Solid Phase Heat Recovery and Multi Chamber Reduction for Redox Cycles

2014 ◽  
Author(s):  
Stefan Brendelberger ◽  
Jan Felinks ◽  
Martin Roeb ◽  
Christian Sattler
Keyword(s):  
Heat Recovery ◽  
Energy Savings ◽  
Solid Phase ◽  
High Heat ◽  
Special Focus ◽  
Chamber System ◽  
Complex Flow ◽  
Redox Cycles ◽  
Recovery System ◽  
Heat Recovery System

A system approach was used for the development of a new process concept for solar driven thermochemical redox cycles. Two aspects of this concept will be presented here. Since a high heat recovery rate for cycles using non-stoichiometric reduction has been identified as elementary in order to reach meaningful overall process efficiencies, a special focus was directed on this aspect. A quasi-countercurrent heat recovery system, which makes use of a particulate heat transfer medium, was outlined and numerically analyzed. The analysis shows that recovery rates of more than 70% seem realistic. Even though the heat recovery system is based on an arrangement of stages including relative complex flow pattern the basic principle seems promising and opens up new pathways for system design and optimization. The second aspect highlighted of the developed process concept is the use of a multi chamber system with optimized reaction conditions for the reduction of the redox material. By optimizing the pressure in a multi chamber system energy savings related to the pumping work of more than 20% are predicted. Also the execution of pre-reduction in the heat recovery system is discussed.

scholarly journals A Method for Simulating Heat Recovery Systems Using AirModel in Implementations of the ASHRAE Simplified Energy Analysis Procedure

2011 ◽  
Vol 250-253 ◽  
pp. 3083-3089
Author(s):  
Cheng Gang Liu ◽  
Guang Hua Wei ◽  
Homer L. Bruner
Keyword(s):  
Heat Recovery ◽  
Energy Savings ◽  
Energy Analysis ◽  
Energy Systems ◽  
Hvac Systems ◽  
Analysis Procedure ◽  
Specific Input ◽  
Duct Systems ◽  
Recovery System ◽  
Heat Recovery System

A method for simulating heat recovery systems using AirModel in implementations of the ASHRAE simplified energy analysis procedure was developed in this paper. AirModel, a simulation tool used to simulate the energy consumption of building heating, ventilating, and air-conditioning (HVAC) systems, was developed by the Energy Systems Laboratory (ESL) at Texas A&M University (TAMU) in the 1990’s. This program is capable of simulating single duct reheat systems and dual duct systems with economizer cycles. However, in certain buildings, energy savings techniques such as heat recovery systems are implemented but AirModel does not have a specific input to simulate this system. Presented in this paper is a method to simulate a heat recovery system using AirModel. An example of this methodology was used to simulate the HVAC system with a heat recovery system for the Biophysics and Biochemistry building on the TAMU campus.

LAHU Heat Recovery System Optimal Operation and Control Schedules

2005 ◽  
Vol 128 (3) ◽  
pp. 360-366 ◽  
Author(s):  
Yujie Cui ◽  
Mingsheng Liu
Keyword(s):  
Thermal Energy ◽  
Heat Recovery ◽  
Energy Savings ◽  
Pump Energy ◽  
Weather Conditions ◽  
Optimal Operation ◽  
Air Handling Unit ◽  
Recovery System ◽  
Heat Recovery System ◽  
And Control

Optimal operation and control of heat recovery in an integrated Laboratory Air Handling Unit (LAHU) system differs substantially from that in conventional dedicated AHUs for laboratory buildings with a 100% outside air AHU for laboratory spaces, since the LAHU allows economizer operation for both offices and laboratories. Optimal operation and control schedules of the heat recovery systems in the LAHU have been developed to minimize the total thermal energy cost. This paper presents the procedure, methodology, and results of generic optimal heat recovery control schedules for the LAHU and investigates its impact on the LAHU potential thermal and pump energy savings. The optimal control schedule can potentially save 14% to 27% thermal energy and 17% to 100% pump energy during the winter under weather conditions that prevail in Omaha, Nebraska. The findings discussed in this paper also apply to any heat recovery system, where AHU has an economizer function.

scholarly journals Primary energy efficiency assessment of a coil heat recovery system within the air handling unit of an operating room

2021 ◽  
Vol 2069 (1) ◽  
pp. 012113
Author(s):  
F J Rey-Martínez ◽  
J F San José-Alonso ◽  
E Velasco-Gómez ◽  
A Tejero-González ◽  
P M Esquivias
Keyword(s):  
Energy Consumption ◽  
Energy Balance ◽  
Thermal Energy ◽  
Heat Recovery ◽  
Energy Savings ◽  
Electric Energy ◽  
Primary Energy ◽  
Recovery System ◽  
Heat Recovery System ◽  
Coil Heat

Abstract Heat recovery systems installed in Air Handling Units (AHUs) are energy efficient solutions during disparate outdoor-to-indoor temperatures. However, they may be detrimental in terms of a primary energy balance when these temperatures get closer, due to the decrease in the thermal energy recovered compared to the global energy consumption required for their operation. AHUs in surgical areas have certain particularities such as their continuous operation throughout the year, the large airflows supplied and the strict exigencies on the supply air quality, avoiding any cross contamination. This work presents the measurements and analysis performed on a coil heat recovery (run-around) loop system installed in the AHU that serves a mixed-air ventilation operating room in a Hospital Complex. A primary energy balance is studied, including the thermal and electric energy savings achieved, considering the electric energy consumption by the recirculation pump and the additional power requirements of fans due to the pressure drop introduced. The obtained value is then used to predict the thermal energy savings achieved by the heat recovery system. Results are extrapolated to the Typical Meteorological Year to provide an order of magnitude of the primary energy and CO2 emissions saved through the operation of the coil heat recovery system.

ANALYSIS ON THE EFFECT OF NANO PARTICLES IN WASTE HEAT RECOVERY SYSTEM USING HEAT PIPES BY RSM

2019 ◽  
Vol 14 (1) ◽  
Author(s):  
Gunabal S
Keyword(s):  
Response Surface Methodology ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Heat Pipes ◽  
Filling Ratio ◽  
Nano Particles ◽  
Waste Heat Recovery System ◽  
Recovery System ◽  
Heat Recovery System

Waste heat recovery systems are used to recover the waste heat in all possible ways. It saves the energy and reduces the man power and materials. Heat pipes have the ability to improve the effectiveness of waste heat recovery system. The present investigation focuses to recover the heat from Heating, Ventilation, and Air Condition system (HVAC) with two different working fluids refrigerant(R410a) and nano refrigerant (R410a+Al2O3). Design of experiment was employed, to fix the number of trials. Fresh air temperature, flow rate of air, filling ratio and volume of nano particles are considered as factors. The effectiveness is considered as response. The results were analyzed using Response Surface Methodology

On the suitable superstructure thermoeconomic optimization of a waste heat recovery system for a Brazilian diesel engine power plant

2021 ◽  
Vol 234 ◽  
pp. 113947
Author(s):  
Alexandre Persuhn Morawski ◽  
Leonardo Rodrigues de Araújo ◽  
Manuel Salazar Schiaffino ◽  
Renan Cristofori de Oliveira ◽  
André Chun ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Power Plant ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Waste Heat Recovery System ◽  
Recovery System ◽  
Heat Recovery System ◽  
Engine Power
Sign in / Sign up

Export Citation Format

Share Document