Free

Photosynthesis Vs Photovoltaic - Essay Example

Comments (0) Cite this document
Summary
The essay "Photosynthesis versus photovoltaics" describes photosynthesis is a "sequence of reactions performed by green plants and photosynthetic bacteria in which the sun's light energy is converted into chemical energy and used to produce carbohydrates and, ultimately, all plant materials."…
Download full paperFile format: .doc, available for editing
GRAB THE BEST PAPER92.2% of users find it useful
Photosynthesis Vs Photovoltaic
Read TextPreview

Extract of sample "Photosynthesis Vs Photovoltaic"

Photosynthesis Vs Photovoltaic According to Dictionary of Botany (n.d Photosynthesis is “the sequence of reactions, performed by green plants and photosynthetic bacteria, in which light energy from the sun is converted into chemical energy and used to produce carbohydrates and ultimately all the materials of the plant.”
The basic photosynthesis process is divided into two stages: Light Reaction and Dark Reaction. In the Light reaction, energy is captured in the cells which produce energy carrier molecules that are further used in dark reaction. In the dark reaction, products of the light reaction are used to make C-C covalent bonds of carbohydrates. The photochemical reaction is as follows:
6H2O + 6CO2 + Light ---------> C6H12O6 + 6O2
Solar cells or PV cells are made up of a semi-conductor material like silicon etc. The incident sunlight is absorbed by the material; the solar energy knocks out electrons from their atoms, allowing the electrons to flow through the material to produce electricity. This process of converting photons to electrons is called the photovoltaic (PV) effect.
When we cast a glance at the structure and functioning of both the plant and solar cells, we come across various similarities and differences. The prime similarity in both the cells is the excitation of electrons to a higher energy level by the incoming photon of sunlight. In plant cell, it is done within a chlorophyll molecule whereas in solar cell, it occurs within a semi-conducting material like silicon.
Both the plant and solar cells absorb sunlight and convert it into useful form. In plant cell, sunlight is utilized to synthesize carbohydrates and form a basis for sustaining the life processes of all plants. In solar cell, incident sunlight is converted into electricity which is an essential need of human beings on Earth.
The plant cell contains a green pigment called Chlorophyll which serves two functions. It is used to absorb the sunlight and then utilize this light to excite the electrons. In solar cell, an organic dye is used which is coated on the crystals and it serves the same function as the chlorophyll in the plant cells i.e. it absorbs the light and produce an electron flow.
As like similarities, there are differences too between plant and solar cell. The primary difference is that plant cell stores sunlight during light reaction and can even synthesize carbohydrates during night time. Whereas solar cell is only effective when direct sunlight is incident on it. Its efficiency is almost negligible during cloudy season.
Plant cell converts sunlight into chemical energy by the photosynthesis process and solar cell converts it directly into electrical energy which is then used by humans. Photosynthesis is a natural process which is automatically carried out in all plants but electricity generation by solar cells is an artificial procedure. Solar cells need to be installed for this purpose and it requires much investment. Therefore, they are much expensive as compared to plant cell. Another significant difference between both cells is that the bad photosynthetic cell can repair itself whereas there is no such provision in case of solar cells.
Both photosynthesis and photovoltaic energy conversion systems deal with transfer and conversion of heat energy into another form. Thus both systems should show compatibility with the Laws of Thermodynamics. The first law of thermodynamics accounts for the energy conservation of heat systems i.e. energy cannot be created nor destroyed, it only transforms from one form to another. According to (Cengel & Boles, 2006), “A change in the internal energy of a closed thermodynamic system is equal to the difference between the heat supplied to the system and the amount of work done by the system on its surroundings”. Both plant and solar cells do not create energy but rather convert one form (solar irradiation) of energy into another (chemical or electrical).
The second law of thermodynamics explains the phenomenon of irreversibility in nature. A certain amount of "transformation energy" will be used as the molecules of the "working body" do work on each other when they change from one state to another. During this transformation, there will be a certain amount of heat energy loss or dissipation due to intermolecular friction and collisions; energy that will not be recoverable if the process is reversed. We know that both photosynthesis and photovoltaic energy conversion systems are not 100% efficient and dissipate heat energy during their respective processes which is according to the second law.

