utilization efficiency is lower, and energy grade match between input and output is not appropriate in most of barbershops. Two waste heat recovery systems were presented according to the heat utilization characteristics of barbershops and principle of cascade utilization of energy. One was the waste heat recovery system by water-to-water heat exchanger (WHR-HE), and the other is the waste heat recovery system by water-to-water heat exchanger and high-temperature heat pump (WHR-CHEHP). The two heat recovery systems were analyzed by the first and second Laws of thermodynamic. The analyzed results show that the energy consumption can be reduced about 75% for HR-HE, and about 98% for WHR-CHEHP. Both WHR-HE and WHR-CHEHP are with better energy-saving effect and economic benefits.

scholarly journals Analysis and Design of a Silicide-Tetrahedrite Thermoelectric Generator Concept Suitable for Large-Scale Industrial Waste Heat Recovery

Energies ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5655
Author(s):  
F. P. Brito ◽  
João Silva Peixoto ◽  
Jorge Martins ◽  
António P. Gonçalves ◽  
Loucas Louca ◽  
...  
Keyword(s):  
Industrial Waste ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Large Scale ◽  
Waste Heat ◽  
Magnesium Silicide ◽  
Small Scale ◽  
Analysis And Design ◽  
Industrial Waste Heat ◽  
Balanced Solution

Industrial Waste Heat Recovery (IWHR) is one of the areas with strong potential for energy efficiency and emissions reductions in industry. Thermoelectric (TE) generators (TEGs) are among the few technologies that are intrinsically modular and can convert heat directly into electricity without moving parts, so they are nearly maintenance-free and can work unattended for long periods of time. However, most existing TEGs are only suitable for small-scale niche applications because they typically display a cost per unit power and a conversion efficiency that is not competitive with competing technologies, and they also tend to rely on rare and/or toxic materials. Moreover, their geometric configuration, manufacturing methods and heat exchangers are often not suitable for large-scale applications. The present analysis aims to tackle several of these challenges. A module incorporating constructive solutions suitable for upscaling, namely, using larger than usual TE elements (up to 24 mm in diameter) made from affordable p-tetrahedrite and n-magnesium silicide materials, was assessed with a multiphysics tool for conditions typical of IWHR. Geometric configurations optimized for efficiency, power per pair and power density, as well as an efficiency/power balanced solution, were extracted from these simulations. A balanced solution provided 0.62 kWe/m2 with a 3.9% efficiency. Good prospects for large-scale IWHR with TEGs are anticipated if these figures could be replicated in a real-world application and implemented with constructive solutions suitable for large-scale systems.

A Combined Organic Rankine Cycle With Double Modes Used for Internal Combustion Engine Waste Heat Recovery

2017 ◽  
Vol 139 (11) ◽  
Author(s):  
Guohui Zhu ◽  
Jingping Liu ◽  
Jianqin Fu ◽  
Shuqian Wang
Keyword(s):  
Energy Recovery ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Heat Energy ◽  
Working Fluid ◽  
Temperature Cycle ◽  
Recovery Efficiency

A combined organic Rankine cycle (ORC) was proposed for both engine coolant energy recovery (CER) and exhaust energy recovery (EER), and it was applied to a gasoline direct injection (GDI) engine to verify its waste heat recovery (WHR) potential. After several kinds of organic working medium were compared, R123 was selected as the working fluid of this ORC. Two cycle modes, low-temperature cycle and high-temperature cycle, were designed according to the evaporation way of working fluid. The working fluid is evaporated by coolant heat in low-temperature cycle but by exhaust heat in high-temperature cycle. The influence factors of cycle performance and recovery potential of engine waste heat energy were investigated by cycle simulation and parametric analysis. The results show that recovery efficiency of waste heat energy is influenced by both engine operating conditions and cycle parameters. At 2000 r/min, the maximum recovery efficiency of waste heat energy is 7.3% under 0.2 MPa brake mean effective pressure (BMEP) but 10.7% under 1.4 MPa BMEP. With the combined ORC employed, the fuel efficiency improvement of engine comes up to 4.7% points under the operations of 2000 r/min and 0.2 MPa BMEP, while it further increases to 5.8% points under the operations of 2000 r/min and 1.4 MPa BMEP. All these indicate that the combined ORC is suitable for internal combustion (IC) engine WHR.

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