Modelling the thermal performance of a naturally ventilated greenhouse in Zimbabwe using a dynamic greenhouse climate model

Mashonjowa, Emmanuel; Ronsse, Frederik; Milford, J. R.; Pieters, Jan

doi:10.1016/j.solener.2012.09.010

Cited by 82 publications

(41 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[27][28][29][30][31][32] In past 5 years, many researches have been carried out ranging from design, drying kinematic, mode of heat transfer, modelling and testing of large scale greenhouse dryer, neural modelling of greenhouse dryer integrated with PV system, quasi-static and dynamic model for PV integrated greenhouse dryer. [33][34][35][36][37][38] The overall conclusions of these researches are that there was good agreement between the predicted and experimental values, integration of PV module reduced the consumption of conventional fuels, the drying time was faster and quality of products was better.…”

mentioning

confidence: 85%

Performance evaluation of photovoltaic thermal greenhouse dryer and development of characteristic curve

Shyam

Al-Helal

Singh

et al. 2015

Journal of Renewable and Sustainable Energy

View full text Add to dashboard Cite

Articles you may be interested inSteady state characterization of bifacial solar cells at different configurations of air-based photovoltaic thermal solar panels J. Renewable Sustainable Energy 6, 033140 (2014); 10.1063/1.4885117 Thermal performance analysis of solar clothes dryer J. Renewable Sustainable Energy 5, 043113 (2013); 10.1063/1.4816498 Design and performance evaluation of solar dryer for drying of large cardamom (Amomum subulatum) J. Renewable Sustainable Energy 4, 063129 (2012); 10.1063/1.4769199 Performance evaluation of a solar photovoltaic thermal air collector using energy and exergy analysis J. Renewable Sustainable Energy 3, 043115 (2011); 10.1063/1.3624760Performance evaluation of the semicylindrical solar tunnel dryer for drying handmade paper

show abstract

mentioning

confidence: 85%

Performance evaluation of photovoltaic thermal greenhouse dryer and development of characteristic curve

Shyam

Al-Helal

Singh

et al. 2015

Journal of Renewable and Sustainable Energy

View full text Add to dashboard Cite

show abstract

“…In recent years, there has been an increasing interest in the development of transient energy models in the agricultural sector . TRNSYS is a complete and extensible simulation environment that has been a popular choice for many researchers . TRNSYS is composed of several components that can help to model the greenhouse heating load and STES cycle.…”

Section: Methodsmentioning

confidence: 99%

Improving clean energy greenhouse heating with solar thermal energy storage and phase change materials

2019

View full text Add to dashboard Cite

Greenhouses consume a great deal of energy to heat their building envelopes.The strategic integration of solar energy and thermal energy storage (TES) can help to boost energy performance and reduce the carbon emission in the sector. In this paper, the benefits of adding phase change materials (PCM) to the water tank of a solar heating system have been evaluated using the Transient System Simulation (TRNSYS) program. Initially, the hourly heating load of a reference greenhouse was evaluated using TRNSYS software. The results were validated with natural gas consumption data. The validated simulation was then used to investigate the impact of PCM on the performance of a large-scale solar energy system. Four system configurations were evaluated; no PCM materials in the tank, then 20%, 40%, and 60% of the water tank volume occupied by PCM. Energy performance improvements of 10% to 14% were observed by increasing the proportion of PCM amounts over the baseline conventional system. Finally, an economic study was conducted to investigate the cost feasibility of different PCM concentrations. It was shown that PCM price, cost of natural gas, and carbon tax are the principal influence factors on the payback period. K E Y W O R D Sgreenhouse, phase change material (PCM), solar heating system

show abstract

“…For example, in case of greenhouses, several new concepts of CEA such as vertical farming and plant factories are presented in the literature [12,13] . Some of the research on the sustainability and clean energy application for high-tech greenhouses and plant factories can be found via the analysis of microclimate control and environment modelling [14][15][16][17][18][19][20] . It has been shown that a greenhouse design for tropical lowlands that benefits from high natural ventilation rates can efficiently keep the temperature and humidity like the outside climate, which has been shown to be 60%-75% optimal for tomato growth [21] .…”

Section: Introduction mentioning

confidence: 99%

Investigation of energy-efficient solid desiccant system for wheat drying

Hanif

Sultan

Miyazaki³

et al. 2019

International Journal of Agricultural and Biological Engineering

View full text Add to dashboard Cite

The study investigates the applicability of solid desiccant system for drying of freshly harvested wheat grains in order to reduce the moisture content to an optimum level. Fast and low-temperature drying systems are required by today's drying industries in order to provide economical and safe drying. Therefore, comparison of desiccant drying has been made with the conventional method in terms of drying kinetics, allowable time for safe storage, the total time for drying cycle, and overall energy consumption. It has been found that the air conditions of proposed desiccant drying system provides a high drying rate and longer allowable storage time for safe drying. As the desiccants possess water adsorbing ability by means of vapor pressure deficit, therefore, the desiccant system successfully provides low-temperature drying which ensures the quality of wheat grains. Overall energy consumption is estimated for both conventional hot air drying and desiccant drying system. It has been found that the desiccant system requires less energy as drying is accomplished at minimum level of air flow and within allowable storage time.In addition, the overall performance index of the desiccant system is higher at all temperatures. The study is useful for developing a low-cost and sustainable drying technology for various agricultural products.

show abstract

Modelling the thermal performance of a naturally ventilated greenhouse in Zimbabwe using a dynamic greenhouse climate model

Cited by 82 publications

References 39 publications

Performance evaluation of photovoltaic thermal greenhouse dryer and development of characteristic curve

Performance evaluation of photovoltaic thermal greenhouse dryer and development of characteristic curve

Improving clean energy greenhouse heating with solar thermal energy storage and phase change materials

Investigation of energy-efficient solid desiccant system for wheat drying

Contact Info

Product

Resources

About