References:
Photosynthesis. (n.d.). In Dictionary of Botany. Retrieved from http://botanydictionary.org/photosynthesis
Pierret, R. F. (1996). Semiconductor Device Fundamentals (2nd Ed.). Boston, MA: Addison Wesley.
Cengel, Y. A., & Boles, M. A. (2006). Thermodynamics: An Engineering Approach (5th Ed.). New Delhi, India: McGraw-Hill.
Gunning, B. E., & Steer, M. W. (1996). Plant Cell Biology: Structure And Function. Burlington, MA: Jones Bartlett Learning. Read More
Cite this document
  • APA
  • MLA
  • CHICAGO
(“Photosynthesis Vs Photovoltaic Essay Example | Topics and Well Written Essays - 500 words”, n.d.)
Retrieved from https://studentshare.org/biology/1578614-photosynthesis-vs-photovoltaic
(Photosynthesis Vs Photovoltaic Essay Example | Topics and Well Written Essays - 500 Words)
https://studentshare.org/biology/1578614-photosynthesis-vs-photovoltaic.
“Photosynthesis Vs Photovoltaic Essay Example | Topics and Well Written Essays - 500 Words”, n.d. https://studentshare.org/biology/1578614-photosynthesis-vs-photovoltaic.
  • Cited: 0 times
Comments (0)
Click to create a comment or rate a document

CHECK THESE SAMPLES OF Photosynthesis Vs Photovoltaic

Photovoltaic cells

...? Photovoltaic Cells Solar energy, being a renewable source of energy, is a boon for those who live in isolated locations, particularly where grid power cannot reach. Van Geet home is an off-grid house that has received a special attention for its energy saving designs. Photovoltaic Cell is a heart of energy systems producing energy from sun. PV cells alone constitute almost 50 percent of the total cost of such energy system; therefore, all research is directed toward the reduction of its production cost. Though it is still a costly technology yet its cost per watt has reduced considerably in last few years. PV cells energy conversion efficiency has now crossed mark of 20 percent. Several companies,...
6 Pages(1500 words)Research Paper

PHOTOSYNTHESIS

...? HILL’S REACTION TO DEMONSTRATE THE ELECTRON TRANSFER DURING THE LIGHT REACTION OF PHOTOSYNTHESIS By: Presented Aim The aim of the practical is to learn about cell fractionation and how isolated thykaloid membranes can be used for photosynthetic reactions (Lab 6, n.d.; Marietta University, n.d.). It also helps in learning how quantitative measurements of photosynthetic electron transport can be made through the Hill reaction. It is aimed at demonstrating the Hill reaction of photosynthesis and the reaction conditions that affect it. At the end of the practical, the learner should produce a report that can be used by other scientists to understand the light dependent reaction in...
4 Pages(1000 words)Essay

Report on photosynthesis lab

...Revisiting Blackman's limiting conditions for photosynthesis: influence of temperature on photosynthetic rate of leaf disks Among other factors, ambient temperature has been reported to significantly influence the apparent photosynthetic rate of plants. In this paper, we demonstrate the influence of ambient temperature on apparent photosynthetic rate using a leaf disk model system. Our results indicate that apparent photosynthetic rate increases with temperature. We discuss the possible reasons for the observed pattern and discuss the implications that the relation may have for plant growth and productivity. Introduction Among several environmental variables, temperature has been known to strongly influence...
8 Pages(2000 words)Lab Report

Photosynthesis

...Running Head: Constructing Profile Constructing Profile of the of the of the . Introduction The rate of photosynthesis is increased by increase in temperature until an optimum temperature is reached. If the temperature is increased beyond the optimum temperature the rate of photosynthesis will decrease. Photosynthesis is the process that is used by plants to make food. Through this process plants trap light energy to convert it into organic energy in the form of glucose. The rate of photosynthesis is affected by factors like: carbon dioxide concentration, temperature and light intensity. If two of these factors are kept constant while one of the factor is increased, the rate of photosynthesis will increase but up to certain point... . At that...
2 Pages(500 words)Lab Report

Photosynthesis

...Photosynthesis Photosynthesis is the process that occurs in the chloroplasts residing in mesophyll cells through which plants take in the light energy from the sun and convert it to chemical energy. This happens by taking 6 water molecules and 6 carbon dioxide molecules and releasing 1 sugar molecule and 6 oxygen molecules (Starr, Taggart, Evers, & Starr, 2009). 6H2O + 6CO2 ----------> C6H12O6+ 6O2 Chloroplasts are made up of thylakoid membranes where the green pigment chlorophyll is found. Chlorophyll looks green because it absorbs the red and blue wavelength of the visible light spectrum, reflecting back the green. The molecule is made up of a porphyrin ring with several carbon and nitrogen bonds and a...
2 Pages(500 words)Essay

Photosynthesis

...Effects of Green and Blue Light on the Rate of Photosynthesis Photosynthesis is defined as a process by which green plants, cyanobacteria and algae make their own food. This process begins when the green plants, cyanobacteria and algae convert energy from sun into chemical bond energy of organic molecules such as sugars. During photosynthesis, light energy will be used to synthesize water and carbon dioxide to produce glucose and oxygen (Lena, 2010). Complex reaction of photosynthesis that takes place in the leaves can be summarized as follows: Sunlight and chloroplasts 6CO2 + 6H2O 6O2 + C6H12O6 Carbon water oxygen ...
4 Pages(1000 words)Lab Report

Photosynthesis

...Yoo Jin Choi Biology 1108 2/4/14 Photosynthesis Lab assignment Introduction Photosynthesis is a process by which light energy is converted into chemical energy. It involves uptake of carbon (IV) oxide and release of oxygen. Being an enzymatic process, there are other factors that regulates it. There is a relationship that exists between photosynthesis and respiration in regard to the exchange of the respiratory gases i.e. oxygen and carbon (IV) oxide (Berg 71). In this experiment, Light as a necessity of photosynthesis is the variable under investigation. According to the research design in this experiment, leaf disks float rate would be used to measure rate of...
2 Pages(500 words)Lab Report

Respiration and Photosynthesis

...Respiration and Photosynthesis Respiration and photosynthesis are complement to each other; while photosynthesis utilises light energy, carbon IV oxide and water to produce glucose and oxygen, respiration uses the produced oxygen to break down glucose into carbon IV oxide and water. In the environment, green plants by the process of photosynthesis release carbon IV oxide which is taken up by other living organisms for respiration which in turn release oxygen required for photosynthesis (Photosynthesis vs. Respiration 2012). Respiration and photosynthesis are similar in the production of energy rich...
3 Pages(750 words)Essay

Photosynthesis

...Photosynthesis Photosynthesis relates to the process through which green plants and other specific organisms use sunlight in synthesizing carbohydrates from water and carbon dioxide. The process occurs in three imperative stages including harnessing sunlight energy, synthesizing NADPH and ATP using energy harnessed, with the last step being Calvin cycle involving CO2 fixation. Calvin cycle as the last step uses ATP, CO2, NADPH, and ribulose 1, 5-biphosphate to synthesize glyceraldehydes 3-phosphate used in production of sugar and starch through glycolysis (Hurd et. 179). The overall process of photosynthesis occurs through the chemical reaction outlined as. 6CO2 + 6H2O + light-------->...
1 Pages(250 words)Assignment

Photosynthesis In Plants

...Lab: Photosynthesis in plants al affiliation Background information: Photosynthesis is the process by which plants use light energy to convert water and carbon dioxide into carbohydrates and oxygen. Carbohydrates are useful for plant processes. Factors that affect photosynthesis include water, temperature, carbon dioxide and light intensity. This experiment is aimed to find out how light intensity affects photosynthesis Methods: Three leaves of lilies were covered by aluminum foil. A leaf was uncovered weekly, observed and photographed. Results: The leaves that were covered for a longer time turned brown and dried out. Discussion: an increase in light intensity...
2 Pages(500 words)Essay
sponsored ads
We use cookies to create the best experience for you. Keep on browsing if you are OK with that, or find out how to manage cookies.

Let us find you another Essay on topic Photosynthesis Vs Photovoltaic for FREE!

Contact Us